CN115961197A - Hard alloy material for wear-resistant wearing part and preparation method thereof - Google Patents
Hard alloy material for wear-resistant wearing part and preparation method thereof Download PDFInfo
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- CN115961197A CN115961197A CN202211714386.3A CN202211714386A CN115961197A CN 115961197 A CN115961197 A CN 115961197A CN 202211714386 A CN202211714386 A CN 202211714386A CN 115961197 A CN115961197 A CN 115961197A
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- 239000000956 alloy Substances 0.000 title claims abstract description 104
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 113
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 93
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000002114 nanocomposite Substances 0.000 claims abstract description 43
- 239000010941 cobalt Substances 0.000 claims abstract description 42
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 42
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 26
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000227 grinding Methods 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000011812 mixed powder Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 7
- 238000007873 sieving Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000007550 Rockwell hardness test Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides a hard alloy material for wear-resistant wearing parts and a preparation method thereof, wherein the hard alloy material comprises, by mass, 0-10 wt% of titanium carbide, 20-40 wt% of nickel-based tungsten carbide alloy powder, 10-30 wt% of tungsten carbide powder, 0-20 wt% of aluminum titanium nitride powder and 10-20 wt% of tungsten carbide cobalt nano composite powder. The preparation method comprises the following steps: s1, uniformly mixing the raw materials according to a ratio to obtain a material; s2, adding the materials into a grinder for grinding, and sieving to obtain 200-mesh particles to obtain mixed powder; s3, pressing and forming the mixed powder; and S4, sintering, and cooling to obtain the hard alloy material. The preparation method is simple and feasible, can be used for mass production, finally prepares the hard alloy material with stronger wear resistance and longer service life, is more durable and wear-resistant in the use process of the easily damaged part, and prolongs the service life and the working efficiency of the workpiece.
Description
Technical Field
The invention belongs to the technical field of hard alloy material production, and particularly relates to a hard alloy material for a wear-resistant wearing part and a preparation method thereof.
Background
The hard alloy has a series of excellent performances such as high hardness, wear resistance, heat resistance, corrosion resistance and the like, and is widely applied to the fields of metal processing, mining and the like, but the hard alloy has high manufacturing cost and high brittleness, and is not suitable for easily-worn parts with high impact force.
The existing hard alloy can cause serious abrasion after being used for a long time in the production and manufacturing process, the oxidation resistance of the refractory carbide is equivalent to that of WC (tungsten carbide), and if the strength of the hard alloy can not be improved, the hard alloy is inconvenient in the use process of a machine core, so that the processing is influenced.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a hard alloy material for a wear-resistant wearing part and a preparation method thereof, which are used for solving the problems that the hard alloy in the prior art is easy to wear and has insufficient strength.
In order to achieve the above objects and other related objects, the present invention provides a hard alloy material for wear-resistant wearing parts, which comprises, by mass, 0 to 10wt% of titanium carbide, 20 to 40wt% of nickel-based tungsten carbide alloy powder, 10 to 30wt% of tungsten carbide powder, 0 to 20wt% of aluminum titanium nitride powder, and 10 to 20wt% of tungsten carbide cobalt nano composite powder.
Preferably, the nickel-based tungsten carbide alloy powder comprises, in mass percent, 60wt% of Ni and 40wt% of WC.
Preferably, the tungsten carbide cobalt nano composite powder comprises 88wt% of WC and 12wt% of Co; the tungsten carbide cobalt nano composite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 50-100 nm.
The invention also provides a preparation method of the hard alloy material for the wear-resistant wearing part, which comprises the following steps:
s1, uniformly mixing titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder and aluminum titanium nitride powder according to a ratio, adding a certain amount of tungsten carbide cobalt nano composite powder, and uniformly mixing to obtain a material;
s2, adding the materials into a grinder for grinding, and sieving to obtain 200-mesh particles to obtain mixed powder;
s3, putting the mixed powder into a die for compression molding to obtain a material block;
and S4, sintering the material block, and cooling to obtain the hard alloy material.
Preferably, in the hard alloy material, in step S1, the titanium carbide accounts for 0 to 10wt%, the nickel-based tungsten carbide alloy powder accounts for 20 to 40wt%, the tungsten carbide powder accounts for 10 to 30wt%, the aluminum titanium nitride powder accounts for 0 to 20wt%, and the tungsten carbide cobalt nano composite powder accounts for 10 to 20wt%.
Preferably, the nickel-based tungsten carbide alloy powder in the step S1 includes, in mass percent, 60wt% of Ni and 40wt% of WC.
Preferably, the tungsten carbide cobalt nano composite powder in the step S1 comprises 88wt% of WC and 12wt% of Co by mass percentage, and is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 50nm to 100nm.
Preferably, the rotation speed of the grinding in the step S2 is 80-200 r/min, and the grinding time is 10-20 h.
Preferably, the pressure of the press molding in the step S3 is 200 to 500MPa.
Preferably, the sintering in step S4 is specifically: heating to 1500-1600 ℃ under the vacuum degree of 5-20 pa, preserving heat for 2h, then filling argon to the vacuum degree of 5Mpa, and continuously preserving heat and pressure for 2h.
Preferably, the cooling in the step S4 includes a first cooling, a second cooling and a final cooling, wherein the first cooling is cooling to 1000-1200 ℃, and keeping the temperature for 2 hours; the second cooling is to cool the mixture to 500 ℃ and preserve heat for 2 hours; and finally, rapidly cooling the mixture to room temperature in water with the temperature of 0-5 ℃.
As mentioned above, the hard alloy material for the wear-resistant wearing part and the preparation method thereof have the following beneficial effects:
the hard alloy material provided by the invention is composed of titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder, aluminum titanium nitride powder and tungsten carbide cobalt nano composite powder, wherein the nickel-based tungsten carbide alloy powder and the tungsten carbide are used as main basic components and have the characteristics of wear resistance, high temperature resistance and high hardness, the titanium carbide has the characteristics of high hardness, corrosion resistance and good special stability, the aluminum titanium nitride powder plays the roles of corrosion resistance, high temperature resistance and oxidation resistance, and then the hard alloy material with the remarkably improved surface wear resistance can be obtained by adding the tungsten carbide cobalt nano composite powder and adjusting the proportion of the raw materials.
The method is simple and easy to implement, can be used for mass production, and the finally prepared hard alloy material for the wear-resistant wearing part has stronger wear resistance and longer service life, can be more durable and wear-resistant in the use process of the wearing part, and increases the service life and the working efficiency of the workpiece.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The invention provides a hard alloy material for a wear-resistant wearing part, which comprises, by mass, 0-10 wt% of titanium carbide, 20-40 wt% of nickel-based tungsten carbide alloy powder, 10-30 wt% of tungsten carbide powder, 0-20 wt% of aluminum titanium nitride powder and 10-20 wt% of tungsten carbide cobalt nano composite powder.
Specifically, in the hard alloy material, the titanium carbide may include, by mass, any range of values such as 0wt%, 2wt%, 4wt%, 6wt%, 8wt%, 10wt%, and the like, which may be adjusted according to the actual application; the nickel-based tungsten carbide alloy powder can comprise the numerical values of 20wt%, 25wt%, 30wt%, 35wt%, 40wt% and the like, and can be adjusted according to the actual conditions; the tungsten carbide powder can comprise 10wt%, 15wt%, 20wt%, 25wt%, 30wt% and other numerical values in any range, and can be adjusted according to actual conditions; the aluminum titanium nitride powder can comprise values in any range of 0wt%, 5wt%, 10wt%, 15wt%, 20wt%, and the like, and can be adjusted according to the actual situation; the tungsten carbide cobalt nano composite powder can comprise values in any range of 10wt%, 12wt%, 14wt%, 16wt%, 18wt%, 20wt%, and the like, and can be adjusted according to actual conditions.
As an example, the nickel-based tungsten carbide alloy powder includes, in mass percent, 60wt% Ni and 40wt% WC.
Specifically, the specific preparation method of the nickel-based tungsten carbide alloy powder is a method known to those skilled in the art, and is not limited herein.
As an example, the tungsten carbide cobalt nanocomposite powder comprises, in mass percent, 88wt% WC and 12wt% Co; the tungsten carbide cobalt nano composite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 50 nm-100 nm.
Specifically, the D50 particle size of the tungsten carbide cobalt nano-composite powder may include values in any range of 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, etc., and the preparation method of the tungsten carbide cobalt nano-composite powder is not limited too.
The invention also provides a preparation method of the hard alloy material for the wear-resistant wearing part, which comprises the following steps:
s1, uniformly mixing titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder and aluminum titanium nitride powder according to a ratio, adding a certain amount of tungsten carbide cobalt nano composite powder, and uniformly mixing to obtain a material;
s2, adding the materials into a grinder for grinding, and sieving to obtain 200-mesh particles to obtain mixed powder;
s3, putting the mixed powder into a die for compression molding to obtain a material block;
and S4, sintering the material block, and cooling to obtain the hard alloy material.
Specifically, the nickel-based tungsten carbide alloy powder is used as a main basic component of the hard alloy, and has high wear resistance and high temperature resistance; the titanium carbide powder has the characteristics of high hardness, corrosion resistance and good thermal stability as an important component of the hard alloy; the tungsten carbide powder also serves as a basic component of the hard alloy, the aluminum titanium nitride powder mainly plays a role in corrosion resistance, high temperature resistance and oxidation resistance, and the tungsten carbide cobalt nano composite powder also serves to remarkably improve the surface wear resistance of the material.
By way of example, in the cemented carbide material, titanium carbide in step S1 accounts for 0 to 10wt% (e.g., 0wt%, 2wt%, 4wt%, 6wt%, 8wt%, 10wt%, etc.), nickel-based tungsten carbide alloy powder accounts for 20 to 40wt% (e.g., 20wt%, 25wt%, 30wt%, 35wt%, 40wt%, etc.), tungsten carbide powder accounts for 10 to 30wt% (e.g., 10wt%, 15wt%, 20wt%, 25wt%, 30wt%, etc.), aluminum titanium nitride powder accounts for 0 to 20wt% (e.g., 0wt%, 5wt%, 10wt%, 15wt%, 20wt%, etc.), tungsten carbide cobalt nanocomposite powder accounts for 10 to 20wt% (e.g., 10wt%, 12wt%, 14wt%, 16wt%, 18wt%, 20wt%, etc.).
As an example, the nickel-based tungsten carbide alloy powder includes, in mass percent, 60wt% Ni and 40wt% WC.
As an example, the tungsten carbide cobalt nanocomposite powder comprises 88wt% of WC and 12wt% of Co by mass percentage, and the tungsten carbide cobalt nanocomposite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nanocomposite powder is 50nm to 100nm (for example, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, etc.).
For example, the rotation speed of the polishing in step S2 is 80 to 200r/min, and the polishing time is 10 to 20 hours.
Specifically, the grinding speed can comprise values in any range of 80r/min, 100r/min, 130r/min, 150r/min, 170r/min, 200r/min and the like, and can be adjusted according to the actual condition; the grinding time can include any range of values such as 10h, 12h, 14h, 16h, 18h, 20h and the like, and can be adjusted according to actual conditions.
As an example, the pressure of the press mold in step S3 is 200 to 500MPa.
Specifically, the pressure for the press molding in step S3 may include any range of values such as 200Mpa, 300Mpa, 400Mpa, and 500Mpa, and may be adjusted according to the actual conditions.
As an example, the sintering in step S4 is specifically: heating to 1500-1600 ℃ under the vacuum degree of 5-20 pa, preserving heat for 2h, then filling argon to the vacuum degree of 5Mpa, and continuously preserving heat and pressure for 2h.
Specifically, the degree of vacuum may include values in any range such as 5pa, 8pa, 10pa, 12pa, 15pa, 18pa, 20pa, and the like, and may be adjusted according to the actual conditions, and the temperature for heating may include values in any range such as 1500 ℃, 1520 ℃, 1540 ℃, 1560 ℃, 1580 ℃, 1600 ℃, and the like, and may be adjusted according to the actual conditions.
As an example, the cooling in step S4 includes a first cooling, a second cooling and a final cooling, wherein the first cooling is cooling to 1000-1200 ℃ (such as 1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃, etc.), and keeping the temperature for 2h; the second cooling is to cool the mixture to 500 ℃ and keep the temperature for 2 hours; finally, the mixture is rapidly cooled to room temperature in water cooled to 0 to 5 ℃ (e.g., 0 ℃, 1 ℃, 2 ℃, 3 ℃, 4 ℃, 5 ℃).
In order to better understand the hard alloy material for the wear-resistant wearing part and the preparation method thereof in the present invention, the hard alloy material for the wear-resistant wearing part and the preparation method thereof in the present invention are described below with reference to specific examples, which are only a part of examples, but not all examples, unless otherwise specified, and the raw materials and equipment used in the examples are conventional in the art. It should be noted that these examples are merely illustrative and do not limit the present invention in any way.
Example 1
The embodiment provides a hard alloy material for a wear-resistant wearing part, which comprises, by mass, 10wt% of titanium carbide, 40wt% of nickel-based tungsten carbide alloy powder, 30wt% of tungsten carbide powder, 10wt% of aluminum titanium nitride powder and 10wt% of tungsten carbide cobalt nano composite powder, wherein the nickel-based tungsten carbide alloy powder comprises, by mass, 60wt% of Ni and 40wt% of WC; according to the mass percentage, the tungsten carbide cobalt nano composite powder comprises 88wt% of WC and 12wt% of Co; the tungsten carbide cobalt nano composite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 100nm.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which comprises the following steps:
s1, weighing titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder and aluminum titanium nitride powder according to the raw material ratio, uniformly mixing, adding the tungsten carbide cobalt nano composite powder according to the ratio, and uniformly mixing to obtain a material;
s2, adding the materials into a grinder, grinding for 15 hours at the rotating speed of 100r/min, and sieving to obtain 200-mesh particles to obtain mixed powder;
s3, putting the mixed powder into a mold, and performing compression molding under 200Mpa to obtain a material block;
s4, placing the material block under the vacuum degree of 5pa, heating to 1500 ℃, preserving heat for 2 hours, then filling argon to the vacuum degree of 5Mpa, and continuing preserving heat and pressure for 2 hours; then quickly cooling to 1000 ℃, and preserving heat for 2h; cooling to 500 ℃, and keeping the temperature for 2h; and finally, rapidly cooling the mixture to room temperature in water at the temperature of 0 ℃ to obtain the hard alloy material.
Performance testing
The hardness and the bending strength of the hard alloy material prepared in the embodiment are tested, the hardness test refers to a Rockwell hardness test of GB/T230.2 hard alloy, and the bending strength test refers to GB/T3851-1983.
The hardness of the cemented carbide material prepared in this example was 93.5HBR and the bending strength was 2389N/mm 2 。
Example 2
The embodiment provides a hard alloy material for a wear-resistant wearing part, and the hard alloy material includes, by mass, 1wt% of titanium carbide, 35wt% of nickel-based tungsten carbide alloy powder, 30wt% of tungsten carbide powder, 15wt% of aluminum titanium nitride powder, and 19wt% of tungsten carbide cobalt nano-composite powder, which are the same as those in embodiment 1, and are not described herein again.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is different from the preparation method in embodiment 1 in that: the raw materials in the step S1 are different in proportion; the grinding time in the step S2 is 18h; the pressure intensity of pressing in the step S3 is 300Mpa; in the step S4, heating to 1550 ℃ under the vacuum degree of 5 pa; other steps and methods are the same as those in embodiment 1, and are not described herein again.
The hardness and bending strength of the hard alloy material prepared in this embodiment were tested by the same method as in embodiment 1, and the details are not repeated herein.
The hardness of the hard alloy material prepared in the embodiment is 94.2HBR and the bending strength is 2438N/mm through testing 2 。
Example 3
The embodiment provides a hard alloy material for a wear-resistant wearing part, and the hard alloy material includes, by mass, 5wt% of titanium carbide, 30wt% of nickel-based tungsten carbide alloy powder, 25wt% of tungsten carbide powder, 20wt% of aluminum titanium nitride powder, and 20wt% of tungsten carbide cobalt nano-composite powder, which are the same as those in embodiment 1, and are not described herein again.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is different from the preparation method in embodiment 1 in that: the raw materials in the step S1 are different in proportion; in the step S2, the grinding time is 20h; the pressure intensity of the pressing in the step S3 is 500Mpa; in the step S4, the mixture is heated to 1600 ℃ under the vacuum degree of 5 pa; other steps and methods are the same as those in embodiment 1, and are not described herein again.
The hardness and bending strength of the hard alloy material prepared in this embodiment were tested by the same method as in embodiment 1, and the details are not repeated herein.
The hardness of the hard alloy material prepared in the embodiment is 94.8HBR and the bending strength is 2478N/mm through testing 2 。
Example 4
The present embodiment provides a hard alloy material for a wear-resistant wearing part, and the raw material ratio in the hard alloy material is the same as that in embodiment 1 according to mass percentage, and details are not repeated herein.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is different from the preparation method in embodiment 1 in that: in the step S2, the grinding time is 18h; the pressure intensity of the pressing in the step S3 is 300Mpa; in the step S4, the mixture is heated to 1550 ℃ under the vacuum degree of 5 pa; other steps and methods are the same as those in embodiment 1, and are not described herein again.
The hardness and bending strength of the cemented carbide material prepared in this example were tested by the same method as in example 1, and the details are not repeated herein.
The hardness of the hard alloy material prepared in the embodiment is 95.2HBR and the bending strength is 2498N/mm through tests 2 。
Example 5
The present embodiment provides a hard alloy material for a wear-resistant wearing part, and the raw material ratio in the hard alloy material is the same as that in embodiment 1 according to mass percentage, and details are not repeated herein.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is different from the preparation method in embodiment 1 in that: in the step S2, the grinding time is 20h; the pressure intensity of the pressing in the step S3 is 500Mpa; in the step S4, the mixture is heated to 1600 ℃ under the vacuum degree of 5 pa; other steps and methods are the same as those in embodiment 1, and are not described herein again. The hardness and bending strength of the hard alloy material prepared in this embodiment were tested by the same method as in embodiment 1, and the details are not repeated herein.
The hardness of the cemented carbide material prepared in this example was 95.5HBR and the bending strength was 2499N/mm 2 。
Example 6
The present embodiment provides a hard alloy material for a wear-resistant wearing part, and the raw material ratio in the hard alloy material is the same as that in embodiment 1 according to mass percentage, and details are not repeated herein.
The embodiment provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is different from the preparation method in embodiment 1 in that: in the step S4, the temperature is quickly cooled to 1200 ℃, and the temperature is kept for 2 hours; cooling to 500 ℃, and preserving heat for 2 hours; finally, rapidly cooling the mixture to room temperature in water at the temperature of 5 ℃ to obtain a hard alloy material; other steps and methods are the same as those in embodiment 1, and are not described herein again.
The hardness and bending strength of the cemented carbide material prepared in this example were tested by the same method as in example 1, and the details are not repeated herein.
The hardness of the cemented carbide material prepared in this example is 95.2HBR, and the bending strength is 2458N/mm 2 。
Comparative example 1
The comparison example provides a hard alloy material for a wear-resistant wearing part, and the hard alloy material comprises, by mass, 10wt% of titanium carbide, 40wt% of nickel-based tungsten carbide alloy powder, 30wt% of tungsten carbide powder, 15wt% of aluminum titanium nitride powder and 5wt% of tungsten carbide cobalt nano composite powder; the rest is the same as that in embodiment 1, and will not be described again.
The present comparative example provides a preparation method of a hard alloy material for a wear-resistant wearing part, which is the same as that in example 1 and is not repeated herein.
The hardness and bending strength of the cemented carbide material prepared in this comparative example were tested by the same method as in example 1, and the details thereof are not repeated herein.
As a result of the test, the hardness of the cemented carbide material prepared in this comparative example was 88.8HBR, and the bending strength was 1978N/mm 2 。
In conclusion, the hard alloy material disclosed by the invention is composed of titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder, aluminum titanium nitride powder and tungsten carbide cobalt nano composite powder, wherein the nickel-based tungsten carbide alloy powder and the tungsten carbide are used as main basic components and have the characteristics of wear resistance, high temperature resistance and high hardness, the titanium carbide has the characteristics of high hardness, corrosion resistance and good special stability, the aluminum titanium nitride powder plays the roles of corrosion resistance, high temperature resistance and oxidation resistance, and then the hard alloy material with the remarkably improved surface wear resistance can be obtained by adding the tungsten carbide cobalt nano composite powder and adjusting the proportion of the raw materials; the method is simple and easy to implement, can be used for mass production, and the finally prepared hard alloy material for the wear-resistant wearing part has stronger wear resistance and longer service life, can be more durable and wear-resistant in the use process of the wearing part, and increases the service life and the working efficiency of the workpiece. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A hard alloy material for wear-resistant wearing parts is characterized in that: according to the mass percentage, the hard alloy material comprises 0-10 wt% of titanium carbide, 20-40 wt% of nickel-based tungsten carbide alloy powder, 10-30 wt% of tungsten carbide powder, 0-20 wt% of aluminum titanium nitride powder and 10-20 wt% of tungsten carbide cobalt nano composite powder.
2. The cemented carbide material for wear parts according to claim 1, wherein: the nickel-based tungsten carbide alloy powder comprises 60wt% of Ni and 40wt% of WC according to mass percentage.
3. The cemented carbide material for wear parts according to claim 1, wherein: according to the mass percentage, the tungsten carbide cobalt nano composite powder comprises 88wt% of WC and 12wt% of Co; the tungsten carbide cobalt nano composite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 50 nm-100 nm.
4. A preparation method of a hard alloy material for a wear-resistant wearing part is characterized by comprising the following steps:
s1, uniformly mixing titanium carbide, nickel-based tungsten carbide alloy powder, tungsten carbide powder and aluminum titanium nitride powder according to a ratio, adding a certain amount of tungsten carbide cobalt nano composite powder, and uniformly mixing to obtain a material;
s2, adding the materials into a grinder for grinding, and sieving to obtain 200-mesh particles to obtain mixed powder;
s3, putting the mixed powder into a die for compression molding to obtain a material block;
and S4, sintering the material block, and then cooling to obtain the hard alloy material.
5. The method for preparing the hard alloy material for the wear-resistant wearing part according to claim 4, wherein in the hard alloy material, in the step S1, the titanium carbide accounts for 0-10 wt%, the nickel-based tungsten carbide alloy powder accounts for 20-40 wt%, the tungsten carbide powder accounts for 10-30 wt%, the aluminum titanium nitride powder accounts for 0-20 wt%, and the tungsten cobalt carbide nano composite powder accounts for 10-20 wt%.
6. The method for preparing the cemented carbide material for the wear-resistant wearing parts according to claim 5, characterized by comprising one or a combination of the following conditions:
the nickel-based tungsten carbide alloy powder in the step S1 comprises, by mass, 60wt% of Ni and 40wt% of WC;
according to the mass percentage, the tungsten carbide cobalt nano composite powder in the step S1 comprises 88wt% of WC and 12wt% of Co, the tungsten carbide cobalt nano composite powder is spherical, and the D50 particle size of the tungsten carbide cobalt nano composite powder is 50-100 nm.
7. The method for preparing the hard alloy material for the wear-resistant wearing part according to the claim 4, wherein the rotation speed of the grinding in the step S2 is 80-200 r/min, and the grinding time is 10-20 h.
8. The method for preparing the hard alloy material for the wear-resistant quick-wear part according to the claim 4, wherein the pressure of the press forming in the step S3 is 200-500 Mpa.
9. The method for preparing the hard alloy material for the wear-resistant wearing part according to claim 4, wherein the method comprises the following steps: the sintering in the step S4 specifically comprises the following steps: heating to 1500-1600 ℃ under the vacuum degree of 5-20 pa, preserving heat for 2h, then filling argon to the vacuum degree of 5Mpa, and continuously preserving heat and pressure for 2h.
10. The method for preparing the hard alloy material for the wear-resistant wearing part according to claim 4, wherein the method comprises the following steps: the cooling in the step S4 comprises primary cooling, secondary cooling and final cooling, wherein the primary cooling is cooling to 1000-1200 ℃, and heat preservation is carried out for 2 hours; the second cooling is to cool the mixture to 500 ℃ and preserve heat for 2 hours; and finally, rapidly cooling the mixture to room temperature in water with the temperature of 0-5 ℃.
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