CN107150125A - A kind of method of manufacture 3D metal powder materials - Google Patents
A kind of method of manufacture 3D metal powder materials Download PDFInfo
- Publication number
- CN107150125A CN107150125A CN201710408422.6A CN201710408422A CN107150125A CN 107150125 A CN107150125 A CN 107150125A CN 201710408422 A CN201710408422 A CN 201710408422A CN 107150125 A CN107150125 A CN 107150125A
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- Prior art keywords
- feed
- gas
- argon gas
- wire
- plasma gun
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Classifications
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
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Abstract
The invention discloses a kind of method of manufacture 3D metal powder materials, it comprises the following steps：Step 1), device assembling；Step 2), start processing：Raw material thread head in wire-feed motor is inserted into interface in many rifle positions and wire feed synthesis feed-in mechanism；Start water-cooling circulating system；Start argon gas background and resettle pump for after system background impurity removal gas, closing argon gas background resettles pump；Open argon gas and reclaim cooling compression system；Drive tonifying Qi steel cylinder simultaneously；Start plasma gun source and regulation power supply makes current balance type, adjust each rifle air pressure balance；Start wire-feed motor；The salmon pink injection uniform light degree ejected from the observation window on tank body, it is stable, collection powder box is opened, 3D metal powder materials are collected.The manufacture of metal 3D powder is greatly simplify using this method, plug and play is truly realized, that is, it is to walk to close, and raw material is easily and flexibly changed at any time, compact flexible building form can really realize the same room and seamless feed with metal 3D printing equipment.
Description
Technical field
The present invention relates to metal powder material processing technique field, more particularly to a kind of method of manufacture 3D metal powder materials.
Background technology
Block stock is predominantly put into smelting furnace by the manufacturing technology of current 3D metal powder materials, is molten into liquid, passes through pressurization
Liquid is set to introduce atomizer by water conservancy diversion tubule, the liquid metal that inertia high pressure argon gas injection catheter is introduced produces atomization effect
Really, so that atomized metallic particles.There is following technical problem in it：Smelting furnace fusing metal block stock time length, energy consumption
It is high；Once heating source is interrupted, liquid metal solidification can not be cleared up；Transition material kind complex procedures, need to change crucible；Can not be real
Scene is direct-connected with metal 3D printer.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of method of manufacture 3D metal powder materials.
The present invention provides a kind of method of manufacture 3D metal powder materials, and it comprises the following steps：
Step 1), device assembling：
Wire-feed motor is synthesized to the upper sealing joint connection of feed-in mechanism with many rifle positions and wire feed；Many rifle position wire feeds synthesize feed-in
Mechanism include it is some plasma gun, it is some to set at equal intervals plasma gun edge is annular, it is some plasma gun
Muzzle center line intersection point is power centrostigma；Wire feed opening's edge vertical direction is corresponding with the power centrostigma position；
Plasma gun source is connected the gun breech sealing joint of plasma gun with some；Plasma gun source is provided with
Power supply and gas source interface；
The bottom suitable for reading that feed-in mechanism is synthesized with many rifle positions and wire feed with flat mouth flange of tank body is docked, and uses silica gel
Pad sealing；Observation window is provided with tank body；The lower mouth for collecting powder box and tank body is tightly connected；
Flange between the left end and tank body of ar gas environment gas buffer tank is connected and uses silicagel pad to seal, right-hand member and argon
Gas is welded between reclaiming cooling compression system by pressure pipeline, lower end and argon gas background resettle pump by hand stop valve and
Pressure pipeline is connected；
Argon gas is reclaimed into cooling compression system to be connected by sealing pipeline with the gas source interface in plasma gun source；
Tonifying Qi steel cylinder is reclaimed into cooling compression system by hand stop valve, pressure-reducing valve and pressure pipeline and argon gas to be connected；
Water-cooling circulating system is synthesized into feed-in mechanism with many rifle positions and wire feed, ar gas environment gas buffer tank, collection powder box and
Tank body is connected；
Step 2), start processing：
Raw material thread head in wire-feed motor is inserted into interface in many rifle positions and wire feed synthesis feed-in mechanism；After system power supply, open
Dynamic water-cooling circulating system, makes whole system be in cooled state together；Start argon gas background and resettle pump for system background impurity removal gas
After body, close argon gas background and resettle pump；Open argon gas and reclaim cooling compression system, dynamic is provided for system tank body by gas circuit
Gas stream and pressure of foundation, while opening the outlet pressure that tonifying Qi steel cylinder reclaims cooling compression system for system make-up gas to argon gas
Preset value is reached, tonifying Qi steel cylinder is closed；Start plasma gun source and regulation power supply makes current balance type, adjust each rifle air pressure and put down
Weighing apparatus；Start wire-feed motor；The salmon pink injection uniform light degree ejected from the observation window on tank body, it is stable, open
Collect powder box, collect 3D metal powder materials.
Further, many rifle positions and wire feed synthesis feed-in mechanism include：Three plasma guns, it is described three wait from
Sub- welding gun is along annular 120 ° of settings at equal intervals, and downwards, with horizontal direction in 60 ° of angles, three the muzzle of plasma gun for muzzle
Center line intersection point is power centrostigma.
Further, the collection powder box is the drawer type screening pond of flanged lock sealing, its built-in multistorey strainer mesh vibration
Formula sifter, upper end is connected with the lower tank flange, is sealed using silicagel pad, and is provided with manual relief valve.
Further, the wire feed rate of wire-feed motor is set to 90~110mm/min.
Further, the muzzle outlet pressure of the plasma gun is 0.3~0.5MPa；Rifle inverter voltage is
DC112V；Single rifle electric current is 55~65A.
Further, the cooling water temperature of the water-cooling circulating system is 20~25 DEG C, and pressure is 3~5MPa, and flow velocity is
40~70 liters/min.
Further, the preset value that argon gas reclaims the outlet pressure of cooling compression system is 0.4~0.6MPa.
Further, it is described to open in mach process, start argon gas background and resettle pump for system background impurity removal gas
After body 3~6 minutes, turn off argon gas background and resettle pump.
The present invention provides a kind of method of manufacture 3D metal powder materials, and this method uses plasma gun, plasma welding gun
Mouth temperature is up to 8000 DEG C, it is sufficient to melt various metals；Protective gas is argon gas, in turn ensure that the purity of raw material；Gas injection
Mode agree with atomization needed for condition；The controllable stable blowing direction of multiple gun formation orientation；Automatic wire center feed-in mode is carried
For stably and controllable feedstock transportation；Plug and play, that is, stop to walk, at any time quick-replaceable raw material.Greatly simplified using this method
The manufacture of metal 3D powder, is truly realized plug and play, that is, it is to walk to close, and raw material is easily and flexibly changed at any time, tightly
The flexible building form that gathers can really realize same room and the seamless feed with metal 3D printing equipment.
Brief description of the drawings
Structural representation in a kind of method for manufacture 3D metal powder materials that Fig. 1 provides for the present invention after device assembling.
Description of reference numerals：
1- wire-feed motors
2- plasma guns source
The many rifle positions of 3- and wire feed synthesis feed-in mechanism
4- water-cooling circulating systems
5- ar gas environment gas buffer tanks
6- argon gas reclaims cooling compression system
7- argon gas backgrounds resettle pump
8- collection powder boxes
9- tank bodies
10- tonifying Qi steel cylinders
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
In a kind of specific embodiment, the invention provides a kind of method of manufacture 3D metal powder materials, its feature exists
In comprising the following steps：
Step 1), device assembling, apparatus structure is as shown in Figure 1：
Wire-feed motor 1 is synthesized to the upper sealing joint connection of feed-in mechanism 3 with many rifle positions and wire feed；Many rifle position wire feed synthesis feedbacks
Enter mechanism 3 including some plasma gun, it is some that plasma gun is set at equal intervals along annular, it is some plasma gun
Muzzle center line intersection point be power centrostigma；Wire feed opening's edge vertical direction is corresponding with the power centrostigma position；
Plasma gun source 2 is connected the gun breech sealing joint of plasma gun with some；Plasma gun source 2 is set
There are power supply and gas source interface；
The bottom suitable for reading that feed-in mechanism 3 is synthesized with many rifle positions and wire feed with flat mouth flange of tank body 9 is docked, and uses silicon
Rubber cushion is sealed；Observation window is provided with tank body 9；The lower mouth for collecting powder box 8 and tank body 9 is tightly connected；
By flange between the left end and tank body 9 of ar gas environment gas buffer tank 5 connect and use silicagel pad seal, right-hand member with
Argon gas is welded between reclaiming cooling compression system 6 by pressure pipeline, and lower end resettles pump 7 by manual shutoff with argon gas background
Valve and pressure pipeline connection；
Argon gas is reclaimed into cooling compression system 6 to be connected by sealing pipeline with the gas source interface in plasma gun source 2；
Tonifying Qi steel cylinder 10 is reclaimed into the cooling phase of compression system 6 by hand stop valve, pressure-reducing valve and pressure pipeline and argon gas
Even；
Water-cooling circulating system 4 is synthesized into feed-in mechanism 3 with many rifle positions and wire feed, ar gas environment gas buffer tank 5 collects powder box
8 are connected with tank body 9；
Step 2), start processing：
Raw material thread head in wire-feed motor 1 is inserted into interface in many rifle positions and wire feed synthesis feed-in mechanism 3；After system power supply,
Start water-cooling circulating system 4, whole system is in cooled state together；Start argon gas background and resettle pump 7 for system background impurities removal
After matter gas, close argon gas background and resettle pump 7；Open argon gas and reclaim cooling compression system 6, be system tank body 9 by gas circuit
Dynamic gas stream and pressure of foundation are provided, while drive tonifying Qi steel cylinder 10 reclaims cooling compression system for system make-up gas to argon gas
6 outlet pressure reaches preset value, closes tonifying Qi steel cylinder 10；Start plasma gun source 2 and regulation power supply makes current balance type, adjust
Save each rifle air pressure balance；Start wire-feed motor 1；The salmon pink injection uniform light degree ejected from the observation window on tank body 9,
It is stable, collection powder box 8 is opened, 3D metal powder materials are collected.
Preferably, many rifle positions and wire feed synthesis feed-in mechanism 3 include：Three plasma guns, it is described three wait from
Sub- welding gun is along annular 120 ° of settings at equal intervals, and downwards, with horizontal direction in 60 ° of angles, three the muzzle of plasma gun for muzzle
Center line intersection point is power centrostigma.
Further, the collection powder box 8 is the drawer type screening pond of flanged lock sealing, its built-in multistorey strainer mesh vibration
Formula sifter, upper end is connected with the flange of lower tank 9, is sealed using silicagel pad, and be provided with manual relief valve.
It is used as the preferred scheme of the present invention：
The wire feed rate of wire-feed motor is set to 90~110mm/min.
The muzzle outlet pressure of the plasma gun is 0.3~0.5MPa；Rifle inverter voltage is DC112V；Single rifle
Electric current is 55~65A.
The cooling water temperature of the water-cooling circulating system be 20~25 DEG C, pressure be 3~5MPa, flow velocity be 40~70 liters/
min。
The preset value that argon gas reclaims the outlet pressure of cooling compression system is 0.4~0.6MPa.
Described to open in mach process, startup argon gas background resettles pump and is system background impurity removal gas 3~6 minutes
Afterwards, turn off argon gas background and resettle pump.
It is above-mentioned in manufacture method, the effect of each several part to be as follows in device that the present invention is provided：
Wire-feed motor 1 is used to ensure that wire stock sends into system with the speed of stable, continuously adjustabe；
Plasma gun source 2 is used to provide thermal source and gas spout；
Many rifle positions and wire feed synthesis feed-in mechanism 3 are used to provide passage and with realizing cooling protection after water-cooling circulating system 4；
The sealing gasket that water-cooling circulating system 4 is used in the cooling for providing system, protection system, reduction environment temperature is accelerated into
The cooling of powder；
Ar gas environment gas buffer tank 5 is used to form gaseous environment buffering area, and isolates dust area tank body 9 and argon gas recovery
Cooling compression system 6, argon gas background resettle pump 7；
Argon gas, which reclaims cooling compression system 6, is used for saving gas, recycles, process is reached dynamic stability；
Argon gas background, which resettles pump 7, to be used to extract low vacuum emptying foreign gas during first task, by being filled with working medium gas
Body (Ar) reaches the effect of purifying background gas environment；
Collection powder box 8 is used to collect powder, then can be further implemented as using the drawer type screening pond of flanged lock sealing
The screening separation of powder particles size；
Tank body 9 is used to window can be set on inert gas (Ar/He) background for providing into powder process, tank body 9, passes through observation
Window Observable powdering state is with sharp control；
Tonifying Qi steel cylinder 10 is used to supplement consumption gas.
The course of work of method that the present invention provides manufacture 3D metal powder materials is：With identical power output and gas flow
It is many plasma gun be then oriented more at feed-in raw material silk, while silk is melted by multiple gun thermal power, by multiple gun
Centripetal argon gas is blown and produces atomization mouth in the same direction.Each rifle power and argon flow amount are adjusted, makes atomizing effect optimal.Pre-establishing
Argon gas background environment in, the metal powder grain directed movement process of atomization is cooled and shaped, and is fallen as in collection powder box, through multi-layer vibration
Screening obtains target powder.
The detailed process of step 2 can be as follows：
Raw material thread head in wire-feed motor 1 is inserted after interface in many rifle positions and wire feed synthesis feed-in mechanism 3, system power supply,
Start water-cooling circulating system 4, whole system is in cooled state together, start argon gas background and resettle pump 7 for system background impurities removal
After matter gas 5 minutes, close argon gas background and resettle pump 7, it is system canister to open argon gas and reclaim cooling compression system 6 by gas circuit
Body 9 provides dynamic gas stream and pressure of foundation, while drive tonifying Qi steel cylinder 10 reclaims cooling pressurization for system make-up gas to argon gas
The outlet pressure of system 6 reaches 0.5MPa, closes tonifying Qi steel cylinder 10, starts the plasma gun source 2 and regulation power supply makes electricity
Mobile equilibrium (57A), adjusts each rifle air pressure balance (0.4MPa), starts wire-feed motor 1,100mm/min is set to, from tank body 9
The salmon pink injection uniform light degree that observation window observation is ejected, stable, drawing-out type drawer formula screening pond is sieved into powder, can
How much can be shut down at any time depending on raw material thread.Shutdown order stops plasma gun source 2 to stop wire-feed motor 1, stops argon gas and reclaims cooling pressurization
System 6, stops water-cooling circulating system 4, stops drawer type screening pond, you can pond is screened by drawer type, after upper manual relief valve pressure release
Take powder.
The present invention provides a kind of method of manufacture 3D metal powder materials, and this method uses plasma gun, plasma welding gun
Mouth temperature is up to 8000 DEG C, it is sufficient to melt various metals；Protective gas is argon gas, in turn ensure that the purity of raw material；Gas injection
Mode agree with atomization needed for condition；The controllable stable blowing direction of multiple gun formation orientation；Automatic wire center feed-in mode is carried
For stably and controllable feedstock transportation；Plug and play, that is, stop to walk, at any time quick-replaceable raw material.Greatly simplified using this method
The manufacture of metal 3D powder, is truly realized plug and play, that is, it is to walk to close, and raw material is easily and flexibly changed at any time, tightly
The flexible building form that gathers can really realize same room and the seamless feed with metal 3D printing equipment.
A kind of method of manufacture 3D metal powder materials provided by the present invention is described in detail above.It is used herein
Specific case is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands
The method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not departing from this
On the premise of inventive principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the present invention
In scope of the claims.
Claims (8)
1. a kind of method of manufacture 3D metal powder materials, it is characterised in that comprise the following steps：
Step 1), device assembling：
Wire-feed motor is synthesized to the upper sealing joint connection of feed-in mechanism with many rifle positions and wire feed；Many rifle position wire feed synthesis feed-in mechanisms
It is some that plasma gun is set at equal intervals along annular including some plasma gun, some muzzle plasma gun
Center line intersection point is power centrostigma；Wire feed opening's edge vertical direction is corresponding with the power centrostigma position；
Plasma gun source is connected the gun breech sealing joint of plasma gun with some；Plasma gun source is provided with power supply
And gas source interface；
The bottom suitable for reading that feed-in mechanism is synthesized with many rifle positions and wire feed with flat mouth flange of tank body is docked, and it is close using silicagel pad
Envelope；Observation window is provided with tank body；The lower mouth for collecting powder box and tank body is tightly connected；
Flange between the left end and tank body of ar gas environment gas buffer tank is connected and uses silicagel pad to seal, right-hand member is returned with argon gas
Welded between receipts cooling compression system by pressure pipeline, lower end resettles pump with argon gas background and passes through hand stop valve and pressure
Pipeline is connected；
Argon gas is reclaimed into cooling compression system to be connected by sealing pipeline with the gas source interface in plasma gun source；
Tonifying Qi steel cylinder is reclaimed into cooling compression system by hand stop valve, pressure-reducing valve and pressure pipeline and argon gas to be connected；
Water-cooling circulating system is synthesized into feed-in mechanism, ar gas environment gas buffer tank, collection powder box and tank body with many rifle positions and wire feed
It is connected；
Step 2), start processing：
Raw material thread head in wire-feed motor is inserted into interface in many rifle positions and wire feed synthesis feed-in mechanism；After system power supply, start water
SAPMAC method system, makes whole system be in cooled state together；Start argon gas background and resettle pump for after system background impurity removal gas,
Close argon gas background and resettle pump；Open argon gas and reclaim cooling compression system, dynamic gas is provided for system tank body by gas circuit
Stream and pressure of foundation, reach while driving tonifying Qi steel cylinder for the outlet pressure that system make-up gas to argon gas reclaims cooling compression system
Preset value, closes tonifying Qi steel cylinder；Start plasma gun source and regulation power supply makes current balance type, adjust each rifle air pressure balance；Open
Dynamic wire-feed motor；The salmon pink injection uniform light degree ejected from the observation window on tank body, it is stable, open collection powder
Box, collects 3D metal powder materials.
2. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that many rifle positions and wire feed synthesis
Feed-in mechanism includes：Three plasma guns, described three are at equal intervals set plasma gun for 120 ° along annular, and muzzle is downward,
With horizontal direction in 60 ° of angles, three be power centrostigma the muzzle center line intersection point of plasma gun.
3. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that the collection powder box is flanged lock
The drawer type screening pond of tightening seal, its built-in multistorey strainer mesh oscillatory type sifter, upper end is connected with the lower tank flange, used
Silicagel pad is sealed, and is provided with manual relief valve.
4. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that the wire feed rate of wire-feed motor is set
For 90~110mm/min.
5. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that the muzzle of the plasma gun
Outlet pressure is 0.3~0.5MPa；Rifle inverter voltage is DC112V；Single rifle electric current is 55~65A.
6. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that the water-cooling circulating system it is cold
But coolant-temperature gage is 20~25 DEG C, and pressure is 3~5MPa, and flow velocity is 40~70 liters/min.
7. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that argon gas reclaims cooling compression system
Outlet pressure preset value be 0.4~0.6MPa.
8. the method for manufacture 3D metal powder materials according to claim 1, it is characterised in that described to open mach process
In, start argon gas background and resettle pump for system background impurity removal gas after 3~6 minutes, turn off argon gas background and resettle pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710408422.6A CN107150125A (en) | 2017-06-02 | 2017-06-02 | A kind of method of manufacture 3D metal powder materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710408422.6A CN107150125A (en) | 2017-06-02 | 2017-06-02 | A kind of method of manufacture 3D metal powder materials |
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| CN107150125A true CN107150125A (en) | 2017-09-12 |
Family
ID=59796388
Family Applications (1)
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| CN201710408422.6A Pending CN107150125A (en) | 2017-06-02 | 2017-06-02 | A kind of method of manufacture 3D metal powder materials |
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| US5707419A (en) * | 1995-08-15 | 1998-01-13 | Pegasus Refractory Materials, Inc. | Method of production of metal and ceramic powders by plasma atomization |
| CN105057689A (en) * | 2015-08-19 | 2015-11-18 | 山西卓锋钛业有限公司 | Device and method for preparing superfine micro-spherical titanium powder for 3D printing |
| CN105562700A (en) * | 2015-12-31 | 2016-05-11 | 龙岩紫荆创新研究院 | Plasma preparation method of spherical titanium powder for 3D printing |
| CN105618771A (en) * | 2016-01-29 | 2016-06-01 | 苏州英纳特纳米科技有限公司 | Radio frequency plasma preparation method and device for micro spherical titanium powder |
| CN205414417U (en) * | 2016-03-25 | 2016-08-03 | 湖南久泰冶金科技有限公司 | Device of plasma atomizing preparation high performance powder for vibration material disk |
| CN106216702A (en) * | 2016-07-21 | 2016-12-14 | 中国有色桂林矿产地质研究院有限公司 | A kind of spherical titanium or the preparation method of Titanium Powder |
| CN106378460A (en) * | 2016-09-22 | 2017-02-08 | 成都优材科技有限公司 | Plasma atomization method and apparatus for preparing pure titanium or titanium alloy powder |
-
2017
- 2017-06-02 CN CN201710408422.6A patent/CN107150125A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707419A (en) * | 1995-08-15 | 1998-01-13 | Pegasus Refractory Materials, Inc. | Method of production of metal and ceramic powders by plasma atomization |
| CN105057689A (en) * | 2015-08-19 | 2015-11-18 | 山西卓锋钛业有限公司 | Device and method for preparing superfine micro-spherical titanium powder for 3D printing |
| CN105562700A (en) * | 2015-12-31 | 2016-05-11 | 龙岩紫荆创新研究院 | Plasma preparation method of spherical titanium powder for 3D printing |
| CN105618771A (en) * | 2016-01-29 | 2016-06-01 | 苏州英纳特纳米科技有限公司 | Radio frequency plasma preparation method and device for micro spherical titanium powder |
| CN205414417U (en) * | 2016-03-25 | 2016-08-03 | 湖南久泰冶金科技有限公司 | Device of plasma atomizing preparation high performance powder for vibration material disk |
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Application publication date: 20170912 |