CN106350721B - A kind of preparation method of plate crystal structure high-performance WC-Co hard alloy - Google Patents
A kind of preparation method of plate crystal structure high-performance WC-Co hard alloy Download PDFInfo
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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
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- 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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- 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
- B22F3/1039—Sintering only by reaction
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
- B22F9/26—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
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- C22C1/04—Making non-ferrous alloys by powder metallurgy
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- 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
- C22C1/055—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 using carbon
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- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The present invention relates to a kind of preparation methods of plate crystal structure high-performance WC Co hard alloy；Belong to cemented carbide material and preparation field.The preparation method is：Using each component disperse and the W/Co/C composite powders that are evenly distributed is raw materials, by adjusting after carbon, wet-milling, drying, compression moulding in 1,380 1460 DEG C of carburizing sinterings, obtain plate crystal structure high-performance WC Co hard alloy；Contain W nanopowder and plate crystalline substance W in the W/Co/C composite powders powder.The present invention at a lower temperature the sintering short period can obtain almost densification, high comprehensive performance novel complete fine and close plate crystal structure high-performance WC Co hard alloy, there is important prospects for commercial application in the various manufacture fields such as turning, drilling, milling and as coated carbides matrix etc..
Description
Technical field
The present invention relates to a kind of preparation methods of plate crystal structure high-performance WC-Co hard alloy；Belong to hard alloy material
Material and preparation field.
Background technology
Hard phase WC in WC-Co hard alloy is the aeolotropic crystal for belonging to hexagonal crystal system, if its hardness is higher
Bottom surface (001) face is preferentially grown up, then will usually change generating plate-like shape WC grains in the WC grain of triangle or polygonal prism-shaped body shape,
While promoting the raising of WC-Co hard alloy integral hardness, be conducive to improve the fracture toughness of alloy.Usual low cobalt two-phase WC-
The fracture toughness KIC of Co hard alloy depends primarily on the volume fraction of γ phases and its mean free path and ingredient, fine to split
Line forms at more weak WC/WC crystal boundaries face, WC/Co boundaries and extends or be broken across Binder Phase, and plate is brilliant hard
In matter alloy, micro-crack can then be extended by a variety of different approach such as crack deflection, bridge joint or extraction, transgranular fracture.Plate
It is comprehensive that cemented carbide has that hardness high, wearability and plasticity_resistant deformation ability are strong, high tenacity and thermal shock resistance are good etc.
Can, it shows fabulous effect in manufacture fields such as turning, drilling, millings and as coated carbides matrix etc., is
The new developing direction in hard alloy field.
At present, by adding other substances (such as TiC, Y2O3, plate WC crystal seeds etc.) with reference to high temperature, high-pressure sinter induction WC
Crystal grain develops to plate, can prepare the hard alloy containing plate-like shape WC grains, but these preparation methods are in the prevalence of plate WC crystalline substances
The quantity and size of grain are difficult to control, plate-like grain ratio is few or grain orientation is poor, and special agglomerating plant etc. is needed to lack
Point so that the comprehensive performances such as hardness, toughness of hard alloy cannot effectively improve, and apply limited.Using with plate
The W powder and graphite of pattern are raw material, and chemical synthesis plate-like shape WC grains are the effective ways for preparing plate cemented carbide, but alloy
It is difficult to sintering densification.
Invention content
It is high to provide a kind of novel complete fine and close plate crystal structure for the deficiency that the purpose of the present invention is be directed in existing preparation process
The preparation method of performance WC-Co hard alloy.
A kind of preparation method of plate crystal structure high-performance WC-Co hard alloy of the present invention, includes the following steps：
Using each component disperse and the W/Co/C composite powders that are evenly distributed is raw materials, by adjusting carbon, wet-milling, drying, compacting
In 1380-1460 DEG C of carburizing sintering after molding, plate crystal structure high-performance WC-Co hard alloy is obtained；The W/Co/C
Contain W nanopowder and plate crystalline substance W in composite powder powder.
Preferably；The each component disperse and W/Co/C composite powders being evenly distributed are by following proposal system
Standby：
It is a nanometer tungsten source using water-soluble tungsten salt, cobalt salt is contained as cobalt source using water solubility, nanometer tungsten source, cobalt source, carbon source is molten
In alcohol water blend after mixing, mixture A is obtained；Then laminar W powder is added in mixing A, after mixing
It is dry, obtain dry mixture B；Mixture B is restored under reducing atmosphere in 560-820 DEG C, obtains each component disperse
And the W/Co/C composite powders being evenly distributed；The radius-thickness ratio of the flake W powder is：5:1-20:1 and a diameter of 5-30 is micro-
Rice；The mass ratio of the flake W powder and nano powder C are 4:1-9:1, the powder C are the reason that nanometer tungsten source is reduced into tungsten
By value.
Scheme as a further preference,
It is a nanometer tungsten source using water-soluble tungsten salt, cobalt salt is contained as cobalt source using water solubility, by nanometer tungsten source, cobalt source, carbon source, adds
Agent is added to be dissolved in alcohol water blend after mixing, obtains mixture E；Then laminar W powder is added in mixture E, mixed
It is dry after closing uniformly, obtain dry mixture D；Mixture D carries out reduction 120- in 560-820 DEG C under reducing atmosphere
300min, the W/Co/C composite powders for obtaining each component disperse and being evenly distributed；The radius-thickness ratio of the flake W powder is：5:
1-20:1 and 5-30 microns a diameter of；The mass ratio of the flake W powder and nano powder C are 4:1-9:1, the powder C are
Nanometer tungsten source is reduced into the theoretical value of tungsten；The additive contains vanadic salts to be water-soluble.The water-soluble vanadic salts that contains is ammonium metavanadate
Or chromic nitrate.In order to further enhance effect, in the mixture E, by quality ratio, water-soluble tungsten salt：Water-soluble carbon source：
Water solubility contains vanadic salts=10-20:15-30:30-60:1-2.5.The mass percentage content of the middle alcohol of the alcohol water blend
For 10-30%.The mass ratio of solute and solvent is 10 in the mixture E:8-10:6.
Scheme as a further preference, the water solubility tungsten salt is metatungstic acid ammonia.
Scheme as a further preference, the water-soluble cobalt salt that contains is cobalt nitrate.
Scheme as a further preference, the carbon source are reducing sugar.The reducing sugar is more preferably grape
Sugar or sucrose.
In industrial applications, laminar W powder is added in mixture E or mixture A, after mixing using vacuum
Heating evaporation or spray drying.
In industrial applications, mixture B or mixing D are restored after ball milling in 560-820 DEG C under reducing atmosphere
120-300min, the W/Co/C composite powders for obtaining each component disperse and being evenly distributed.The condition of the ball milling is：Rotating speed(rev/min, D be mill tube diameter/rice) i.e. 0.5-1.1m/s, ball material mass ratio 5:1-10:1.
As further preferred embodiment, mixture B or mixing D are put into five band temperature control continous ways, four pipe gas after ball milling
In-situ carbon auxiliary hydrogen reduction is carried out in atmosphere Muffle reduction furnace, reduction temperature is divided into 5 stages；The temperature in 5 stages
Be controlled as 560 DEG C -600 DEG C, 600 DEG C -640 DEG C, 640 DEG C -680 DEG C, 700 DEG C -760 DEG C, 760 DEG C -820 DEG C, it is described also
The former time is 300min, using inert gases Passivation Treatments such as nitrogen before coming out of the stove.During reduction, hydrogen is excessive.
Preferably；It is described tune carbon be：It is added in into each component disperse and the W/Co/C composite powders that are evenly distributed
Powdery paraffin；The quality of added in powdery paraffin is each component disperse and the 2.0- of W/Co/C composite powder quality being evenly distributed
3.0%.
Preferably；During the wet-milling, control rotating speed is：(rev/min, D is mill tube diameter/rice) i.e.
0.5-1.1m/s, control ball material mass ratio are 4:1-6:1st, control Ball-milling Time is 24-60 hours；Ball-milling medium used during wet-milling
Preferably alcohol, the alcohol amount that per kilogram powder adds in are 300-400 milliliters.
Preferably；The pressure of the compression moulding is 130-180MPa.
Preferably；It is 90-120min in the time of 1380-1460 DEG C of carburizing sintering.As further excellent
Scheme is selected, the temperature of a carburizing sintering is 1410-1440 DEG C.During carburizing sintering, preferred hydrogen molybdenum wire furnace.
A kind of preparation method of plate crystal structure high-performance WC-Co hard alloy of the present invention, the quality of prepared cobalt
The performance for the WC-Co hard alloy that percentage composition is 8.5-10.5% is：
Relative density is more than equal to 98.77%, preferably 98.77-99.15%, and coercivity is more than or equal to 18.25KAm-1, preferably 18.25-19.25KAm-1, fracture toughness KIC is more than or equal to 14.17MPam1/2, preferably 14.17-
14.34MPa·m1/2, HV30 is more than or equal to 1500kgfmm-2, further preferably 1500-1550kgfmm-2。
Principle and advantage
The nanometer witch culture plate crystalline substance W/Co/C composite powders that each component is evenly distributed can be prepared using the above method, this is multiple
Green compact made from closing powder leads in molybdenum filament in hydrogen sintering furnace, be sintered at a lower temperature the short period can obtain it is almost fine and close
Change, the novel complete fine and close plate crystal structure high-performance WC-Co hard alloy of high comprehensive performance, hardness and sub- fine alloy board
Number hardness it is suitable, and show obvious anisotropy, and fracture toughness is then substantially better than the corresponding thin trade mark alloy of sub-micro
Performance, the various manufacture fields such as turning, drilling, milling and as coated carbides matrix etc. have important work
Industry application prospect.
The sintering shrinkage densification of WC-Co hard alloy of the present invention, except the solid-phase sintering stage passes through bonding under higher temperature
Metal plastic flowing and outside the drastically contraction that generates, the key for obtaining full compact texture alloy is WC particle under the liquid-phase sintering stage
Carry out adequately dense arrangement and the contraction generated due to solution modeling mechanism again.As the main material of WC-Co hard alloy,
WC Powder Particle Size narrowly distributings are usually required that, in normal distribution.Size distribution can influence the roughening of crystal grain, and distribution is wider, crystal grain
Roughening is more serious.In-situ preparation nanometer W particles of the present invention, in carbonization, sintering process, due to having higher specific surface
Can, alloy system interior energy is significantly increased, may just take the lead in carbonization generation nanometer WC in the lower temperature solid-phase sintering stage, and
Promoting occur liquid phase earlier, while effectively facilitating alloy sintering contraction densification, because of crystallization of the dissolution and precipitation mechanism, thinner receives
Rice WC grain preferentially dissolves, and be preferentially precipitated on larger plate-like grain, promotes WC grain that two-dimentional shape further occurs
Core is grown up, the more coarseer plate-like shape WC grains of generation.
Description of the drawings
Fig. 1 is the SEM photograph of nanometer witch culture plate crystalline substance W/Co/C composite powders that embodiment 1 is prepared.
Fig. 2 is the SEM photograph of novel plate shaped crystal WC-Co structure hard alloy that embodiment 1 is prepared.
Fig. 3 is the SEM photograph of novel plate shaped crystal WC-Co structure hard alloy that comparative example 1 is prepared.
Specific embodiment
The present invention will be described further by following embodiment, and but the scope of the present invention is not limited thereto.
Embodiment 1
2.0 grams of 24 grams of metatungstic acid ammonia, 27 grams of DEXTROSE ANHYDROUS, 50 grams of cobalt nitrate and chromic nitrate are weighed, is dissolved in alcohol, treats
After being sufficiently mixed, the laminar W powder of 70 grams of ball milling inductive formations, (Ball-milling Time 2h, ball material after ball milling mixing is uniform are added in
Than being 10：1) method of ball milling prepares the presoma mixed-powder of reduction after, being evaporated using heating in vacuum.By presoma
Powder, which is put into five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace, carries out in-situ carbon auxiliary hydrogen reduction, reduction temperature 560-
600-640-700-760 DEG C, recovery time 300min, excessive big hydrogen flowing quantity, using the passivation of the inert gases such as nitrogen before coming out of the stove
Processing.Obtained composite powder after adjusting the mixing of carbon dispensing after testing, again, adds in weight percent as 2.5% powdery paraffin and suitable
Alcohol is measured, continues ball milling 48 hours, mixture is obtained after vacuum drying, it is then repressed, and in 1410 in logical hydrogen molybdenum wire furnace
DEG C, a carburizing sintering 90min prepares novel plate shaped crystal structure high-performance WC-Co hard alloy.The nanometer tungsten prepared is mixed
Miscellaneous plate crystalline substance W/Co/C composite powders and its a carburizing sintering obtain novel plate shaped crystalline substance WC-10wt%Co structure hard alloys
Stereoscan photograph is shown in attached drawing 1 and attached drawing 2 respectively, can be seen that from Fig. 1,2:Nanometer tungsten, cobalt and carbon black are adhered tightly to flat
Flat-shaped tungsten particle surface, is distributed in even dispersion；It is in triangle or polygonal prism different from WC grain in traditional WC-Co alloys
Shape, novel plate shaped crystalline substance WC-10wt%Co Mathematical Analysis of Al-li Alloy Containing Rare Earth even structures, WC grain is by a large amount of pancake plate-like shape WC grains
WC grain composition ultra-fine with minute quantity.Obtained Cemented Carbide Properties testing result for details see attached table 1.
Embodiment 2
2.0 grams of 20 grams of metatungstic acid ammonia, 27 grams of DEXTROSE ANHYDROUS, 50 grams of cobalt nitrate and chromic nitrate are weighed, is dissolved in alcohol, treats
After being sufficiently mixed, the laminar W powder of 73 grams of ball milling inductive formations, (Ball-milling Time 2h, ball material after ball milling mixing is uniform are added in
Than being 10：1) method of ball milling prepares the presoma mixed-powder of reduction after, being evaporated using heating in vacuum.By presoma
Powder, which is put into five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace, carries out in-situ carbon auxiliary hydrogen reduction, reduction temperature 600-
640-680-760-820 DEG C, recovery time 300min, excessive big hydrogen flowing quantity, using the passivation of the inert gases such as nitrogen before coming out of the stove
Processing.Obtained composite powder after adjusting the mixing of carbon dispensing after testing, again, adds in weight percent as 2.5% powdery paraffin and suitable
Alcohol is measured, continues ball milling 48 hours, mixture is obtained after vacuum drying, it is then repressed, and in 1410 in logical hydrogen molybdenum wire furnace
DEG C, a carburizing sintering 90min prepares novel plate shaped crystal structure high-performance WC-Co hard alloy.Obtained Cemented Carbide Properties inspection
It surveys the results detailed in subordinate list 1.
Embodiment 3
2.0 grams of 17 grams of metatungstic acid ammonia, 27 grams of DEXTROSE ANHYDROUS, 50 grams of cobalt nitrate and chromic nitrate are weighed, is dissolved in alcohol, treats
After being sufficiently mixed, the laminar W powder of 75 grams of ball milling inductive formations, (Ball-milling Time 2h, ball material after ball milling mixing is uniform are added in
Than being 10：1) method of ball milling prepares the presoma mixed-powder of reduction after, being evaporated using heating in vacuum.By presoma
Powder, which is put into five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace, carries out in-situ carbon auxiliary hydrogen reduction, reduction temperature 560-
600-640-700-760 DEG C, recovery time 300min, excessive big hydrogen flowing quantity, using the passivation of the inert gases such as nitrogen before coming out of the stove
Processing.Obtained composite powder after adjusting the mixing of carbon dispensing after testing, again, adds in weight percent as 2.5% powdery paraffin and suitable
Alcohol is measured, continues ball milling 48 hours, mixture is obtained after vacuum drying, it is then repressed, and in 1410 in logical hydrogen molybdenum wire furnace
DEG C, a carburizing sintering 120min prepares novel plate shaped crystal structure high-performance WC-Co hard alloy.Obtained Cemented Carbide Properties
Testing result for details see attached table 1.
Embodiment 4
2.0 grams of 13 grams of metatungstic acid ammonia, 27 grams of DEXTROSE ANHYDROUS, 50 grams of cobalt nitrate and chromic nitrate are weighed, is dissolved in alcohol, treats
After being sufficiently mixed, the laminar W powder of 78 grams of ball milling inductive formations, (Ball-milling Time 2h, ball material after ball milling mixing is uniform are added in
Than being 10：1) method of ball milling prepares the presoma mixed-powder of reduction after, being evaporated using heating in vacuum.By presoma
Powder, which is put into five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace, carries out in-situ carbon auxiliary hydrogen reduction, reduction temperature 560-
600-640-700-760 DEG C, recovery time 300min, excessive big hydrogen flowing quantity, using the passivation of the inert gases such as nitrogen before coming out of the stove
Processing.Obtained composite powder after adjusting the mixing of carbon dispensing after testing, again, adds in weight percent as 2.5% powdery paraffin and suitable
Alcohol is measured, continues ball milling 48 hours, mixture is obtained after vacuum drying, it is then repressed, and in 1440 in logical hydrogen molybdenum wire furnace
DEG C, a carburizing sintering 90min prepares novel plate shaped crystal structure high-performance WC-Co hard alloy.Obtained Cemented Carbide Properties inspection
It surveys the results detailed in subordinate list 1.
Comparative example 1
2.0 grams of 0 gram of metatungstic acid ammonia, 27 grams of DEXTROSE ANHYDROUS, 50 grams of cobalt nitrate and chromic nitrate are weighed, is dissolved in alcohol, treats
After being sufficiently mixed, the laminar W powder of 87.30 grams of ball milling inductive formations is added in, after ball milling mixing is uniform (Ball-milling Time 2h,
Ratio of grinding media to material is 10：1) method of ball milling prepares the presoma mixed-powder of reduction after, being evaporated using heating in vacuum.By before
It drives body powder and is put into the auxiliary hydrogen reduction of progress in-situ carbon, reduction temperature in five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace
560-600-640-700-760 DEG C, recovery time 300min, excessive big hydrogen flowing quantity, using inert gases such as nitrogen before coming out of the stove
Passivation Treatment.Obtained composite powder, after adjusting the mixing of carbon dispensing after testing, again, addition weight percent is 2.5% powdery paraffin
And suitable alcohols, continue ball milling 48 hours, mixture obtained after vacuum drying, it is then repressed, and in logical hydrogen molybdenum wire furnace in
1410 DEG C, a carburizing sintering 90min prepares novel plate shaped crystal structure high-performance WC-Co hard alloy.Obtained hard alloy
It can testing result for details see attached table 1.
The performance test results of WC-10wt%Co sintered bodies that the different embodiments of table 1 are produced
P：Pressure surface；V：Vertical pressure surface.
Claims (9)
1. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy, it is characterised in that include the following steps：
Using each component disperse and the W/Co/C composite powders that are evenly distributed is raw materials, by adjusting carbon, wet-milling, drying, compression moulding
Afterwards in 1380-1460 DEG C of carburizing sintering, plate crystal structure high-performance WC-Co hard alloy is obtained；The W/Co/C is compound
Contain W nanopowder and plate crystalline substance W in powder；
The each component disperse and W/Co/C composite powders being evenly distributed are prepared by following proposal：
It is a nanometer tungsten source using water-soluble tungsten salt, cobalt salt is contained as cobalt source using water solubility, nanometer tungsten source, cobalt source, carbon source is dissolved in wine
In smart aqueous solution after mixing, mixture A is obtained；Then laminar W powder is added in mixing A, dried after mixing,
Obtain dry mixture B；Mixture B is restored under reducing atmosphere in 560-820 DEG C, obtains each component disperse and distribution
Uniform W/Co/C composite powders；The radius-thickness ratio of the flake W powder is：5:1-20:1 and 5-30 microns a diameter of；It is described
The mass ratio of laminar W powder and nano powder C are 4:1-9:1, the nano powder C are the theoretical value that nanometer tungsten source is reduced into tungsten.
2. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1, feature exist
In：
It is a nanometer tungsten source using water-soluble tungsten salt, cobalt salt is contained as cobalt source using water solubility, by nanometer tungsten source, cobalt source, carbon source, additive
It is dissolved in alcohol water blend after mixing, obtains mixture E；Then laminar W powder is added in mixture E, mixing is equal
It is dry after even, obtain dry mixture D；Mixture D carries out reduction 120-300 min in 560-820 DEG C under reducing atmosphere,
The W/Co/C composite powders for obtaining each component disperse and being evenly distributed；The radius-thickness ratio of the flake W powder is：5:1-20:1 and
It is 5-30 microns a diameter of；The mass ratio of the flake W powder and nano powder C are 4:1-9:1, the nano powder C are nanometer tungsten
Source is reduced into the theoretical value of tungsten；The additive contains chromic salts to be water-soluble.
3. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 2, feature exist
In；
In the mixture E, by quality ratio, water-soluble tungsten salt：Water-soluble carbon source：Water solubility contains chromic salts=10-20:15-
30:30-60:1-2.5；
The water solubility tungsten salt is metatungstic acid ammonia；
The water-soluble cobalt salt that contains is cobalt nitrate；
The carbon source is reducing sugar；The reducing sugar is glucose or sucrose.
4. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1 or 2, special
Sign is；
Mixture B or mixture D carry out reduction 120-300 min in 560-820 DEG C, obtain under reducing atmosphere after ball milling
Each component disperse and the W/Co/C composite powders being evenly distributed；The condition of the ball milling is：Rotating speed 0.5-1.1m/s, ball material matter
Measure ratio 5:1-10:1, control Ball-milling Time is 32-60 hours.
5. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1 or 2, special
Sign is；
It is auxiliary that mixture B or mixing D is put into progress in-situ carbon in five band temperature control continous ways, four pipe atmosphere Muffle reduction furnace after ball milling
Hydrogen reduction is helped, reduction temperature is divided into 5 stages；The temperature in 5 stages be controlled as 560 DEG C -600 DEG C, 600
DEG C -640 DEG C, 640 DEG C -680 DEG C, 700 DEG C -760 DEG C, 760 DEG C -820 DEG C, the time of the reduction is 300 min, is adopted before coming out of the stove
With nitrogen inerting processing.
6. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1, feature exist
It is in the tune carbon：Powdery paraffin is added in into each component disperse and the W/Co/C composite powders that are evenly distributed；Added in powdery
The quality of paraffin is each component disperse and the 2.0-3.0% of W/Co/C composite powder quality being evenly distributed.
7. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1, feature exist
In：
During wet-milling, control rotating speed is 0.5-1.1m/s, control ball material mass ratio is 4:1-6:1st, control Ball-milling Time is small for 24-60
When；
During compression moulding, control pressure 130-180MPa.
8. a kind of preparation method of plate crystal structure high-performance WC-Co hard alloy according to claim 1, feature exist
In：It is 90-120 min in the time of 1380-1460 DEG C of carburizing sintering；During carburizing sintering, sintering furnace used is hydrogen
Molybdenum wire furnace.
9. a kind of plate crystal structure high-performance WC-Co hard alloy according to 1,2,3,7,8 any one of claim
Preparation method, it is characterised in that：The mass percentage of prepared cobalt is the property of the WC-Co hard alloy of 8.5-10.5%
Can be：
Relative density, which is more than, is equal to 98.77%；
Coercivity is more than or equal to 18.25 KAm-1；
Fracture toughness KICMore than or equal to 14.17 MPa m1/2；
HV30 is more than or equal to 1500 kgf mm-2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802006.XA CN106350721B (en) | 2016-09-05 | 2016-09-05 | A kind of preparation method of plate crystal structure high-performance WC-Co hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN108237221B (en) * | 2018-03-14 | 2019-09-27 | 北京工业大学 | A kind of preparation method of the WC-Co hot spray powder with liquid-phase sintering tissue signature |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285134A (en) * | 2008-05-30 | 2008-10-15 | 华南理工大学 | Preparation method for WC-Co cemented carbide |
| CN101633502A (en) * | 2009-08-13 | 2010-01-27 | 南昌硬质合金有限责任公司 | Method for preparing micro-fine and nanometer particle tungsten carbide |
| CN102887512A (en) * | 2012-10-18 | 2013-01-23 | 南昌大学 | Method for preparing nano-tungsten carbide |
-
2016
- 2016-09-05 CN CN201610802006.XA patent/CN106350721B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285134A (en) * | 2008-05-30 | 2008-10-15 | 华南理工大学 | Preparation method for WC-Co cemented carbide |
| CN101633502A (en) * | 2009-08-13 | 2010-01-27 | 南昌硬质合金有限责任公司 | Method for preparing micro-fine and nanometer particle tungsten carbide |
| CN102887512A (en) * | 2012-10-18 | 2013-01-23 | 南昌大学 | Method for preparing nano-tungsten carbide |
Non-Patent Citations (2)
| Title |
|---|
| W 粉末的形貌结构对板状晶硬质合金的组织与性能的影响;雷纯鹏等;《稀有金属材料与工程》;20160831;第45卷(第8期);第2146-2149页 * |
| W/WC粉末的形貌结构及其对WC-Co硬质合金组织和性能的影响;雷纯鹏;《中国博士学位论文全文数据库 工程科技I辑》;20140615(第6期);第35,97页 * |
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