CN109402503A - A kind of novel high wear-resistant scraper plate and its manufacturing method - Google Patents
A kind of novel high wear-resistant scraper plate and its manufacturing method Download PDFInfo
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- CN109402503A CN109402503A CN201811238111.0A CN201811238111A CN109402503A CN 109402503 A CN109402503 A CN 109402503A CN 201811238111 A CN201811238111 A CN 201811238111A CN 109402503 A CN109402503 A CN 109402503A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The present invention relates to scraper plate technical fields, disclose a kind of novel high wear-resistant scraper plate and its manufacturing method, the mass percent of its chemical component composition and each component are as follows: C:0.70~0.95%, Si :≤0.4%, Mn:9.0~10.5%, Cr:2.0~2.4%, Mo:0.25~0.35%, V:0.3~0.45%, surplus are Fe and inevitable impurity.The scraper plate satisfactory mechanical property, tensile strength >=700MPa, yield strength >=420MPa, elongation after fracture >=15%, Impact energy Ak v >=120J, hardness HB180~250 after water-tenacity treatment, HV >=500 after the shock peening of surface layer, wear rate≤15.57 × 10‑6mm3/N·m.The scraper plate has high tenacity, its surface occurs to be plastically deformed under low impact loading in and induces processing hardening, to have high rigidity, high-wearing feature, the loss as caused by abrasion when effectively alleviating work, to improve the service life of scraper plate, the service life of the scraper plate doubles above than traditional 40Mn2 scraper plate service life.And this scrapes board fabrication method and heat treatment process is simple, also reduces costs for production.
Description
Technical field
The present invention relates to scraper plate technical fields, more particularly to a kind of novel high wear-resistant scraper plate and its manufacturing method.
Background technique
Drag conveyor plays an important role in modernization coal mining technique, is that the materials such as coal, gangue are indispensable
Means of transport, while being also that coalcutter is rely the track of operation.Scraper chain fortune when drag conveyor works, inside intermediate channel
Dynamic traction scraper plate movement, the materials such as coal, gangue form movement under the motive force of scraper plate, complete the transport of material.Statistics
Statistics indicate that drag conveyor failure rate accounts for about 50% or more of total accident in the principal element for influencing Homes Using TV.Due to coal,
Spoil or ore and scraper plate and chain are big in intermediate channel resistance of taxing, and abrasion is extremely serious, even unloaded, power also reaches
30%~40%.In work, scraper plate is on the one hand and sliding friction occurs for middle plate, ledge, and one side is again and sliding mill occurs for material
Wipe, while the static state that generates and dynamic load when also subject to because driving material to travel forward, according to incompletely statistics, China it is annual because
There are about 50-60 ten thousand for the scraper plate of wear-out failure, in addition the space under mine is limited, replace and repair extremely inconvenient, maintenance down
Caused loss is every year up to 10,000,000,000 yuan or more.Therefore, the abrasive resistance of scraper plate not only seriously affects the progress of production, but also
Seriously affect the cost of production.
The material of scraper plate is based on 40Mn2 at present, and chemical component is C:0.35~0.45%, and Si:0.20~
0.40%, Mn:1.60~1.80%, P :≤0.030%, S :≤0.030%, performance indicator are as follows: tensile strength >=800MPa is bent
Take intensity >=620MPa, elongation after fracture >=10%, Impact energy Ak v >=50J, integral quenching hardness HB260~320, both ends of the surface
Hardness HB400~450 after quenching.In order to improve the wear-resisting property of scraper plate, need to improve scraper plate material, to be allowed to in
Bottom plate is consistent with the service life of ledge, to carry out replacement and maintenance operation simultaneously, improves the Homes Using TV of drag conveyor.So new
The development of type wear-resistant scraper is necessary, and can fundamentally solve the above problems.
Summary of the invention
The present invention is intended to provide a kind of novel high wear-resistant scraper plate and its manufacturing method, it is wear-resisting to have solved scraper plate in the prior art
The low problem of performance.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of novel high wear-resistant scraper plate, feature exist
In the mass percent of chemical component composition and each component are as follows: C:0.70~0.95%, Si :≤0.4%, Mn:9.0~
10.5%, Cr:2.0~2.4%, Mo:0.25~0.35%, V:0.3~0.45%, surplus are Fe and inevitable impurity.
Further, the quality percentage that the mass percent of C is 0.71~0.94%, Si in the novel high wear-resistant scraper plate
The mass percent for being 9.01~10.49%, Cr than the mass percent for 0.20~0.39%, Mn is 2.02~2.38%,
The mass percent that the mass percent of Mo is 0.26~0.34%, V is 0.31~0.44%.
Further, the novel high wear-resistant scraper plate, which is characterized in that P and S in the novel high wear-resistant hanging plate
The sum of mass percent is less than or equal to 0.035%.
The present invention also provides a kind of manufacturing methods of novel high wear-resistant scraper plate, which is characterized in that specifically includes following step
It is rapid:
(1) melting: weighing each raw material according to composition proportion each in ontology, and be mixed and put into smelting furnace, melting
At molten metal, smelting temperature is 1550~1580 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature
Degree is 1450~1480 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1180~1250
DEG C and keep the temperature, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: choosing the blanking of suitable length bar, lower good material is heated in Medium Frequency Induction Heating Furnace
After 1180~1250 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, blank after pulling is carried out
Die forging carries out trimming to forging, after forging cooled to room temperature, uses in forging specified position by standard size processing is fixed
Hole.
(5) heat treatment process: being heated to 590~610 DEG C for the slab of scraping of forming with the rate of heat addition of 95~105 DEG C/h,
1.75~2.25h is kept the temperature, then is heated to 1080~1120 DEG C with the rate of heat addition of 145~155 DEG C/h, heat preservation 1.75~
2.25h, it is cooling in water.
Further, the manufacturing method of the novel high wear-resistant scraper plate, which is characterized in that step (3) mesohigh
Soaking time before water dephosphorization process is wall thickness 25mm/h, and the temperature drop that high pressure water dephosphorization generates continuous casting billet is at 10 DEG C or so.
The beneficial effects of the present invention are: the present invention provides a kind of novel high wear-resistant scraper plate and its manufacturing method, the scraper plate
Satisfactory mechanical property, tensile strength >=700MPa, yield strength >=420MPa, elongation after fracture >=15%, Impact energy Ak v >=
120J, hardness HB180~250 after water-tenacity treatment, HV >=500 after the shock peening of surface layer, wear rate≤15.57 × 10-6mm3/
N·m.The scraper plate has high tenacity, and surface occurs to be plastically deformed under low impact loading in and induces processing hardening, from
And there is high rigidity, high-wearing feature, the loss as caused by abrasion when effectively alleviating work, to improve making for scraper plate
It is enhanced about more than once with the service life in service life, the scraper plate than traditional 40Mn2 scraper plate service life.And scraper plate manufacturer
Method and heat treatment process are simple, also reduce costs for production.
Detailed description of the invention
Fig. 1 is the wear rate comparison diagram of novel high wear-resistant scraper plate of the present invention He tradition 40Mn2 scraper plate.
Specific implementation method
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right in conjunction with embodiment in detail below
The present invention is further described.
A kind of embodiment 1: novel high wear-resistant scraper plate, which is characterized in that the quality hundred of its chemical component composition and each component
Point ratio are as follows: C:0.72%, Si:0.26%, Mn:10.43%, Cr:2.33%, Mo:0.27%, V:0.33%, surplus be Fe and
Inevitable impurity.
The manufacturing method of the novel high wear-resistant scraper plate, specifically comprises the following steps:
(1) melting: weighing each raw material according to composition proportion each in ontology, and be mixed and put into smelting furnace, melting
At molten metal, smelting temperature is 1550 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature
Degree is 1450 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1180 DEG C and protects
Temperature, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: choosing the blanking of suitable length bar, lower good material is heated in Medium Frequency Induction Heating Furnace
After 1180 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, die forging is carried out to blank after pulling, it is right
Forging carries out trimming, after forging cooled to room temperature, processes fixing hole hole by standard size in forging specified position.
(5) heat treatment process: being heated to 590 DEG C for the slab of scraping of forming with the rate of heat addition of 95 DEG C/h, keep the temperature 1.75h,
1080 DEG C are heated to the rate of heat addition of 145 DEG C/h again, keeps the temperature 1.75h, cooling in water.
A kind of embodiment 2: novel high wear-resistant scraper plate, which is characterized in that the quality hundred of its chemical component composition and each component
Point ratio are as follows: C:0.79%, Si:0.28%, Mn:10.06%, Cr:2.29%, Mo:0.30%, V:0.44%, surplus be Fe and
Inevitable impurity.
The manufacturing method of the novel high wear-resistant scraper plate, specifically comprises the following steps:
(1) melting: weighing each raw material according to composition proportion each in ontology, and be mixed and put into smelting furnace, melting
At molten metal, smelting temperature is 1580 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature
Degree is 1480 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1250 DEG C and protects
Temperature, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: choosing the blanking of suitable length bar, lower good material is heated in Medium Frequency Induction Heating Furnace
After 1250 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, die forging is carried out to blank after pulling, it is right
Forging carries out trimming, after forging cooled to room temperature, processes fixing hole hole by standard size in forging specified position.
(5) heat treatment process: being heated to 610 DEG C for the slab of scraping of forming with the rate of heat addition of 105 DEG C/h, keep the temperature 2.25h,
1120 DEG C are heated to the rate of heat addition of 155 DEG C/h again, keeps the temperature 2.25h, cooling in water.
A kind of embodiment 3: novel high wear-resistant scraper plate, which is characterized in that the quality hundred of its chemical component composition and each component
Point ratio are as follows: C:0.86%, Si:0.38%, Mn:9.53%, Cr:2.22%, Mo:0.33%, V:0.42%, surplus be Fe and
Inevitable impurity.
The manufacturing method of the novel high wear-resistant scraper plate, specifically comprises the following steps:
(1) melting: weighing each raw material according to composition proportion each in ontology, and be mixed and put into smelting furnace, melting
At molten metal, smelting temperature is 1565 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature
Degree is 1465 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1215 DEG C and protects
Temperature, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: choosing the blanking of suitable length bar, lower good material is heated in Medium Frequency Induction Heating Furnace
After 1215 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, die forging is carried out to blank after pulling, it is right
Forging carries out trimming, after forging cooled to room temperature, processes fixing hole hole by standard size in forging specified position.
(5) heat treatment process: being heated to 600 DEG C for the slab of scraping of forming with the rate of heat addition of 100 DEG C/h, keep the temperature 2h, then
1100 DEG C are heated to the rate of heat addition of 150 DEG C/h, keeps the temperature 2h, cooling in water.
A kind of embodiment 4: novel high wear-resistant scraper plate, which is characterized in that the quality hundred of its chemical component composition and each component
Point ratio are as follows: C:0.91%, Si:0.34%, Mn:9.12%, Cr:2.11%, Mo:0.31%, V:0.40%, surplus be Fe and
Inevitable impurity.
The manufacturing method of the novel high wear-resistant scraper plate, specifically comprises the following steps:
(1) melting: weighing each raw material according to composition proportion each in ontology, and be mixed and put into smelting furnace, melting
At molten metal, smelting temperature is 1560 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature
Degree is 1470 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1220 DEG C and protects
Temperature, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: choosing the blanking of suitable length bar, lower good material is heated in Medium Frequency Induction Heating Furnace
After 1200 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, die forging is carried out to blank after pulling, it is right
Forging carries out trimming, after forging cooled to room temperature, processes fixing hole hole by standard size in forging specified position.
(5) heat treatment process: being heated to 600 DEG C for the slab of scraping of forming with the rate of heat addition of 95 DEG C/h, keep the temperature 2.25h,
1095 DEG C are heated to the rate of heat addition of 155 DEG C/h again, keeps the temperature 2h, cooling in water.
Plate sample is scraped to Examples 1 to 4 novel high wear-resistant and carries out tension test, impact test, hardness test and friction mill
Damage test, acquired results are shown in Table 1.
The mechanical performance of 1. embodiment novel high wear-resistant scraper plate of table
Seen from table 1, tensile strength >=700MPa in 4 groups of embodiments, yield strength >=420MPa, elongation after fracture >=
15%, Impact energy Ak v >=120J, hardness HB180~250 after water-tenacity treatment, HV >=500 after the shock peening of surface layer, wear rate≤
15.57×10-6mm3/N·m。
Wherein, for friction-wear test sample having a size of 10 × 10 × 20mm, test temperature is room temperature, and secondary friction is radius
The GCr15 steel loop of 23mm, abrasive conditions are load 200N, revolution 200r/min, time 2h.Fig. 1 is embodiment novel high wear-resistant
The comparison diagram of scraper plate and tradition 40Mn2 scraper plate wearability.
As seen from Figure 1, the wear rate of novel high wear-resistant scraper plate is more much lower than the wear rate of traditional 40Mn2 scraper plate, novel height
The wear resistance of wear-resistant scraper doubles above than the abrasion resistance performance of traditional 40Mn2 scraper plate.
It is different from the prior art, the novel high wear-resistant scraper plate in the present invention uses whole heat treatment process, according to than tradition
The both ends quenching technical of 40Mn2 scraper plate, reduces production difficulty, while improving the toughness and wearability of scraper plate entirety.This is scraped
Plate satisfactory mechanical property, tensile strength >=700MPa, yield strength >=420MPa, elongation after fracture >=15%, Impact energy Ak v
>=120J, hardness HB180~250 after water-tenacity treatment, HV >=500 after the shock peening of surface layer, wear rate≤15.57 × 10-6mm3/
N·m.The scraper plate has high tenacity, and surface occurs to be plastically deformed under low impact loading in and induces processing hardening, from
And there is high rigidity, high-wearing feature, the loss as caused by abrasion when effectively alleviating work, to improve making for scraper plate
With the service life, the service life of the scraper plate doubles above than traditional 40Mn2 scraper plate service life.And this scrapes board fabrication method
It is simple with heat treatment process, also reduced costs for production.
The foregoing is merely preferred embodiments of the invention, are not intended to limit the scope of the invention, all utilizations
Equivalent structure, equivalent process transformation made by the contents of the present invention, or directly, be used in other related technical areas indirectly,
It is included within the scope of the present invention.
Claims (5)
1. a kind of novel high wear-resistant scraper plate, which is characterized in that the mass percent of its chemical component composition and each component are as follows: C:
0.70~0.95%, Si :≤0.4%, Mn:9.0~10.5%, Cr:2.0~2.4%, Mo:0.25~0.35%, V:0.3~
0.45%, surplus is Fe and inevitable impurity.
2. novel high wear-resistant scraper plate according to claim 1, which is characterized in that the matter of C in the novel high wear-resistant scraper plate
The mass percent that the mass percent that amount percentage is 0.71~0.94%, Si is 0.20~0.39%, Mn is 9.01~
The mass percent of 10.49%, Cr are that the mass percent of 2.02~2.38%, Mo is the quality percentage of 0.26~0.34%, V
Than being 0.31~0.44%.
3. novel high wear-resistant scraper plate according to claim 1, which is characterized in that P and S in the novel high wear-resistant scraper plate
The sum of mass percent is less than or equal to 0.035%.
4. a kind of manufacturing method of novel high wear-resistant scraper plate, which is characterized in that specifically comprise the following steps:
(1) melting: each raw material is weighed according to composition proportion each in ontology, and is mixed and puts into smelting furnace, is melt into gold
Belong to liquid, smelting temperature is 1550~1580 DEG C.
(2) continuous Casting: vertical casting machine is used, the molten metal bath prepared is poured into continuous casting billet, continuous casting temperature is
1450~1480 DEG C.
(3) bar rolls: choosing weighed, qualified after survey length continuous casting billet, is sent to heating furnace and is heated to 1180~1250 DEG C simultaneously
Heat preservation, after high pressure water dephosphorization, be sent into milling train group rolled, finishing.
(4) scraper plate shapes: the blanking of suitable length bar is chosen, lower good material is heated to 1180 in Medium Frequency Induction Heating Furnace~
After 1250 DEG C, draw out is carried out using double-arm free-forging Single arm and forging manipulator, die forging is carried out to blank after pulling, it is right
Forging carries out trimming, after forging cooled to room temperature, processes fixing hole hole by standard size in forging specified position.
(5) heat treatment process: the slab of scraping of forming is heated to 590~610 DEG C with the rate of heat addition of 95~105 DEG C/h, heat preservation
1.75~2.25h, then be heated to 1080~1120 DEG C with the rate of heat addition of 145~155 DEG C/h, keeps the temperature 1.75~2.25h, in water
It is cooling.
5. the manufacturing method of novel high wear-resistant scraper plate according to claim 4, which is characterized in that high in the step (3)
Pressing the soaking time before water dephosphorization process is wall thickness 25mm/h, and the temperature drop that high pressure water dephosphorization generates continuous casting billet is on 10 DEG C of left sides
It is right.
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| CN201811238111.0A CN109402503A (en) | 2018-10-23 | 2018-10-23 | A kind of novel high wear-resistant scraper plate and its manufacturing method |
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| CN201811238111.0A CN109402503A (en) | 2018-10-23 | 2018-10-23 | A kind of novel high wear-resistant scraper plate and its manufacturing method |
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Application publication date: 20190301 |