CN108149111A - Hard alloy suitable for cutting of hardened steel and preparation method thereof - Google Patents
Hard alloy suitable for cutting of hardened steel and preparation method thereof Download PDFInfo
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- CN108149111A CN108149111A CN201711261722.2A CN201711261722A CN108149111A CN 108149111 A CN108149111 A CN 108149111A CN 201711261722 A CN201711261722 A CN 201711261722A CN 108149111 A CN108149111 A CN 108149111A
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- Prior art keywords
- cutting
- hard alloy
- hardened steel
- powder
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Classifications
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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
-
- 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
-
- 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
Abstract
The invention discloses a kind of suitable for hard alloy of cutting of hardened steel and preparation method thereof, the component contained suitable for the hard alloy of cutting of hardened steel and each component weight percent are as follows：2.5~6.0% Co powder, 2.0~4.0% TaC powder, surplus are the superfine WC power of 0.4~0.6 μm of Fisher particle size, amount to 100%.The present invention realizes the matched well of alloy strength and microhardness, improves the comprehensive performance of hard alloy and the ability of heat shock resistance and heat resistanceheat resistant flow.
Description
Technical field
The present invention relates to a kind of suitable for hard alloy of cutting of hardened steel and preparation method thereof.
Background technology
At present, hard alloy has extensive purposes with its high rigidity and high intensity, and being substituted high-speed steel at present becomes
The main material of metal cutting process cutter.Hardened steel refers to metal after quenching, is organized as martensite, and hardness is more than
The steel of HRC55.It occupies sizable proportion in hard-cutting material.The conventional method of Machining Hardened Steels is grinding.But in order to
Processing efficiency is improved, solves the problems, such as that workpiece shapes are complicated and generation Geometrical Error after cannot being ground and quenching, often
It just needs using cutting working methods such as turning, milling, boring, drilling and reams.Hardened steel has following characteristics in cutting：Firmly
Degree is high, intensity is high, and almost without plasticity, this is the main cutting characteristic of hardened steel；Cutting force is big, cutting temperature is high；It is not easy to produce
Raw built-up edge；Blade easily collapses broken, abrasion；Thermal conductivity factor is low.
Due to the cutting characteristic of hardened steel, cutter material will not only have high hardness, wearability, heat resistance, but also have
Good intensity and thermal conductivity.Traditional hard alloy intensity and microhardness matching are poor, and comprehensive performance is relatively low, especially closes
The elevated temperature strength of gold is not high, and heat shock resistance and heat resistanceheat resistant flow ability be not high, is not suitable for working under high temperature environment, greatly limit
The application range of alloy, therefore all it is not suitable for cutting of hardened steel.
Invention content
The technical problems to be solved by the invention are the defects of overcoming the prior art, are provided a kind of suitable for cutting of hardened steel
Hard alloy, it realizes the matched well of alloy strength and microhardness, improve hard alloy comprehensive performance and
The ability of heat shock resistance and heat resistanceheat resistant flow.
In order to solve the above technical problems, the technical scheme is that：A kind of hard suitable for cutting of hardened steel closes
Gold, the component and each component weight percent that it contains are as follows：
2.5~6.0% Co powder, 2.0~4.0% TaC powder, surplus are the ultrafine WC of 0.4~0.6 μm of Fisher particle size
Powder amounts to 100%.
The grain growth inhibitor of 0.2~0.5wt% is also added suitable for the component of the hard alloy of cutting of hardened steel.
The weight ratio of grain growth inhibitor and Co powder is (0.06~0.10)：1.
The grain growth inhibitor is VC+Cr3C2。
Ranging from 29~41KA/m of the Hcp values of WC powder.
The present invention also provides a kind of preparation method of the hard alloy suitable for cutting of hardened steel, the step of method in contain
Have：
Dispensing, wet-milling, spray drying, compression moulding and sintering circuit are carried out successively；Wherein, the ball material weight ratio of wet-milling is
(4.0~5.0)：1, liquid-solid ratio is 350~400ml/Kg, and Ball-milling Time is 96~120h；Sintering temperature in sintering circuit is
1430~1450 DEG C.
Further, sintering uses more gas pressure sinterings.
After employing above-mentioned technical proposal, by the component of the present invention and the design of each component weight percent, realize
The matched well of alloy strength and microhardness improves the comprehensive performance of hard alloy and heat shock resistance and heat resistanceheat resistant flow
Ability.
Specific embodiment
In order that the present invention can be more clearly and readily understood, below according to specific embodiment, the present invention is made into
One step is described in detail.
Embodiment one：
During dispensing select weight percent be 6.0% Co powder, 4.0% TaC powder, surplus be 04 type WC powder, Fei Shi
Granularity is 0.42 μm, Hcp values are 36.5~40.5KA/m, and more than component amounts to 100%；Using absolute alcohol as ball-milling medium,
Liquid-solid ratio is 375ml/Kg, and ball material weight ratio is 4.8:1, Ball-milling Time is 96 hours, is spray-dried and mixture is made, be molded into
After type, it is placed in pressure sintering furnace and is sintered with 1430 DEG C.Using PS21 (size is 6.5 × 5.25 × 20 ㎜) testing bars as
The standardized product of hard alloy prepared by the present embodiment method is examined, WC mean grain sizes are 0.5 μm, and bending strength is
3600MPa, hardness Hv301810~1910.
Embodiment two：
The Co powder that weight percent is 5.0%, 3% TaC powder, 04 type WC powder, Fisher particle size 0.5 are selected during dispensing
μm, Hcp values be 33.5~36.5KA/m；Using absolute alcohol as ball-milling medium, liquid-solid ratio 375ml/Kg, ball material weight ratio is
4.8:1, Ball-milling Time is 102 hours, is spray-dried and mixture is made, and after compression molding, is placed in pressure sintering furnace with 1440
It DEG C is sintered.Using PS21 (size is 6.5 × 5.25 × 20 ㎜) testing bars as the hard that the present embodiment method is examined to prepare
The standardized product of alloy, WC mean grain sizes are 0.55 μm, bending strength 3450MPa, hardness Hv301840~1930.
Embodiment three：The Co powder that weight percent is 2.5%, 3% TaC powder, 04 type WC powder, Fei Shi are selected during dispensing
Granularity is 0.4 μm, Hcp values are 36.5~41KA/m；Using absolute alcohol as ball-milling medium, liquid-solid ratio 400ml/Kg, ball material
Weight ratio is 4.8:1, Ball-milling Time is 120 hours, is spray-dried and mixture is made, after compression molding, be placed in pressure sintering furnace
It is interior to be sintered with 1450 DEG C.Using PS21 (size is 6.5 × 5.25 × 20 ㎜) testing bars as inspection the present embodiment method system
The standardized product of standby hard alloy, WC mean grain sizes are 0.40 μm, bending strength 3750MPa, hardness Hv30 1910
~2020.
Example IV：The Co powder that weight percent is 4.0%, 2% TaC powder, 04 type WC powder, Fei Shi are selected during dispensing
Granularity is 0.52 μm, Hcp values are 31~34.0KA/m；Using absolute alcohol as ball-milling medium, liquid-solid ratio 400ml/Kg, ball material
Weight ratio is 4.8:1, Ball-milling Time is 108 hours, is spray-dried and mixture is made, after compression molding, be placed in pressure sintering furnace
It is interior to be sintered with 1450 DEG C.Using PS21 (size is 6.5 × 5.25 × 20 ㎜) testing bars as inspection the present embodiment method system
The standardized product of standby hard alloy, WC mean grain sizes are 0.55 μm, bending strength 3300MPa, hardness Hv30 1860
~1950.
In above example, 04 type WC using " purple tungsten technique " prepare, in particular to：1st, raw material is the purple oxygen of high-purity
Compound；2nd, state-of-the-art rotary kiln reduction replaces traditional four pipes or 14 pipe reduction furnaces, so that its reduction temperature is relatively
Height, impurity content are greatly decreased, and crystallization is more complete；3rd, the air-flow under inert gas shielding crushes substitution Mechanical Crushing.Pass through
These technological innovations, 04 type WC crystallizations prepared by " purple tungsten technique " are complete, and grain-boundary strength is more preferable.
It prepares using enclosed spray drying+cyclone granulation, crucial stock preparation process is all in closed environment next step
It completes, oxygenation is greatly reduced, and reduces influence of the manual operation factor to product quality, and cyclone granulation ginseng to the full extent
Number design is constant, and the particle size of preparation is divided equally, and size distribution is narrower, so that it is guaranteed that properties of product are more stable.
0.2~0.5% grain growth inhibitor can be also added in above example.Grain growth inhibitor and Co powder
Weight ratio is (0.06~0.10)：1；The grain growth inhibitor is VC+Cr3C2；VC refers to vanadium carbide.
Due to having selected " purple tungsten technique " WC powder that Fisher particle size is 0.4~0.6 μm as raw material, while using in right amount
TaC powder, by " more gas pressure sinterings ", makes the hard alloy of the present invention finally obtained to improve the elevated temperature strength of alloy
Mean grain size reaches 0.4~0.6 μm, and alloy crystallization is complete, and subgrain is relatively coarse, and microstrain is small, microhardness
Height, wearability and toughness have obtained largely improving, and realize the matched well of intensity and microhardness, and bending resistance is strong
Degree has reached 3000~4000MPa, and hardness has reached Hv301810~2020, so as to greatly improve alloy comprehensive performance, very
Suitable for high-speed cutting hardened steel.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (7)
1. a kind of hard alloy suitable for cutting of hardened steel, it is characterised in that the component and each component weight percent that it contains
It is as follows：
2.5~6.0% Co powder, 2.0~4.0% TaC powder, surplus are the superfine WC power of 0.4~0.6 μm of Fisher particle size, always
Meter 100%.
2. the hard alloy according to claim 1 suitable for cutting of hardened steel, it is characterised in that：Also add in its component
Add the grain growth inhibitor of 0.2~0.5wt%.
3. the hard alloy according to claim 2 suitable for cutting of hardened steel, it is characterised in that：Grain growth inhibitor
Weight ratio with Co powder is (0.06~0.10)：1.
4. the hard alloy suitable for cutting of hardened steel according to Claims 2 or 3, it is characterised in that：The crystal grain is long
Big inhibitor is VC+Cr3C2。
5. the hard alloy according to claim 1 suitable for cutting of hardened steel, it is characterised in that：The Hcp values of WC powder
Ranging from 29~41KA/m.
6. a kind of preparation method of hard alloy suitable for cutting of hardened steel as described in any one of claim 1 to 5,
Contain in the step of being characterized in that method：
Dispensing, wet-milling, spray drying, compression moulding and sintering circuit are carried out successively；Wherein, the ball material weight ratio of wet-milling is (4.0
~5.0)：1, liquid-solid ratio is 350~400ml/Kg, and Ball-milling Time is 96~120h；Sintering temperature in sintering circuit is 1430
~1450 DEG C.
7. preparation method according to claim 6, it is characterised in that：Sintering uses more gas pressure sinterings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261722.2A CN108149111A (en) | 2017-12-04 | 2017-12-04 | Hard alloy suitable for cutting of hardened steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261722.2A CN108149111A (en) | 2017-12-04 | 2017-12-04 | Hard alloy suitable for cutting of hardened steel and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108149111A true CN108149111A (en) | 2018-06-12 |
Family
ID=62466496
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711261722.2A Pending CN108149111A (en) | 2017-12-04 | 2017-12-04 | Hard alloy suitable for cutting of hardened steel and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760731A (en) * | 2019-11-20 | 2020-02-07 | 株洲金特硬质合金有限公司 | Ultra-fine grain hard alloy applied to cutting tool and preparation method thereof |
| CN110964966A (en) * | 2019-12-30 | 2020-04-07 | 株洲夏普高新材料有限公司 | Hard alloy suitable for cutting high manganese steel and preparation method thereof |
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| CN101121983A (en) * | 2007-09-20 | 2008-02-13 | 株洲硬质合金集团有限公司 | Method for preparing coarse grain hard alloy |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
| CN101812621A (en) * | 2010-04-22 | 2010-08-25 | 株洲硬质合金集团有限公司 | Submicron hard alloy and preparation method |
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| CN106756392A (en) * | 2016-12-14 | 2017-05-31 | 单麒铭 | A kind of oil field preparation method of WC Co carboloy nozzles |
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2017
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Patent Citations (7)
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| CN101121983A (en) * | 2007-09-20 | 2008-02-13 | 株洲硬质合金集团有限公司 | Method for preparing coarse grain hard alloy |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
| CN101812621A (en) * | 2010-04-22 | 2010-08-25 | 株洲硬质合金集团有限公司 | Submicron hard alloy and preparation method |
| CN102994792A (en) * | 2012-12-10 | 2013-03-27 | 湖南世纪特种合金有限公司 | Preparation method for high-strength and high-hardness nanocrystalline tungstate-cobalt hard alloy |
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| CN106756392A (en) * | 2016-12-14 | 2017-05-31 | 单麒铭 | A kind of oil field preparation method of WC Co carboloy nozzles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760731A (en) * | 2019-11-20 | 2020-02-07 | 株洲金特硬质合金有限公司 | Ultra-fine grain hard alloy applied to cutting tool and preparation method thereof |
| CN110964966A (en) * | 2019-12-30 | 2020-04-07 | 株洲夏普高新材料有限公司 | Hard alloy suitable for cutting high manganese steel and preparation method thereof |
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Application publication date: 20180612 |
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