CN106169345A - A kind of neodymium iron boron magnetic body and preparation method and neodymium iron boron magnetic body photo frame - Google Patents
A kind of neodymium iron boron magnetic body and preparation method and neodymium iron boron magnetic body photo frame Download PDFInfo
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- CN106169345A CN106169345A CN201610771536.2A CN201610771536A CN106169345A CN 106169345 A CN106169345 A CN 106169345A CN 201610771536 A CN201610771536 A CN 201610771536A CN 106169345 A CN106169345 A CN 106169345A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0573—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes obtained by reduction or by hydrogen decrepitation or embrittlement
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
- A47G1/14—Photograph stands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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Abstract
The invention provides a kind of neodymium iron boron magnetic body and preparation method and neodymium iron boron magnetic body photo frame, described magnet food ingredient is Nd:28 32%, Nb:2.7～2.9%, Co:2.8～4%, Zr:0.23～0.32%, Er:10～15%, Ti:0.1～0.3%, B:1.4～2.1%, Tm2O3: 2.8～4%, adipic dihydrazide ADH:3～3.5%, surplus is Fe.In the preparation of this neodymium iron boron magnetic body, sintering method comprises gradient increased temperature, gradient cooling step, for the first time tempering and second time tempering.The magnetic photo frame structure that this neodymium iron boron magnetic body makes includes lamella lucida, baffle plate, photo frame, photo and backboard；Also include neodymium iron boron magnetic body block, neodymium iron boron magnetic body thin slice and manual pulling part.Neodymium iron boron magnetic body formula and method is used to be prepared so that neodymium iron boron magnetic body magnetization is more uniform；Making magnetic photo frame with neodymium iron boron magnetic body of the present invention, its service life is longer.
Description
Technical field
The present invention relates to powder metallurgical technology, particularly relate to a kind of Sintered NdFeB magnet and neodymium iron boron magnetic materials phase
Frame.
Background technology
Along with the development of society, the application of Magnet is more extensive, from high-tech product to simplest packaging magnetic.Mesh
Front rare-earth magnet is widely used in many fields, such as the recent walking robot with mechanical brains, rare-earth Nd-Fe-B
The magnetic photo frame that magnet is made, the every aspect that magnetic refrigerator paste etc. is lived for people.How to improve Br with Hcj and become neodymium ferrum
Boron magnet development trend.Due to the characteristic of neodymium iron boron magnetic body, Br and Hcj is mutually to restrict, magnet HCJ Hcj
Being improved, the remanent magnetism Br of magnet will reduce；If improving the remanent magnetism Br of magnet, then magnet HCJ Hcj will be subject to
Impact, the most in use needs well to balance both, thus reaches the neodymium iron boron magnetic body being more satisfied with.
Such as Chinese patent CN102592770A discloses a kind of sintered NdFeB magnet and manufacture method thereof, its composition
Consist of: Nd and Pr:27.3～27.8wt%, Tb:1.0～1.8wt%, Al:0.1～0.4wt%, Cu:0.08～
0.14wt%, Co:0～2wt%, Ga:0～0.14wt%, B:0.93～1.0wt%, remaining is Fe；And (BH) of described magnet
Max ＞ 47MGOe, Hcj ＞ 16kOe.The manufacture method of this sintered NdFeB magnet comprises the steps: dispensing；Vacuum induction speed
Solidifying stove melting, obtains getting rid of band alloy sheet；The hydrogenation of band alloy sheet will be got rid of broken, in airflow milling, then make micropowder；Will
To micropowder carry out mixed powder；Mixed micropowder die mould is become blank；Put into vacuum sintering furnace after isostatic pressed to be sintered；Sinter
Carry out secondary ageing after one-tenth, obtain described magnet.By adjusting formula and the improvement of sintering of neodymium iron boron in this invention, increase surplus
Magnetic Br and HCJ Hcj, but passing through to be sintered intensification in vacuum sintering furnace in sintering process is the burning that disposably heats up
Knot, such consequence can make neodymium iron boron heating too fast, cause magnetizing uneven.Such as Chinese patent CN104952580A announces
A kind of present invention corrosion-resistant Sintered NdFeB magnet, is grouped into by the one-tenth of following mass percent: Pr10～15%, Nd18～
21%, Ho 3～5%, F0.5～0.8%, Ni0.5～2.0%, Mn0.1～0.2%, Cu0.1～0.35%, Al0.1～
0.5%, B0.6～1.2%, surplus is Fe, and uses segmentation microwave sintering process to prepare.This invention have employed segmentation microwave and burns
Knot, but do not carry out temper, therefore the remanent magnetism Br and HCJ Hcj of this neodymium iron boron magnetic body are the highest.
Summary of the invention
Magnetizing irregular, remanent magnetism and the highest problem of HCJ present in prior art for overcoming, the present invention provides
A kind of Sintered NdFeB magnet and neodymium iron boron magnetic materials photo frame.
The invention provides a kind of neodymium iron boron magnetic body, described magnet food ingredient consist of Nd:28-32%, Nb:2.7
～2.9%, Co:2.8～4%, Zr:0.23～0.32%, Er:10～15%, Ti:0.1～0.3%, B:1.4～2.1%,
Tm2O3: 2.8～4%, adipic dihydrazide ADH:3～3.5%, surplus is Fe.Due to Tm2O3Addition so that neodymium iron boron magnetic body
There is more excellent magnetic characteristic；The addition of adipic dihydrazide ADH improves neodymium iron boron magnetic body antioxygenic property.
Further, described magnet food ingredient consist of Nd:30%, Nb:2.8%, Co:3.5%, Zr:0.3%,
Er:13%, Ti:0.2%, B:1.8%, Tm2O3: 3.3%, adipic dihydrazide ADH:3.25%, surplus is Fe.
A kind of preparation method of described neodymium iron boron magnetic body, the preparation process of this neodymium iron boron magnetic body includes: dispensing-melting-
Hydrogen is broken-shape-sintering, and raw material is put in smelting furnace and is carried out melting by described melting；Described hydrogen is broken is the suction hydrogen utilizing neodymium iron boron
Characteristic, uses the broken machine of hydrogen to carry out the broken operation of hydrogen；Described shaping is to use hydrostatic pressing；Described sintering method comprises gradient liter
Temperature, gradient cooling step, for the first time tempering and second time tempering；Its order is to return gradient increased temperature-gradient cooling step-first time
Fire-second time tempering；Described gradient increased temperature step is as follows: first carry out the first gradient increased temperature, and the heating-up time is that 0.5-0.8 is little
Time, furnace temperature rises to 400-450 DEG C, and temperature retention time is 0.8-1.2 hour；Then carrying out the second gradient increased temperature, the heating-up time is
0.8-1.2 hour, furnace temperature was to 800-820 DEG C, and temperature retention time is 1.2-1.5 hour；Carry out the 3rd gradient increased temperature subsequently, during intensification
Between be 1.8-2.1 hour, furnace temperature is to 1000-1160 DEG C, and temperature retention time is 1.5-1.8 hour；Finally carry out the 4th gradient increased temperature,
Heating-up time is 2.1-2.5 hour, and furnace temperature is to 1330-1380 DEG C, and temperature retention time is 1.8-2.1 hour；Described gradient cooling walks
Rapid as follows: first carrying out the first gradient cooling, temperature fall time is 0.3-0.5 hour, furnace temperature 400-420 DEG C, and temperature retention time is
0.2-0.3 hour；Finally carrying out the second gradient cooling, temperature fall time is 0.2-0.3 hour, and furnace temperature is less than 150 DEG C, obtains densification
Property and the high neodymium iron boron magnetic body of HCJ.
Further, described first time temperature is set in temperature and is 900-1100 DEG C, and air cooling is to furnace temperature.
Further, described second time temperature is set in 1300-1400 DEG C, and air cooling is to furnace temperature.
The magnetic photo frame that a kind of described neodymium iron boron magnetic body makes, described magnetic photo frame structure includes lamella lucida, baffle plate, phase
Frame, photo and backboard；Described lamella lucida is arranged in photo frame；Described baffle plate is located at lamella lucida and backboard centre position, described photograph
Sheet is located at the front of baffle plate；Described magnetic photo frame also includes neodymium iron boron magnetic body block, neodymium iron boron magnetic body thin slice and manual pulling part；Institute
State photo frame to be made up of left side baffle plate, base plate, right-hand apron, panel, backboard and angled piece, described left side baffle plate, base plate and right side
Baffle plate joins end to end and forms U-shaped framework, in the front sticking panel of U-shaped framework, the reverse side adhesive back of U-shaped framework；Described directly
Corner fittings is connected with panel by tumbler；The centre position in backboard front is located at by described neodymium iron boron magnetic body frame；Described neodymium-iron-boron
Body thin slice is located at the hypotenuse of angled piece；Described manual pulling part is located at the lower position outside right-hand apron.
Further, described tumbler is arranged at the hypotenuse of angled piece；The hypotenuse of angled piece is divided into hypotenuse a by tumbler
With hypotenuse b, angled piece tumbler is that fulcrum front and back overturns.
Further, described panel be arranged over two sections of grooves；The radius of curvature of the first paragraph groove III of panel is with straight
The radius of gyration of corner fittings hypotenuse a is consistent.
Further, described manual pulling part be shaped as V-arrangement, the bottom of manual pulling part pass through screw b and right-hand apron phase
Even, manual pulling part rotates with screw b for the center of circle.
Further, described right-hand apron has sliding tray near manual pulling part and neodymium iron boron magnetic body block junction；Described
Chute is the rotational travel that manual pulling part drives neodymium iron boron magnetic body block.
Compared with prior art, the invention has the beneficial effects as follows:
(1) present invention passes through sintering method so that neodymium iron boron magnetic body magnetization is more uniform；
(2) using gradient increased temperature to be sintered so that magnet crystal grain of the present invention distribution is more uniform, rich neodymium border is the most more
Narrow；
(3) double tempering is used so that neodymium iron boron magnetic body of the present invention has higher remanent magnetism Br and HCJ Hcj；
(4) magnetic photo frame using neodymium iron boron magnetic body to make in the present invention is longer for its service life；
(5) existence of angled piece in magnetic photo frame, can quickly and conveniently change photograph；
(6) existence of manual pulling part in magnetic photo frame, takes from rigid surface to photo frame more laborsaving, convenient.
Accompanying drawing explanation
Fig. 1 is the preparation flow figure of neodymium iron boron magnetic body；
Fig. 2 is magnetic photo frame side sectional view；
Fig. 3 is magnetic photo frame side schematic view；
Fig. 4 is angled piece schematic diagram；
Fig. 5 is magnetic photo frame panel schematic diagram；
Fig. 6 is magnetic photo frame overall schematic.
In conjunction with accompanying drawing labelling thereon:
1-panel, the manual pulling part of 2-, 3-neodymium iron boron magnetic body block, 4-screw a, 5-screw b, 6-chute, 7-photo, 8-right angle
Part, 9-tumbler, 10-groove I, 11-groove II, 12-groove III, 13-lamella lucida, 14-square hole, baffle plate on the left of 15-, 16-is right
Side shield, 17-backboard, 31-neodymium iron boron magnetic body thin slice, 81-hypotenuse a, 82-hypotenuse b.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that described herein
Specific embodiment only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Present embodiment discloses a kind of Sintered NdFeB magnet and neodymium iron boron magnetic materials photo frame.
A kind of Sintered NdFeB magnet magnet, described magnet composition consist of Nd:28-32%, Nb:2.7～2.9%,
Co:2.8～4%, Zr:0.23～0.32%, Er:10～15%, Ti:0.1～0.3%, B:1.4～2.1%, Tm2O3: 2.8～
4%, adipic dihydrazide ADH:3～3.5%, surplus is Fe.Preferably, neodymium iron boron magnetic body becomes to be grouped into: Nd:30%, Nb:
2.8%, Co:3.5%, Zr:0.3%, Er:13%, Ti:0.2%, B:1.8%, Tm2O3: 3.3%, adipic dihydrazide ADH:
3.25%, surplus is Fe.The preparation method of neodymium iron boron magnetic body includes dispensing-melting-shaping-sintering；Described neodymium-iron-boron system
Standby step is: first carry out dispensing, due to Tm in dispensing2O3Addition so that neodymium iron boron magnetic body has more excellent magnetic characteristic；
The addition of adipic dihydrazide ADH improves neodymium iron boron magnetic body antioxygenic property.The raw material good by prior proportioning is put into smelting furnace
In carry out melting, owing to rare earth can be sent out more in fusion process, the actual charge ratio of the raw material middle rare earth therefore prepared sets
Dispensing have more 0.5 times, it is ensured that the content of rare earth in magnet after melting meets recipe requirements.Raw material starts after putting into smelting furnace
Carry out evacuation, close when vacuometer reaches 0 and take out valve and lobe pump in advance, now close vacuometer, open charge valve, to smelting furnace
In carry out argon filling, until manometric pressure is 0.05Mpa, close charge valve stop argon filling, open main power source and control power supply
Carry out melting.Stand 2 minutes after refine and start ingot casting, when the temperature in smelting furnace is down to 80 DEG C, manually exit, go out
Stove, completes fusion process.Carry out hydrogen after melting to crush.The broken principle of hydrogen: utilize the hydrogen absorption characteristic of rare earth intermetallic compound, by neodymium
Ferroboron is placed under hydrogen environment, and hydrogen enters alloy along rich neodymium phase thin layer, is allowed to expansion explosion and crushes, along rich neodymium phase layer
Place's cracking, so that thin slice becomes coarse powder.Ingot casting after melting is put in hydrogen crushing furnace, nitrogen is imported in hydrogen crushing furnace and just carrying out
Pressing simple and crude, leak detection final vacuum, to atmospheric pressure, carries out evacuation negative pressure leakage detection, imports hydrogen when meeting technological requirement, allows alloy
Carry out inhaling hydrogen, after inhaling hydrogen, alloyed powder is carried out dehydrogenation, when being first pumped to below 40mba, the auto-power on intensification of system, intensification limit, limit
Evacuation, general intensification 40 minutes.When temperature reaches design temperature, it is incubated 1-3 hour, when vacuum reaches operation card requirement,
Dehydrogenation completes.Carry out coarse powder stirring, stir laggard row airflow milling and obtain fine powder.Forming process, this reality is entered after the broken operation of hydrogen
Executing forming process in example and use hydrostatic pressing, after product threading equipment to be pressed, product is situated between to impartial supertension by each
Matter effect, makes product density increase.After shaping terminates, enter sintering circuit.
Preferably, the sintering furnace used in described sintering circuit is microwave vacuum sintering furnace.The key of Microwave Sintering Techniques
Being microwave heating, its principle is that material occurs electronic polarization, atom polarization, interfacial polarization, dipole to turn to pole under microwave action
The modes such as change, are heat energy by the electromagnetic energy of microwave.Can dramatically reduction sintering temperature, significantly up to 500 DEG C；It is greatly reduced
Energy consumption, energy-conservation up to 7O mono-9O%；Shorten sintering time, up to more than 5O%；Significant raising dense structure degree, crystal grain thinning,
Improve material property.
Described sintering circuit comprises gradient increased temperature and gradient cooling step；Described sintering method comprises gradient increased temperature, gradient
Cooling step, for the first time tempering and second time tempering；Its order is gradient increased temperature-gradient cooling step-first time tempering-the second
Secondary tempering；Described gradient increased temperature step is as follows: first carrying out the first gradient increased temperature, the heating-up time is 0.5-0.8 hour, in furnace temperature
Rising to 425 DEG C, temperature retention time is 0.8-1.2 hour；Then carrying out the second gradient increased temperature, the heating-up time is 0.8-1.2 hour, stove
Temperature is to 800-820 DEG C, and temperature retention time is 1.2-1.5 hour；Carrying out the 3rd gradient increased temperature subsequently, the heating-up time is that 1.8-2.1 is little
Time, furnace temperature is to 1000-1160 DEG C, and temperature retention time is 1.5-1.8 hour；Finally carrying out the 4th gradient increased temperature, the heating-up time is
2.1-2.5 hour, furnace temperature was to 1330-1380 DEG C, and temperature retention time is 1.8-2.1 hour；The purpose so heated up is neodymium-iron-boron
Body can be with crystal grain thinning.Described gradient cooling step is as follows: first carry out the first gradient cooling, and temperature fall time is 0.3-0.5
Hour, furnace temperature 400-420 DEG C, temperature retention time is 0.2-0.3 hour；Finally carrying out the second gradient cooling, temperature fall time is 0.2-
0.3 hour, furnace temperature was less than 150 DEG C, obtained compactness and the high neodymium iron boron magnetic body of HCJ.
Owing to the magnetic property of nd-fe-b permanent magnetic alloy now is relatively low, it is therefore desirable to it is carried out temper, and secondary
Temper can obtain more preferable magnetic property relative to a temper.When nd-fe-b permanent magnetic alloy at a relatively high temperature
During tempering, such as when being tempered for 900 DEG C, in the short time, the rich-Nd phase at corner is handed over to become liquid phase, then 600 DEG C of tempering at crystal boundary
Time, it may occur that eutectic reaction, amount of liquid phase reduces, and composition also can change.If rich Nd liquid phase ingredient optimization can be made
To close to Nd content during ternary eutectic temperature, then can obtain the microscopic structure of beneficially high-coercive force, in the present invention secondary
The temperature of tempering, the tempering of described first time is set in temperature and is 900-1100 DEG C, and air cooling is to furnace temperature；Described second time temperature
Being set in 1300-1400 DEG C, air cooling is to furnace temperature.
Preferably, described gradient increased temperature step is as follows: first gradient increased temperature heat time heating time was 0.6 hour, and furnace temperature rises to
436 DEG C, temperature retention time is 1 hour；Second gradient increased temperature heat time heating time was 1 hour, furnace temperature to 815 DEG C, and temperature retention time is 1.3 little
Time；3rd gradient increased temperature heat time heating time was 2 hours, and furnace temperature to 1080 DEG C, temperature retention time is 1.7 hours；4th gradient increased temperature adds
The heat time is 2.3 hours, and furnace temperature to 1350 DEG C, temperature retention time is 2 hours；Described gradient cooling step is as follows: the first gradient fall
Warm cool time is 0.4 hour, and furnace temperature 413 DEG C, temperature retention time is 0.23 hour；Second gradient cooling is 0.2 little cool time
Time, furnace temperature is less than 150 DEG C.It is 960 DEG C that the tempering of described first time is set in temperature, and air cooling is to furnace temperature；Described second time tempering temperature
Degree is set in 1350 DEG C, and air cooling is to furnace temperature.The neodymium iron boron magnetic body come out of the stove under sintering method in embodiment 1 is carried out remanent magnetism Br, interior
Report coercivity H j, coercivity H b, the detection of maximum magnetic energy product (BH) max.
Present embodiment further discloses a kind of magnetic photo frame using neodymium iron boron to make.As shown in Figures 1 to 4, described
Magnetic photo frame structure includes lamella lucida 13, baffle plate, photo frame, photo 7 and backboard 17；Described lamella lucida 13 is arranged in photo frame；Institute
Stating baffle plate and be located at lamella lucida 13 and backboard 17 centre position, the front of baffle plate is located at by described photo 7.Described photo frame is by left side baffle plate
15, base plate, right-hand apron 16, panel 1, backboard 17 and angled piece 8 form, described left side baffle plate 15, base plate and right-hand apron 16
Join end to end the U-shaped framework of formation, in the front sticking panel 1 of U-shaped framework, the reverse side adhesive back 17 of U-shaped framework；Described right angle
Part 8 is connected with panel 1 by tumbler 9；Described tumbler 9 is arranged at the hypotenuse of angled piece 8, and tumbler 9 is by angled piece 8
Hypotenuse is divided into hypotenuse a81 and hypotenuse b82, and angled piece 8 tumbler 9 front and back overturns for fulcrum, the purpose side of being of this design
The most in use replacement to photo 7；Described panel 1 centre position is provided with lamella lucida 13, is used for placing lamella lucida 13；Institute
That states panel 1 is arranged over two sections of grooves；The radius of curvature of the first paragraph groove III12 of panel 1 and the hypotenuse a81 of angled piece 8
The radius of gyration consistent, the arc length of described groove III12 determines the flip angle of angled piece 8, and second segment groove II11 is used for
Tumbler 9 is installed；Described magnetic photo frame also includes neodymium iron boron magnetic body block 3, neodymium iron boron magnetic body thin slice 31 and manual pulling part 2；By
Magnet in magnetic photo frame uses the neodymium iron boron magnetic body of preparation, the therefore use of this magnetic photo frame under new formula and technique
Life-span is longer.The centre position in backboard 17 front is located at by described neodymium iron boron magnetic body frame；Described neodymium iron boron magnetic body thin slice 31 is located at directly
The hypotenuse b82 of corner fittings 8；Described manual pulling part 2 is located at the lower position outside right-hand apron 16；The shape of described manual pulling part 2
For V-arrangement, centre is with arc transition；The left end of manual pulling part 2 is that hands DIP is put, near the front of panel (1) position；Manually
Being connected with right-hand apron 16 by screw b5 bottom pulling part 2, manual pulling part 2 rotates with screw b5 for the center of circle, the right side of manual pulling part 2
Side end position is connected by screw a4 with neodymium iron boron magnetic body block 33；Described right-hand apron 16 is near manual pulling part 2 and neodymium iron boron
Magnet block 3 junction has sliding tray 6, and described chute 6 is the rotational travel that manual pulling part 2 drives neodymium iron boron magnetic body block 3, this hands
The design of dynamic pulling part 2 facilitates people's replacing for magnetic photo frame.
The operation principle of described magnetic photo frame is as follows:
When photo 7 is put in magnetic photo frame, angled piece 8 is separated with backboard 17, overturn by tumbler 9, turn over
The angle turned is determined by the arc length of panel 1 groove III12, now can put in photo frame by photo 7, be placed in baffle plate front.This
Time buckle angled piece 8, owing to posting neodymium iron boron magnetic body thin slice 31 on the hypotenuse b82 of angled piece 8d, therefore can enter with backboard 17
Row laminating.Owing to being provided with neodymium iron boron magnetic body block 3 on the backboard 17 of magnetic photo frame, therefore magnetic photo frame can be affixed on rigidity table
Face, when needing to change the photo 7 in magnetic photo frame, it is only necessary to carry out overturning the most replaceable by angled piece 8, easy to use.If
Being the replacing needing to carry out magnetic photo frame position, it is only necessary to stir manual pulling part 2, manual pulling part 2 can drive neodymium ferrum
Boron magnet block 3 moves in chute 6, and neodymium iron boron magnetic body block 3 takes away backboard 17 surface, and now magnetic photo frame can be from rigidity table
Face take from.
Embodiment 2
Present embodiment discloses a kind of neodymium iron boron magnetic body, and difference from Example 1 is: the group of described magnet composition
Become Nd:28%, Nb:2.7%, Co:2.8%, Zr:0.23%, Er:10%, Ti:0.1%, B:1.4%, Tm2O3: 2.8%,
Adipic dihydrazide ADH:3%, surplus is Fe.Described gradient increased temperature step is as follows: first carry out the first gradient increased temperature, and the heating-up time is
0.5 hour, furnace temperature rose to 400 DEG C, and temperature retention time is 0.8 hour；Then carrying out the second gradient increased temperature, the heating-up time is 0.8
Hour, furnace temperature to 800 DEG C, temperature retention time is 1.2 hours；Again carrying out the 3rd gradient increased temperature, the heating-up time is 1.8 hours, stove
Temperature is to 1000 DEG C, and temperature retention time is 1.5 hours；Finally carrying out the 4th gradient increased temperature, the heating-up time is 2.1 hours, and furnace temperature is extremely
1330 DEG C, temperature retention time is 1.8 hours；Described gradient cooling step is as follows: first carry out the first gradient cooling, and temperature fall time is
0.3 hour, furnace temperature 400 DEG C, temperature retention time was 0.2 hour；Finally carrying out the second gradient cooling, temperature fall time is 0.2 hour, stove
Temperature is less than 150 DEG C.It is 900 DEG C that the tempering of described first time is set in temperature, and air cooling is to furnace temperature；Described second time temperature sets
In 1300 DEG C, air cooling is to furnace temperature.The neodymium iron boron magnetic body come out of the stove under sintering method in embodiment 2 is carried out remanent magnetism Br, intrinsic coercive
Power Hcj, coercivity H b, the detection of maximum magnetic energy product (BH) max.
Embodiment 3
Present embodiment discloses a kind of neodymium iron boron magnetic body, and difference from Example 1 is: the group of described magnet composition
Become Nd:32%, Nb:2.9%, Co:4%, Zr:0.32%, Er:15%, Ti:0.3%, B:2.1%, Tm2O3: 4%, oneself two
Hydrazides ADH:3.5%, surplus is Fe.Described gradient increased temperature step is as follows: first carry out the first gradient increased temperature, and the heating-up time is
0.8 hour, furnace temperature rose to 450 DEG C, and temperature retention time is 1.2 hours；Carrying out the second gradient increased temperature subsequently, the heating-up time is 1.2
Hour, furnace temperature to 820 DEG C, temperature retention time is 1.5 hours；Again carrying out the 3rd gradient increased temperature, the heating-up time is 2.1 hours, stove
Temperature is to 1160 DEG C, and temperature retention time is 1.8 hours；Finally carrying out the 4th gradient increased temperature, the heating-up time is 2.5 hours, and furnace temperature is extremely
1380 DEG C, temperature retention time is 2.1 hours；Described gradient cooling step is as follows: first carry out the first gradient cooling, and temperature fall time is
0.5 hour, furnace temperature 420 DEG C, temperature retention time was 0.3 hour；Finally carrying out the second gradient cooling, temperature fall time is 0.3 hour, stove
Temperature is less than 150 DEG C.It is 1100 DEG C that the tempering of described first time is set in temperature, and air cooling is to furnace temperature；Described second time temperature sets
Due to 1400 DEG C, air cooling is to furnace temperature.The neodymium iron boron magnetic body come out of the stove under sintering method in embodiment 3 is carried out remanent magnetism Br, intrinsic rectify
Stupid power Hcj, coercivity H b, the detection of maximum magnetic energy product (BH) max.
Table 1 is test coefficient vs table
By table 1 to three embodiments, in the case of example 1 the remanent magnetism of neodymium iron boron magnetic body, HCJ,
Mutually balance between coercivity, maximum magnetic energy product, can well be applied in described magnetic photo frame product.
Described above illustrate and describes the preferred embodiments of the present invention, as previously mentioned, it should be understood that the present invention not office
Be limited to form disclosed herein, be not to be taken as the eliminating to other embodiments, and can be used for other combinations various, amendment and
Environment, and can be changed by above-mentioned teaching or the technology of association area or knowledge in invention contemplated scope described herein
Dynamic.And the change that those skilled in the art are carried out and change are without departing from the spirit and scope of the present invention, the most all should be appended by the present invention
In scope of the claims.
Claims (10)
1. a neodymium iron boron magnetic body, it is characterised in that: described magnet food ingredient consist of Nd:28-32%, Nb:2.7～
2.9%, Co:2.8～4%, Zr:0.23～0.32%, Er:10～15%, Ti:0.1～0.3%, B:1.4～2.1%,
Tm2O3: 2.8～4%, adipic dihydrazide ADH:3～3.5%, surplus is Fe.
A kind of neodymium iron boron magnetic body the most according to claim 1, it is characterised in that: consisting of of described magnet food ingredient
Nd:30%, Nb:2.8%, Co:3.5%, Zr:0.3%, Er:13%, Ti:0.2%, B:1.8%, Tm2O3: 3.3%, adipyl
Hydrazine ADH:3.25%, surplus is Fe.
3., for a preparation method for the neodymium iron boron magnetic body described in claim 1, the preparation process of this neodymium iron boron magnetic body includes:
Dispensing-melting-hydrogen is broken-shape-sintering, and raw material is put in smelting furnace and is carried out melting by described melting；Described hydrogen is broken is to utilize neodymium
The hydrogen absorption characteristic of ferrum boron, uses the broken machine of hydrogen to carry out the broken operation of hydrogen；Described shaping is to use hydrostatic pressing；It is characterized in that: institute
State sintering method and comprise gradient increased temperature, gradient cooling step, for the first time tempering and second time tempering；Its order be gradient increased temperature-
Gradient cooling step-first time tempering-second time tempering；Described gradient increased temperature step is as follows: first carry out the first gradient increased temperature,
Heating-up time is 0.5-0.8 hour, and furnace temperature rises to 400-450 DEG C, and temperature retention time is 0.8-1.2 hour；Then second is carried out
Gradient increased temperature, the heating-up time is 0.8-1.2 hour, and furnace temperature is to 800-820 DEG C, and temperature retention time is 1.2-1.5 hour；Carry out subsequently
3rd gradient increased temperature, the heating-up time is 1.8-2.1 hour, and furnace temperature is to 1000-1160 DEG C, and temperature retention time is 1.5-1.8 hour；?
After carry out the 4th gradient increased temperature, the heating-up time is 2.1-2.5 hour, and furnace temperature is to 1330-1380 DEG C, and temperature retention time is 1.8-2.1
Hour；Described gradient cooling step is as follows: first carry out the first gradient cooling, and temperature fall time is 0.3-0.5 hour, furnace temperature 400-
420 DEG C, temperature retention time is 0.2-0.3 hour；Finally carrying out the second gradient cooling, temperature fall time is 0.2-0.3 hour, and furnace temperature is low
In 150 DEG C, obtain compactness and the high neodymium iron boron magnetic body of HCJ.
A kind of neodymium iron boron magnetic body the most according to claim 3, it is characterised in that: described first time temperature is set in temperature
Degree is for 900-1100 DEG C, and air cooling is to furnace temperature.
A kind of neodymium iron boron magnetic body the most according to claim 3, it is characterised in that: described second time temperature is set in
1300-1400 DEG C, air cooling is to furnace temperature.
6. the magnetic photo frame that the neodymium iron boron magnetic body described in claim 1 makes, described magnetic photo frame structure includes lamella lucida
(13), baffle plate, photo frame, photo (7) and backboard (17)；Described lamella lucida (13) is arranged in photo frame；Described baffle plate is located at transparent
Plate (13) and backboard (17) centre position, the front of baffle plate is located at by described photo (7), it is characterised in that: in described magnetic photo frame
Also include neodymium iron boron magnetic body block (3), neodymium iron boron magnetic body thin slice (31) and manual pulling part (2)；Described photo frame by left side baffle plate (15),
Base plate, right-hand apron (16), panel (1), backboard (17) and angled piece (8) composition；Described left side baffle plate (15), base plate and right side
Baffle plate (16) joins end to end and forms U-shaped framework, in the front sticking panel (1) of U-shaped framework, the reverse side adhesive back of U-shaped framework
(17)；Described angled piece (8) is connected with panel (1) by tumbler (9)；Backboard (17) front is located at by described neodymium iron boron magnetic body frame
Centre position；Described neodymium iron boron magnetic body thin slice (31) is located at the hypotenuse of angled piece (8)；Described manual pulling part (2) is located at right side
The lower position in baffle plate (16) outside.
Magnetic photo frame the most according to claim 6, it is characterised in that: described tumbler (9) is arranged on the oblique of angled piece (8)
At limit；The hypotenuse of angled piece (8) is divided into hypotenuse a (81) and hypotenuse b (82) by tumbler (9), and angled piece (8) is with tumbler (9)
Front and back overturn for fulcrum.
Magnetic photo frame the most according to claim 6, it is characterised in that: described panel (1) be arranged over two sections of grooves；Face
The radius of first paragraph groove III (12) of plate (1) is consistent with the rotation radius of curvature of angled piece (8) hypotenuse a (81).
Magnetic photo frame the most according to claim 6, it is characterised in that: described manual pulling part (2) be shaped as V-arrangement, manually
The bottom of pulling part (2) is connected with right-hand apron (16) by screw b (5), and manual pulling part (2) is that the center of circle rotates with screw b (5).
Magnetic photo frame the most according to claim 6, it is characterised in that: described right-hand apron (16) is near manual pulling part (2)
Sliding tray (6) is had with neodymium iron boron magnetic body block (3) junction；Described chute (6) is that manual pulling part (2) drives neodymium iron boron magnetic body block
(3) rotational travel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052243.8A CN108236260A (en) | 2016-08-29 | 2016-08-29 | The magnetic photo frame that a kind of neodymium iron boron magnetic body makes |
| CN201610771536.2A CN106169345B (en) | 2016-08-29 | 2016-08-29 | A kind of preparation method of neodymium iron boron magnetic body |
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| CN201610771536.2A CN106169345B (en) | 2016-08-29 | 2016-08-29 | A kind of preparation method of neodymium iron boron magnetic body |
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| CN201810052243.8A Division CN108236260A (en) | 2016-08-29 | 2016-08-29 | The magnetic photo frame that a kind of neodymium iron boron magnetic body makes |
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| CN201610771536.2A Active CN106169345B (en) | 2016-08-29 | 2016-08-29 | A kind of preparation method of neodymium iron boron magnetic body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133800A (en) * | 2017-12-27 | 2018-06-08 | 宁波招宝磁业有限公司 | A kind of high-strength tenacity neodymium iron boron magnetic body and preparation method thereof |
| CN110335733A (en) * | 2019-06-05 | 2019-10-15 | 宁波合力磁材技术有限公司 | A kind of neodymium iron boron magnetic body resistant to high temperature and preparation method thereof |
| CN110504077A (en) * | 2019-07-19 | 2019-11-26 | 宁波可可磁业股份有限公司 | A kind of Nd-Fe-B permanent magnet material and preparation method thereof |
| CN112179137A (en) * | 2020-09-23 | 2021-01-05 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000100609A (en) * | 1998-09-18 | 2000-04-07 | Sumitomo Special Metals Co Ltd | Material alloy for nanocomposite rare earth magnets and manufacture thereof |
| CN101872668A (en) * | 2009-04-23 | 2010-10-27 | 北京中科三环高技术股份有限公司 | Sintered NdFeB rear-earth permanent magnet with fine magnetization characteristic and manufacturing method thereof |
| CN103572083A (en) * | 2012-07-18 | 2014-02-12 | 三环瓦克华（北京）磁性器件有限公司 | Sintering method for neodymium iron boron magnet |
| CN104143403A (en) * | 2014-07-31 | 2014-11-12 | 宁波科田磁业有限公司 | Manufacturing method for improving magnetic performance of sintered neodymium-iron-boron magnet |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2434985Y (en) * | 2000-08-15 | 2001-06-20 | 钟志良 | Multi-layer picture frame with movable side frame |
| CN100446135C (en) * | 2004-04-01 | 2008-12-24 | 华硕电脑股份有限公司 | Magnetic switch device |
| CN2819959Y (en) * | 2005-09-20 | 2006-09-27 | 广东金冠科技发展有限公司 | Folding embedded mirror frame |
| CN201200199Y (en) * | 2008-06-20 | 2009-03-04 | 吴蓉 | Magnetic digital photo frame |
| CN202567376U (en) * | 2012-04-28 | 2012-12-05 | 陈明兴 | Photo frame |
| CN104622118A (en) * | 2015-01-21 | 2015-05-20 | 上海朗爱纸制品有限公司 | Magnetic attraction type photo frame |
| CN205234110U (en) * | 2015-11-19 | 2016-05-18 | 重庆市书林工艺品制作部 | Utilize magnetism to change wall built -up photo holder frame of photograph |
| CN205493343U (en) * | 2015-12-30 | 2016-08-24 | 深圳市优力优磁性科技有限公司 | Magnetism photo holder frame |
-
2016
- 2016-08-29 CN CN201810052243.8A patent/CN108236260A/en active Pending
- 2016-08-29 CN CN201610771536.2A patent/CN106169345B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000100609A (en) * | 1998-09-18 | 2000-04-07 | Sumitomo Special Metals Co Ltd | Material alloy for nanocomposite rare earth magnets and manufacture thereof |
| CN101872668A (en) * | 2009-04-23 | 2010-10-27 | 北京中科三环高技术股份有限公司 | Sintered NdFeB rear-earth permanent magnet with fine magnetization characteristic and manufacturing method thereof |
| CN103572083A (en) * | 2012-07-18 | 2014-02-12 | 三环瓦克华（北京）磁性器件有限公司 | Sintering method for neodymium iron boron magnet |
| CN104143403A (en) * | 2014-07-31 | 2014-11-12 | 宁波科田磁业有限公司 | Manufacturing method for improving magnetic performance of sintered neodymium-iron-boron magnet |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133800A (en) * | 2017-12-27 | 2018-06-08 | 宁波招宝磁业有限公司 | A kind of high-strength tenacity neodymium iron boron magnetic body and preparation method thereof |
| CN110335733A (en) * | 2019-06-05 | 2019-10-15 | 宁波合力磁材技术有限公司 | A kind of neodymium iron boron magnetic body resistant to high temperature and preparation method thereof |
| CN110335733B (en) * | 2019-06-05 | 2021-11-09 | 宁波合力磁材技术有限公司 | High-temperature-resistant neodymium-iron-boron magnet and preparation method thereof |
| CN110504077A (en) * | 2019-07-19 | 2019-11-26 | 宁波可可磁业股份有限公司 | A kind of Nd-Fe-B permanent magnet material and preparation method thereof |
| CN112179137A (en) * | 2020-09-23 | 2021-01-05 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
| CN112179137B (en) * | 2020-09-23 | 2022-08-23 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
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|---|---|
| CN108236260A (en) | 2018-07-03 |
| CN106169345B (en) | 2018-05-01 |
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