CN106086570A - A kind of hard alloy material and the method preparing sintered carbide tool material thereof - Google Patents
A kind of hard alloy material and the method preparing sintered carbide tool material thereof Download PDFInfo
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- CN106086570A CN106086570A CN201610438877.8A CN201610438877A CN106086570A CN 106086570 A CN106086570 A CN 106086570A CN 201610438877 A CN201610438877 A CN 201610438877A CN 106086570 A CN106086570 A CN 106086570A
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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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- 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
- C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
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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
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Abstract
The present invention relates to Hardmetal materials field, be specifically related to a kind of hard alloy material and the method preparing sintered carbide tool material thereof, the component of described hard alloy material and the percentage by weight of each component be: tungsten carbide: 80 90%；Cobalt powder: 6 12%；Titanium carbide: 0 5%；Titanium nitride: 0 5%；Trace element: 0 0.5%；Described material powder particle size distribution is in 0.5 2um.Present invention hard alloy material is prepared the method for sintered carbide tool material and is included: mixed powder, ball milling, be dried, sieve, briquetting, presintering, high-temperature vacuum sintering, high temperature nitrogen sintering.The sintered carbide tool material low cost of manufacture that preparation method of the present invention prepares, surface has gold or rufous appearance, hardness is high, wearability is good, and film-substrate cohesion is strong, and the relative density of the sintered carbide tool material prepared by the inventive method is higher than 99%, hardness is 20～28GPa, and fracture toughness is 6～8MPa m1/2, the film-substrate cohesion critical load that scarification test obtains is more than 80N.
Description
Technical field
The present invention relates to a kind of hard alloy material and the method preparing sintered carbide tool material thereof, be specifically related to one
Rich surface tungsten carbide base carbide alloy raw material containing Ti base hard phase and preparation method thereof is prepared by in-situ chemical reaction.
Background technology
Hard alloy is by metal carbide powders (WC, TiC, TiCN, VC, Cr of high rigidity infusibility3C2, TaC, ZrC etc.)
For principal phase, using magnesium-yttrium-transition metal cobalt (Co), nickel (Ni), molybdenum (Mo), ferrum (Fe) etc. as the one of Binder Phase high temperature sintering
Alloy material.Prepared by the method for hard alloy many employings metal powder metallurgy technique, high-temperature liquid-phase sintering.Hard alloy has
Many excellent properties such as high intensity, high rigidity, high tenacity, so be widely used in cutting, hole, dig up mine, instrument shaping
And the field [7] such as wear part.Compared with high-speed steel, hard alloy has preferable red hardness, when temperature is more than 600 DEG C,
The high high-speed steel at room temperature of its hardness；When temperature is more than 1000 DEG C, and its hardness is still above room temperature carbon steel.
In view of carbide tool to efficiently, in high precision, high reliability and customizations direction develop, and due to
In high-speed cutting processing, produced heat in metal cutting is more much higher than routine cutting to the abrasion of carbide tool, therefore closes hard
The hardness of gold copper-base alloy, intensity, wearability, toughness and impact resistance and high red hardness and chemical stability have higher wanting
Ask.Ti base hard phase has good high rigidity, high tenacity, high-wearing feature and chemical stability, and excellent heat stability is with anti-
High temperature oxidation resistance, smooth surface and relatively low coefficient of friction, the ultimate breaking strength of its key is than the pole of fragile material
Limit fracture strength exceeds 20%, is very suitable for high speed, extra accuracy processing, is the main side preparing high-performance carbide cutter
To.Coating can be effectively improved hard metal article case hardness and wearability, extends the use longevity of hard metal article
Life, reduces loss, improves machining efficiency.For improving the cutting ability of hard alloy, industrially developed country more than 80% hard
Matter alloy cutter all processes through surface-coated.It practice, band coating carbide tool, it is possible to be effectively improved borehole accuracy,
Improve anti-wear performance thus extend cutter life.
In the actual application of band coating carbide tool, the greatest problem faced be coating can produce excessive residual
More weak bond strength between residue stress and coating and carbide tool matrix material and the coating that causes occur to early out
Split, peeling etc. was lost efficacy.This is because the ermal physics chemical characteristic between coating and matrix material often differs greatly, cause interface
Place's stress is concentrated, and makes film substrate bond strength reduce, and coating easily ftractures, peels off.The effective measures solved are at carbide cutter tool
The polynary gradient composite coating of multilamellar is prepared on tool surface, is improved their adaptability by one or more layers intermediate layer, alleviates
The difference of the performance such as chemical bond, thermal coefficient of expansion, improves film-substrate cohesion.But the preparation work of the polynary gradient composite coating of multilamellar
Skill is the most complex, and apparatus expensive, causes cost high and is difficult to be widely popularized.
Summary of the invention
It is an object of the invention to provide a kind of hard alloy material.This hard alloy material granularity is less, particle size distribution
In 0.5-2.0um；Chemical stability is good, and chemical reaction will not occur between each material composition during wet ball grinding；Raw material
Particle shape shape mostly is spherical, and pressure embryo forming is preferable.
It is a further object of the present invention to provide a kind of method that hard alloy material prepares sintered carbide tool material.This
Loaded down with trivial details laminated coating depositing operation flow process and the device requirement of costliness are avoided in invention, with simple effective method by situ
Chemical reaction prepares sintered carbide tool material, and the sintered carbide tool material of preparation has high rigidity, high tenacity, wear-resistant etc.
Good All-around Property.
The technical scheme is that
The hard alloy material of the present invention, the component of described alloy raw material and the percentage by weight of each component be: tungsten carbide:
80-90%；Cobalt powder: 6-12%；Titanium carbide: 0-5%；Titanium nitride: 0-5%；Trace element: 0-0.5%；Described material powder grain
Degree is distributed in 0.5-2.0um；
Present invention hard alloy material prepares the method for sintered carbide tool material, is by former with hard alloy material
Position chemical reaction prepares the rich surface tungsten carbide base carbide alloy containing Ti base hard phase.
Present invention hard alloy material prepares the method for sintered carbide tool material, comprises the steps:
A) hard alloy material is added hard alloy grinding pot, add hard alloy mill ball, mix 1-3wt.%'s
Paraffin, and inject ball milling 24-48 hour after carbon tetrachloride, then it is dried；
B) dried powder body is sieved；
C) dry-pressing becomesBase substrate, then through 100-150MPa isostatic cool pressing；
D) molded blank is carried out at 600-900 DEG C presintering；
E) sample after presintering is carried out at a temperature of 1350-1450 DEG C vacuum-sintering；
F) sample after vacuum-sintering is carried out at a temperature of 1300-1400 DEG C nitrogen sintering.
What the present invention provided prepares the rich surface tungsten carbide-base hard conjunction containing Ti base hard phase by in-situ chemical reaction
Gold raw material and preparation method thereof, has the advantage that
1) present invention provide hard alloy material and preparation method, use in-situ chemical reaction at carbide matrix body surface
Face directly generates Ti base hard phase, it is to avoid complicated PVD technique deposition coating process, and preparation technology and equipment are relatively easy,
Preparation time is greatly reduced, and can shorten the production cycle of carbide tool, reduces production cost.The hard that the present invention provides closes
Gold raw material, the granularity of the powder of carbide is less than 2um, and granularity is less, and during alloy raw material mix grinding, the size of abrading-ball is joined
When the weight ratio with described hard alloy is 10:1, and ball milling is effective, and can reduce the time of ball milling, and then shortens hard conjunction
The production cycle of gold cutter, reduce production cost.
2) what the present invention provided prepares the rich surface tungsten carbide-base hard containing Ti base hard phase by in-situ chemical reaction
Alloy raw material and preparation method thereof, the hard alloy prepared has the appearance of gold or rufous.The original position that the present invention provides
The Ti base hard phase that reaction technology prepares at carbide surface has gold or rufous appearance, because being original positionization
Learn the Ti hard coat that reaction generates, therefore this coating has higher film-substrate cohesion, use scratching instrument to test its film base junction and close
Performance, loses within critical load 80N and has disbonding to lose efficacy；And through rotating speed 300r/min, time 30min continuous cutting process
In have no that coating cracking, peeling etc. were lost efficacy, compared to the Hardmetal materials without this hard phase coating, anti-wear performance and cutter longevity
Life is improved.
Hard alloy material that the present invention provides and preparation method thereof, the hard alloy prepared, critical load is more than 80N,
Service life improves 20-30%.
3) hard alloy material that the present invention provides, prepared hard alloy has that hardness is high, intensity high, life-span length excellent
Point, ensure that hardness and the toughness of hard alloy simultaneously.Tungsten carbide, cobalt powder, molybdenum powder, titanium carbide, the granularity of titanium nitride are less than
2um, purity reaches more than 99.9%, tungsten carbide, cobalt powder, molybdenum powder, titanium carbide, the height mixing of titanium nitride, and the content of molybdenum powder
All the time be 1%, the content of cobalt powder be 8-10%, cobalt powder and molybdenum powder as binding agent, molybdenum powder also is able to play refinement carbonization simultaneously
The effect of tungsten grain, the content of this cobalt powder and molybdenum powder hybrid adhesive is higher than the content of existing hardmetall binder, from
And make fine-grained tungsten carbide, titanium carbide, titanium nitride and hybrid adhesive be fully contacted, add bond area, improve viscous
Knot power, thus improve toughness and the compactness of alloy.Particularly press when tungsten carbide, cobalt powder, molybdenum powder, titanium carbide, titanium nitride
When good ratio is added, having preferable comprehensive mechanical property, effect is more preferable.Meanwhile, molybdenum powder is as grain growth inhibitor also
The misgrowth of crystal grain can be hindered, thus there is the effect making crystal grain homogenization.
Hard alloy material that the present invention provides and preparation method thereof, the hard alloy prepared, hardness is 20～28GPa,
Fracture toughness is 6～8MPa m1/2。
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this neighborhood is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
Embodiment 1:
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 86 | 10 | 1.0 | 2.5 | 0.5 |
| Percentage by weight (%) | 86 | 10 | 1.0 | 2.5 | 0.5 |
Wherein, tungsten carbide, cobalt powder, molybdenum powder, titanium carbide, the granularity of titanium nitride are all 0.5-2.0um, and purity reaches 99.9%
Above.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 150MPa isostatic cool pressing；
D, molded blank is carried out at 900 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 22.16GPa, and fracture toughness is
8.82MPa·m1/2。
Embodiment 2
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 87 | 9 | 1.0 | 0.5 | 2.5 |
| Percentage by weight (%) | 87 | 9 | 1.0 | 0.5 | 2.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 150MPa isostatic cool pressing；
D, molded blank is carried out at 750 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 22.85GPa, and fracture toughness is
8.52MPa·m1/2。
Embodiment 3
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 88 | 8 | 1.0 | 1.5 | 1.5 |
| Percentage by weight (%) | 88 | 8 | 1.0 | 1.5 | 1.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 150MPa isostatic cool pressing；
D, molded blank is carried out at 750 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1350 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 20.76GPa, and fracture toughness is
9.33MPa·m1/2。
Embodiment 4
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 85.5 | 10 | 1.0 | 1.5 | 2.0 |
| Percentage by weight (%) | 85.5 | 8 | 1.0 | 1.5 | 2.0 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 36 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 120MPa isostatic cool pressing；
D, molded blank is carried out at 800 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1350 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 26.38GPa, and fracture toughness is
6.97MPa·m1/2。
Embodiment 5
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 90 | 8 | 1.0 | 0.5 | 0.5 |
| Percentage by weight (%) | 90 | 8 | 1.0 | 0.5 | 0.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 100MPa isostatic cool pressing；
D, molded blank is carried out at 750 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1350 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 20.29GPa, and fracture toughness is
6.61MPa·m1/2。
Embodiment 6
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 84 | 10 | 1.0 | 2.5 | 2.5 |
| Percentage by weight (%) | 84 | 10 | 1.0 | 2.5 | 2.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 24 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 100MPa isostatic cool pressing；
D, molded blank is carried out at 900 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 27.85GPa, and fracture toughness is
6.27MPa·m1/2。
Embodiment 7
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 89 | 8 | 1.0 | 0.5 | 1.5 |
| Percentage by weight (%) | 89 | 8 | 1.0 | 0.5 | 1.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 24 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 120MPa isostatic cool pressing；
D, molded blank is carried out at 750 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1350 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 21.48GPa, and fracture toughness is
8.34MPa·m1/2。
Embodiment 8
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 85 | 10 | 1.0 | 2.0 | 2.0 |
| Percentage by weight (%) | 85 | 10 | 1.0 | 2.0 | 2.0 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 24 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 120MPa isostatic cool pressing；
D, molded blank is carried out at 900 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1350 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 26.28GPa, and fracture toughness is
6.75MPa·m1/2。
Embodiment 9
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 86.5 | 8 | 1.0 | 2.5 | 2.0 |
| Percentage by weight (%) | 86.5 | 8% | 1.0 | 2.5 | 2.0 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 24 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 120MPa isostatic cool pressing；
D, molded blank is carried out at 800 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1350 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 27.58GPa, and fracture toughness is
6.38MPa·m1/2。
Embodiment 10
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 87 | 9 | 1.0 | 2.0 | 1.0 |
| Percentage by weight (%) | 87 | 9 | 1.0 | 2.0 | 2.0 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 100MPa isostatic cool pressing；
D, molded blank is carried out at 800 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 25.78GPa, and fracture toughness is
6.89MPa·m1/2。
Embodiment 11
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 85.5 | 10 | 1.0 | 2.0 | 1.5 |
| Percentage by weight (%) | 85.5 | 10 | 1.0 | 2.0 | 1.5 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 120MPa isostatic cool pressing；
D, molded blank is carried out at 750 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1350 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 25.54GPa, and fracture toughness is
7.44MPa·m1/2。
Embodiment 12
(gross weight is: 100g) as follows for each component of hard alloy material and the content of each component
| Component | Tungsten carbide | Cobalt powder | Molybdenum powder | Titanium carbide | Titanium nitride |
| Weight (g) | 89.5 | 8 | 1.0 | 0.5 | 1.0 |
| Percentage by weight (%) | 89.5 | 8 | 1.0 | 0.5 | 1.0 |
Wherein, tungsten carbide, cobalt powder, nikel powder, molybdenum powder, vanadium carbide, chromium carbide, titanium carbide, carborundum, carbonitride granularity all
For 0.8-1.0um, purity reaches more than 99.9%.
Preparing sintered carbide tool material with above-mentioned hard alloy material, the step of preparation method is as follows:
A, by above-mentioned hard alloy material add grinding pot, add hard alloy mill ball, mix 1-3wt.% paraffin,
And inject ball milling 48 hours after carbon tetrachloride, then it is dried；
B, dried powder body is sieved；
C, dry-pressing becomeBase substrate, through 100MPa isostatic cool pressing；
D, molded blank is carried out at 900 DEG C presintering；
E, the sample after presintering is carried out at a temperature of 1400 DEG C vacuum-sintering；
F, the sample after vacuum-sintering is carried out at a temperature of 1300 DEG C nitrogen sintering, obtain carbide tool material
Material.
The sintered carbide tool material prepared according to above-mentioned preparation method, hardness is 21.22GPa, and fracture toughness is
7.80MPa·m1/2。
The foregoing is only presently preferred embodiments of the present invention, be not limited to the present invention, all protection models in the present invention
Enclose interior made any amendment, equivalent etc., should be included within the scope of the present invention.
Claims (10)
1. a hard alloy material, it is characterised in that the component of described alloy raw material and the percentage by weight of each component be: carbon
Change tungsten: 80-90%；Cobalt powder: 6-12%；Titanium carbide: 0-5%；Titanium nitride: 0-5%；Trace element: 0-0.5%；Described raw material
Powder granularity is distributed in 0.5-2um.
Hard alloy material the most according to claim 1, it is characterised in that the component of described alloy raw material and each component
Percentage by weight is tungsten carbide: 84-90%；Molybdenum powder: 1%；Cobalt powder: 8-10%；Titanium carbide: 0.5-2.5%；Titanium nitride: 0.5-
2.5%；Trace element: 0-0.5%.
Hard alloy material the most according to claim 1, it is characterised in that described tungsten carbide, cobalt powder, titanium carbide, titanium nitride
Granularity less than 2um, purity reaches more than 99.9%.
4. the method preparing sintered carbide tool material with hard alloy material described in claim 1, it is characterised in that hard
Matter alloy raw material prepares the rich surface tungsten carbide base carbide alloy containing Ti base hard phase by in-situ chemical reaction.
Hard alloy material the most according to claim 4 prepares the method for sintered carbide tool material, it is characterised in that
Comprise the steps:
A) hard alloy material is added hard alloy grinding pot, adds hard alloy mill ball, mix the paraffin of 1-3wt.%,
And inject ball milling 24-48 hour after carbon tetrachloride, then it is dried；
B) dried powder body is sieved；
C) dry-pressing becomesBase substrate, then through 100-150MPa isostatic cool pressing；
D) molded blank is carried out at 600-900 DEG C presintering；
E) sample after presintering is carried out at a temperature of 1350-1450 DEG C vacuum-sintering；
F) sample after vacuum-sintering is carried out at a temperature of 1300-1400 DEG C nitrogen sintering.
Hard alloy material the most according to claim 5 prepares the method for sintered carbide tool material, it is characterised in that
In step a), grinding pot is hard alloy grinding pot, and hard alloy mill ball is 5:1-10 with the weight ratio of hard alloy material:
1。
Hard alloy material the most according to claim 5 prepares the method for sintered carbide tool material, it is characterised in that
In step c), the pressure rising time of 100-150MPa isostatic cool pressing is 5-10 minute, and the dwell time is 5-10 minute.
Hard alloy material the most according to claim 5 prepares the method for sintered carbide tool material, it is characterised in that
In step d), it is 10E in vacuum-1-10E-2Presintering is carried out under Pa；In described step e), it is 10E in vacuum-2-10E- 3Vacuum-sintering is carried out under Pa.
Hard alloy material the most according to claim 6 prepares the method for sintered carbide tool material, it is characterised in that
In step f), under nitrogen pressure is 0.11-0.12MPa, carry out nitrogen sintering.
Hard alloy material the most according to claim 5 prepares the method for sintered carbide tool material, it is characterised in that
The addition manner of described forming agent is: first the hard paraffin of 1-3wt.% is dissolved under the conditions of 50-70 DEG C carbon tetrachloride molten
Grinding pot is inserted again after agent.
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