CN106636836A - Preparation method of ultra-coarse hard alloy - Google Patents
Preparation method of ultra-coarse hard alloy Download PDFInfo
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- CN106636836A CN106636836A CN201710046649.0A CN201710046649A CN106636836A CN 106636836 A CN106636836 A CN 106636836A CN 201710046649 A CN201710046649 A CN 201710046649A CN 106636836 A CN106636836 A CN 106636836A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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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
- B22F3/02—Compacting only
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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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of ultra-coarse hard alloy, which solves the problem of complicated technology in the preparation method of the ultra-coarse hard alloy in the prior art. The preparation method comprises the following steps of adding a wet grinding medium into solid raw materials to be wetly ground, using a columnar alloy bar as a wet grinding body, drying after wet grinding, and preparing into a mixture with average particle size of 3.0 to 5.0, wherein the solid raw materials comprise a forming agent, cobalt powder and ultra-coarse tungsten carbide with particle size of 15 to 26; pressing the mixture into a blank, sintering the blank, and performing surface treatment at low pressure, so as to prepare the ultra-coarse WC-Co (silicon carbide-cobalt) hard alloy. The preparation method has the advantages that the granularity is effectively increased, the cost is reduced, the production time length is reduced, and the like.
Description
Technical field
The present invention relates to a kind of preparation method of alloy, and in particular to a kind of preparation method of super thick hard alloy.
Background technology
The hard alloy huge market demand of extra-coarse grained degree, the imported product in alternative field used in connection with, can meet
Demand of the domestic correspondent to such product, application is wider, and price is higher, and benefit is more preferable.The hard alloy in low cobalt of preparation is used
Build the road tooth in production, high-cobalt hart metal is used to produce coal cutting teeth, according to the size and the difference of coal cutting teeth size of coal-cutting machinery
Select different materials.
In prior art, Chemical coating method and nanometer powder dissolution method are the main of super coarse-grain WC-Co hard alloy preparation
Method, but there is the problems such as preparation is complicated, and cost input is big in existing method.
The content of the invention
The technical problem to be solved is：In prior art there is work in the preparation method of super coarse-grain hard alloy
The complicated problem of skill, it is therefore intended that the preparation method of a kind of super thick hard alloy that offer solves the above problems.
In the present invention, the research and development of the super coarse-grain hard alloy are by the common coarse granule (WC grain of original cobalt (Co) 10%
2.4 μm or so of degree), by technological improvement, it is developed into super thick alloy (the WC grain degree of the same trade mark (alloy composition is substantially unchanged)
4.0-5.5 μm, the product of the model of the same race of the close Wei Tegen companies production of its correlation performance parameters.
The present invention is achieved through the following technical solutions：
A kind of preparation method of super thick hard alloy, including：
Wet grinding media is added to carry out Wet blend-milling in solid material, the abrasive body of wet grinding adopts the alloy bar of column, wet
The compound for making that mean diameter is 3.0～5.0 μm is dried after mill；The solid material include forming agent, particle diameter be 1～
2 μm of cobalt powder and particle diameter are 12～20 μm of super thick tungsten carbide；
Compound is pressed into into pressed compact, after pressed compact sintering, then super coarse-grain is can be made into after low pressure and surface treatment
WC-Co hard alloy.
The present invention can effectively prepare the alloy of larger grain size, especially raw material by the optimization of above-mentioned technological parameter
Optimized choice and column alloy bar optimized choice, can be effectively increased made by super coarse-grain WC-Co hard alloy crystalline substance
Granularity, 4.0～5.5 μm are brought up to by original grain size for 2.4 μm, and then effectively make the intensity of hard alloy, shock resistance
Increase, effect is very notable.
Further, the abrasive body and the mass ratio of solid material are 1～2.5:1, preferably 1.5～2:1；The conjunction of column
A diameter of 10mm of golden rod, the length of the alloy bar of column is 18mm.The wet grinding media be anhydrous alcohol, anhydrous alcohol plus
Enter amount for 0.2～0.3L/Kg.The wet grinding time is 10～21h；Preferably 10～15h.
By the optimization of above-mentioned condition, not only it is only capable of effectively reducing WC grain and crushes, makes the crystalline substance of hard alloy prepared
Granularity is more than 5.0, further increases intensity, the shock resistance of hard alloy.Also, the optimum organization for passing through above-mentioned condition,
Wet grinding time, wet grinding media input amount, abrasive body addition, the input cost of raw material can also effectively be reduced；That is, will be original
The milling time of 10～21h is reduced to existing 10～15h, by the input amount of wet grinding media from original 0.3mL/Kg～
0.4mL/Kg is lowered to 0.2～0.3L/Kg, by the addition of abrasive body from original 4:1 or so is adjusted to 1.5～2:1.
Also, the content of cobalt can also be effectively reduced after the optimization of above-mentioned condition, i.e. cobalt content is slightly lowered, WC's
Ratio slightly rises, because the price of cobalt (being higher by more than 30%) higher than WC price at present, the reduction of cobalt content so that alloy
In cost of material be declined slightly.But because the grain size length of alloy is thick, alloy strength increases, therefore, the impact resistance of alloy
Can be more preferable on the contrary.Thus, by the optimization of present invention process, can reach：Cost declining, puies forward high-quality double effectses, effect ten
Divide notable.
Preferably, the cobalt powder accounts for 7～13wt% of solid material gross weight.The forming agent is paraffin, and paraffin accounts for cobalt
1～2.5wt% of powder and super thick tungsten carbide gross weight.
Further, the compound first crosses 200～500 eye mesh screens, places in granulator and pelletizes, finally in press
Pressed compact is pressed into, pressure during compacting is 60～95MPa.Meanwhile, the mould in the present invention on press is constituted using alloy material,
The constriction coefficient of the mould is 1.23～1.26.Industry is suppressed in powder, because the product of compacting has certain contractility, thus
Mould is typically big than sample embryo design size.The introduction of the constriction coefficient of the mould is documented in what Chen Chuxuan old Mr.s write《Hard
Alloy mass control principle》The compressing part of one book.
The constriction coefficient of mould is adjusted between 1.23～1.26 accordingly by original 1.21 in the present invention, and mould
Material is accordingly adjusted to alloy mold by original punching block.The adjustment constituted by the constriction coefficient of above-mentioned mould, mold materials
And the pre-treating technology of granulation, the problems such as the super coarse-grain compound poor fluidity of effectively solving and difficult forming, it is ensured that product hair
Embryo is not stratified, flawless, occur without and the phenomenon such as do not press, meanwhile, substantially prolongs the mold use life-span.
The present invention optimizes sintering process when pressed compact is sintered simultaneously, and detailed process is：
High-temperature vacuum sintering is carried out first：Pressed compact is incubated under the conditions of 350～450 DEG C, simultaneously deoxidation takes off forming agent of decorporating
Gas, then sintering temperature is increased to into 1450～1550 DEG C, one hour is incubated, it is cooled to room temperature；Then low pressure sintering is carried out again：Rise
Temperature is pressurizeed 45～55 kilograms to 1150～1250 DEG C, while add flanging to be warming up to 1350～1450 DEG C, heat-insulation pressure keeping one hour, and most
After be cooled to room temperature.
The present invention is adjusted to sintering method, by once sintered molding, is adjusted to double sintering molding, is for the first time
Vacuum high-temperature sintering, is for the second time low-pressure low-temperature sintering, has both guaranteed that alloy grain was thicker, and the technology that internal performance is improved is ensured again
Require.That is, the optimal design-aside of sintering process of the present invention, not only guarantees that alloy grain is thicker, but also effectively prevent alloy
Hole occur, the porosity for making alloy reaches A02B00, without hole, the service life of alloy is significantly increased.
Further, after the sintering made by super coarse-grain WC-Co hard alloy processed by process of surface treatment,
The process of surface treatment is：
Blasting treatment is carried out to super coarse-grain WC-Co hard alloy；After the completion of sandblasting, add together with hard alloy mill ball
Ball milling in tumbling mill；Hard alloy mill ball is 1～4 with the ratio of grinding media to material of super coarse-grain WC-Co hard alloy:1, abrasive media plus
It is 0.1～0.2mL/Kg to enter amount, and the rotating speed of tumbling mill is 20～60 revs/min.
Process of surface treatment in the present invention is more applicable for the surface treatment of super thick hard alloy, by the inventive method
Barreling process after finished product hard alloy surface smoothness it is higher, by barreling process after alloy finished product defect, such as：Point
Layer, crackle, bubbling etc. are just easy to come out, and can effectively prevent faulty goods from entering market, and can effectively grind off product
Veining defect, and barreling process after precipitation material can be increased operation rate with recycling.Also, by the work of the present invention
Skill, can effectively eliminate the residual stress that alloy is produced in sintering process, improve the impact resistance of alloy, and prolongation uses the longevity
Life.
The present invention compared with prior art, has the following advantages and advantages：
1st, the method for the present invention has the advantages that process is simple, cost are reduced, the time is reduced；
It is 2nd, of the invention that because the grain size length of alloy is thick, alloy strength increases, therefore, the shock resistance of alloy is more preferable.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the SEM figures of WC powder in the present invention.
Fig. 2 is the SEM figures of Co powder in the present invention.
Fig. 3 is the crystalline phase figure of super coarse-grain WC-Co hard alloy in the present invention.
Fig. 4 is the SEM figures of super coarse-grain WC-Co hard alloy in the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
A kind of preparation method of super thick hard alloy, including：Wet grinding media is added to carry out Wet blend-milling in solid material,
The abrasive body of wet grinding adopts the alloy bar of column, and abrasive body is 1.5 with the mass ratio of solid material:1, the alloy bar of column it is straight
Footpath is 10mm, and the length of the alloy bar of column is 18mm.In the wet grinding wet grinding media be anhydrous alcohol, the addition of anhydrous alcohol
For 0.2L/Kg, the wet grinding time is 12h.
Solid material is forming agent, cobalt powder and super thick tungsten carbide in above-mentioned steps, and the wherein particle diameter of cobalt powder is 0.5～1 μm
Left and right, as shown in Figure 2；The particle diameter of the super thick tungsten carbide is 12～20 μm, as shown in Figure 1.The cobalt powder accounts for solid original in this step
The 8wt% of material gross weight, forming agent is paraffin, and paraffin accounts for the 2wt% of cobalt powder and super thick tungsten carbide gross weight.
The mixture obtained after above-mentioned wet grinding is being vacuum dried, mean diameter is being made after being dried for 3.0～5.0
μm compound, compound crosses 200～500 eye mesh screens, then compound is put in granulator rolls 15 minutes or so.
Adopt press that compound is made into pressed compact in the case where pressure is for the pressing conditions of 60～95MPa, the mould on press is adopted
Constituted with alloy material, the constriction coefficient of the mould is 1.23～1.26.
After pressed compact is compressing, pressed compact is sintered under vacuum, the present invention is burnt by the way of double sintering
Knot detailed process is as follows：
First sintering is high-temperature vacuum sintering：Coarse granule is pressed into into corresponding shape, 400 DEG C or so insulations of Jing are moved back
Remove forming agent, 400 DEG C or so heat-preserving deoxidizings degassings re-sinter fine and close to high temperature, and finally to 1500 DEG C of maximum temperature, insulation one is little
When or so be cooled to room temperature.Sinter again for low pressure for second, be directly warming up to 1200 DEG C or so, pressurize 50 kilograms, side pressurization
While be warming up to 1400 or so DEG C, heat-insulation pressure keeping one hour or so, after be cooled to room temperature and can be made into super crude crystal WC-Co hard and close
Gold.
Preferably, after the sintering made by super coarse-grain WC-Co hard alloy processed by process of surface treatment, should
Process of surface treatment is：
Blasting treatment is carried out to super coarse-grain WC-Co hard alloy；After the completion of sandblasting, add together with hard alloy mill ball
Ball milling in tumbling mill；Hard alloy mill ball is 3 with the ball material mass ratio of super coarse-grain WC-Co hard alloy:1, abrasive media
Addition is 0.2mL/Kg, and the rotating speed of tumbling mill is 50 revs/min.
Super coarse-grain WC-Co hard alloy is detected, testing result as shown in figs. 34, can card by the detection
It is bright, the super coarse-grain WC-Co hard alloy that grain size reaches 4.0～5.5 μm can effectively be prepared using the method for the present invention, and
And the porosity of the alloy being prepared by the method for the present invention out reaches A02B00, the hole that effectively prevent alloy occurs, significantly
Put forward heavy alloyed service life degree.
By the adjustment of pressing process and mould, the layering that alloy presses embryo is effectively reduced, crackle is not pressed, and falls side
Arrisdefect, burr is excessive, marks on surface and pitted skin etc..To can reach minute surface bright and clean on the surface of alloy after the process of final alloy surface treatment
Degree, the value of surface roughness Ra is 0.8, and the more original technique of residual stress reduces by 60% or so, and compared with the technique of embodiment 6 40% is reduced
Left and right.
Embodiment 2
The present embodiment is the performance parameter during wet grinding to be optimized in the present embodiment, specifically with the difference of embodiment 1
Arrange as follows：
The abrasive body is 1 with the mass ratio of solid material:1；The addition of anhydrous alcohol be 0.2L/Kg, the wet grinding time
For 15h.
The super coarse-grain WC-Co hard alloy prepared to the present embodiment detects, detects that the super crude crystal WC-Co is hard
The grain size of matter alloy reaches 3.0～3.5 μm or so.
Embodiment 3
The present embodiment is the performance parameter during wet grinding to be optimized in the present embodiment, specifically with the difference of embodiment 1
Arrange as follows：
The abrasive body is 3 with the mass ratio of solid material:1；The addition of anhydrous alcohol be 0.3L/Kg, the wet grinding time
For 20h.
The super coarse-grain WC-Co hard alloy prepared to the present embodiment detects, detects that the super crude crystal WC-Co is hard
The grain size of matter alloy reaches 2.4～2.8 μm or so.
Embodiment 4
The present embodiment is comparative example, and the present embodiment is with the difference of embodiment 1, the parameter of wet grinding in the present embodiment
It is concrete to arrange as follows and sintering process is different：
In wet grinding, the abrasive body is 4 with the mass ratio of solid material:1；Abrasive body adopts the alloy of a diameter of 4-8mm
Ball.The wet grinding media is anhydrous alcohol, and the addition of anhydrous alcohol is 0.4L/Kg.The wet grinding time is 24h.
In sintering, sintering adopts once sintered method, and sintering temperature is controlled at 1400 DEG C～1500 DEG C in sintering process, protects
At 100 minutes or so, the intrinsic pressure power of sintering furnace was maintained at below 5MPa to warm time control.
The super coarse-grain WC-Co hard alloy prepared to the present embodiment detects, detects that the super crude crystal WC-Co is hard
The grain size of matter alloy reaches 2.0～2.4 μm or so.
Embodiment 5
The present embodiment is comparative example, and the present embodiment is with the difference of embodiment 1, the parameter of wet grinding in the present embodiment
It is concrete to arrange as follows and sintering process is different：
At 1400 DEG C～1500 DEG C, temperature retention time is controlled at 100 minutes or so, and sintering furnace is intrinsic pressure to try hard to keep for sintering temperature control
Hold in below 5MPa；The abrasive body is 2 with the mass ratio of solid material:1；Abrasive body adopts the alloying pellet of a diameter of 4-8mm.
The wet grinding media is anhydrous alcohol, and the addition of anhydrous alcohol is 0.3L/Kg.The wet grinding time is 12h.
The super coarse-grain WC-Co hard alloy prepared to the present embodiment detects, detects that the super crude crystal WC-Co is hard
The grain size of matter alloy reaches 4.0 μm or so.
Embodiment 6
The present embodiment is comparative example, and the present embodiment is with the difference of embodiment 1, in the present embodiment pressing process and
The step of process of surface treatment, parameter was different, and concrete setting is as follows：
In the present embodiment, the mould on press is constituted using alloy material, and the constriction coefficient of the mould is 1.21.
The process of surface treatment is：Blasting treatment is carried out to super coarse-grain WC-Co hard alloy；It is and hard after the completion of sandblasting
Matter alloy mill ball adds together ball milling in tumbling mill；The ball material matter of hard alloy mill ball and super coarse-grain WC-Co hard alloy
Amount is than being 5:1, the addition of abrasive media is 0.3mL/Kg, and the rotating speed of tumbling mill is 10 revs/min.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of super thick hard alloy, it is characterised in that include：
Wet grinding media is added to carry out Wet blend-milling in solid material, the abrasive body of wet grinding adopts the alloy bar of column, after wet grinding
It is dried the compound for making that mean diameter is 3.0～5.0 μm；The solid material includes that forming agent, particle diameter are 1～2 μm
Cobalt powder and super thick tungsten carbide that particle diameter is 12～20 μm；
Compound is pressed into into pressed compact, after pressed compact sintering super coarse-grain WC-Co hard alloy is made.
2. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that the abrasive body with it is solid
The mass ratio of body raw material is 1～2.5:1.
3. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that the wet grinding media is
Anhydrous alcohol, the addition of anhydrous alcohol is 0.2～0.3L/Kg.
4. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that the wet grinding time is
10～21h.
5. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that the cobalt powder accounts for solid
7～13wt% of raw material gross weight.
6. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that the forming agent is stone
Wax, paraffin accounts for 1～2.5wt% of cobalt powder and super thick tungsten carbide gross weight.
7. a kind of preparation method of super thick hard alloy according to claim 1, it is characterised in that the compound compacting
It is 60～95MPa into pressure during pressed compact.
8. the preparation method of a kind of super thick hard alloy according to claim 7, it is characterised in that will be mixed using press
Material is pressed into pressed compact, and the mould on press is constituted using alloy material, and the constriction coefficient of the mould is 1.23～1.26.
9. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that when the pressed compact is sintered
Sintering process be：
High-temperature vacuum sintering is carried out first：Pressed compact is incubated under the conditions of 350～450 DEG C, decorporate forming agent and deoxidation degassing, then
Sintering temperature is increased to into 1450～1550 DEG C, one hour is incubated, room temperature is cooled to；Then low pressure sintering is carried out again：It is warming up to
1150～1250 DEG C, pressurize 45～55 kilograms, while adding flanging to be warming up to 1350～1450 DEG C, heat-insulation pressure keeping one hour is last cold
But to room temperature.
10. the preparation method of a kind of super thick hard alloy according to claim 1, it is characterised in that make after the sintering
Into super coarse-grain WC-Co hard alloy processed by process of surface treatment, the process of surface treatment is：
Blasting treatment is carried out to super coarse-grain WC-Co hard alloy；After the completion of sandblasting, together with hard alloy mill ball barreling is added
Ball milling in machine；Hard alloy mill ball is 1～4 with the ball material mass ratio of super coarse-grain WC-Co hard alloy:1, abrasive media plus
It is 0.1～0.2mL/Kg to enter amount, and the rotating speed of tumbling mill is 20～60 revs/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109014217A (en) * | 2018-08-09 | 2018-12-18 | 蓬莱市超硬复合材料有限公司 | A kind of button compacting Production and quality control technique |
| CN109097617A (en) * | 2018-09-25 | 2018-12-28 | 贵州科宇泰科技咨询有限公司 | A kind of hard alloy processing technology |
| CN109719301A (en) * | 2018-11-30 | 2019-05-07 | 蓬莱市超硬复合材料有限公司 | A kind of method of quality control preparing hard alloy roll |
| CN110157969A (en) * | 2019-07-10 | 2019-08-23 | 合肥工业大学 | A kind of preparation method of the super thick Talide containing trace cobalt |
| CN111593220A (en) * | 2020-05-29 | 2020-08-28 | 江西省科学院应用物理研究所 | Preparation method for improving performance of WC-Co hard alloy by adding rare earth |
| CN114309614A (en) * | 2021-12-28 | 2022-04-12 | 乐清市跃宇合金材料有限公司 | Preparation method of alloy blade for step lock hole drilling |
| CN115837465A (en) * | 2022-12-13 | 2023-03-24 | 长沙华信合金机电有限公司 | Method for eliminating stress of sintered hard alloy |
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| CN109097617A (en) * | 2018-09-25 | 2018-12-28 | 贵州科宇泰科技咨询有限公司 | A kind of hard alloy processing technology |
| CN109719301A (en) * | 2018-11-30 | 2019-05-07 | 蓬莱市超硬复合材料有限公司 | A kind of method of quality control preparing hard alloy roll |
| CN110157969A (en) * | 2019-07-10 | 2019-08-23 | 合肥工业大学 | A kind of preparation method of the super thick Talide containing trace cobalt |
| CN110157969B (en) * | 2019-07-10 | 2021-07-27 | 合肥工业大学 | Preparation method of ultra-coarse tungsten carbide hard alloy containing trace cobalt |
| CN111593220A (en) * | 2020-05-29 | 2020-08-28 | 江西省科学院应用物理研究所 | Preparation method for improving performance of WC-Co hard alloy by adding rare earth |
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| CN114309614B (en) * | 2021-12-28 | 2023-12-22 | 乐清市跃宇合金材料有限公司 | Preparation method of alloy blade for step keyhole drill |
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