Hard alloy cutter material and preparation method thereof

Abstract

The invention discloses a hard alloy cutter material and a preparation method thereof, and the hard alloy cutter material comprises the following raw materials in percentage: 70%-94% of tungsten carbide, 5%-29% of cobalt, 0.5%-1.5% of titanium, 0.5%-2% of chromium, 0.5%-2% of nickel, 0.5%-1% of niobium, 0.5%-2% of molybdenum, 0.5%-1% of tantalum and 0.1%-0.5% of silver. The titanium, chromium and nickel materials are added on the basis of the raw materials, sintering treatment, surface treatment and reinforced heat treatment are carried out in the preparation process, the hardness, wear resistance and corrosion resistance of the surface of the hard alloy cutter can be effectively improved, the stability of the material and the toughness of the hard alloy cutter are improved, the brittleness problem is reduced, and the service life of the hard alloy cutter is prolonged. And the risk of fracture damage in the working process of the hard alloy cutter is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cemented carbide tool technology, and in particular to a cemented carbide tool material and a preparation method thereof. Background Art

[0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. It has the characteristics of high hardness, relatively good strength and toughness, and certain excellent properties such as heat resistance and corrosion resistance. Due to the characteristics of cemented carbide, cemented carbide tools are often known as "industrial teeth" in the machine tool industry. Its products are mainly used to manufacture cutting tools and wear-resistant parts, and can be widely used in aerospace, automobile, energy, mold and other mechanical processing fields;

[0003] The cemented carbide tools processed in the prior art are relatively brittle and easily break during operation, especially when subjected to large impact or vibration forces. To solve the above problems, the present application proposes a cemented carbide tool material and a preparation method thereof. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a cemented carbide tool material and a preparation method thereof.

[0005] The present invention provides a cemented carbide tool material, which comprises the following raw material percentages: 70%-94% tungsten carbide, 5%-29% cobalt, 0.5%-1.5% titanium, 0.5%-2% chromium, 0.5%-2% nickel, 0.5%-1% niobium, 0.5%-2% molybdenum, 0.5%-1% tantalum, and 0.1%-0.5% silver.

[0006] Preferably, the following raw material percentages are included: tungsten carbide 70%, cobalt 25%, titanium 0.5%, chromium 0.5%, nickel 1%, niobium 0.5%, molybdenum 1.5%, tantalum 0.5%, and silver 0.5%.

[0007] Preferably, the following raw material percentages are included: 80% tungsten carbide, 12% cobalt, 1.5% titanium, 2% chromium, 2% nickel, 0.5% niobium, 0.9% molybdenum, 1% tantalum, and 0.1% silver.

[0008] Preferably, the following raw material percentages are included: 91% tungsten carbide, 5% cobalt, 0.5% titanium, 0.5% chromium, 0.5% nickel, 0.5% niobium, 1% molybdenum, 0.6% tantalum, and 0.4% silver.

[0009] Preferably, the addition of titanium, chromium and nickel is used to improve the toughness of cemented carbide tools and reduce their brittleness, niobium is used to improve the corrosion resistance of cemented carbide, molybdenum is used to enhance the hardness and wear resistance of cemented carbide, tantalum is used to improve the oxidation resistance and thermal stability of cemented carbide, and silver is used to improve the thermal conductivity of cemented carbide.

[0010] The present invention also proposes a method for preparing a cemented carbide tool material, comprising the following steps:

[0011] S1: preparing 70%-94% tungsten carbide, 5%-29% cobalt, 0.5%-1.5% titanium, 0.5%-2% chromium, 0.5%-2% nickel, 0.5%-1% niobium, 0.5%-2% molybdenum, 0.5%-1% tantalum and 0.1%-0.5% silver, respectively, putting them into a ball mill for crushing, pouring them into a 3000 mesh sieve for sieving after crushing, and obtaining powders of various raw materials;

[0012] S2: putting various raw material powders obtained in S1 into a stirring mixer at a rotation speed of 200-500 rpm and mixing for 25-30 minutes to obtain an alloy raw material mixture;

[0013] S3: placing the alloy raw material mixture in S2 into a mold for hot pressing for 5-10 minutes to obtain a blank of a desired shape;

[0014] S4: placing the green body formed in S3 into a high temperature sintering furnace at a temperature of 1300-1600°C for sintering for 5-15 hours, so that the powder particles diffuse and combine with each other to form a cemented carbide material;

[0015] S5: The cemented carbide material formed in S4 is subjected to precision machining by cutting and grinding processes to form a cemented carbide tool;

[0016] S6: The carbide tool made of S5 is oxidized and coated to improve the hardness, wear resistance and corrosion resistance of the carbide tool surface and reduce the brittleness problem;

[0017] S7: Strengthen the heat treatment of the cemented carbide tools treated in S6 to optimize the grain structure of the material, improve the stability and mechanical properties of the material, reduce internal stress, and improve toughness.

[0018] Preferably, in S3, the temperature of the mold is 1200-1600°C.

[0019] Preferably, in S4, the high-temperature sintering furnace needs to be preheated before sintering, the preheating time is 30-120 minutes, and the preheating temperature is 300-800°C. After sintering, cooling treatment is required, and cooling is performed by introducing circulating cooling gas to cool to 20-25°C.

[0020] Preferably, in S6, during the oxidation and coating processing, the oxidation treatment is performed first, and then the coating treatment is performed;

[0021] During oxidation treatment, the surface of the cemented carbide tool is first cleaned, and then a thermal oxidation method is used to generate an oxide layer on the surface of the cemented carbide tool. Finally, the micropores of the oxide layer are filled and sealed with phosphate to improve the corrosion resistance and oxidation resistance of the oxide layer.

[0022] During the coating treatment, titanium oxide (TiN) is selected as the coating material, and the physical vapor deposition (PVD) technology is used to evenly spray the titanium oxide (TiN) coating material on the surface of the cemented carbide tool. Finally, the coated cemented carbide tool is placed in a baking oven at a temperature of 150-250°C for baking and curing treatment to form a dense coating.

[0023] Preferably, in S7, the specific steps of strengthening the heat treatment are as follows:

[0024] S701: Place the carbide tool into the carburizing furnace and preheat it at 700-900℃ for 20-30min;

[0025] S702: Raise the temperature in the carburizing furnace to 900-1200°C, then introduce acetone vapor into the carburizing furnace as a carbon source, and the carbon atoms penetrate the surface of the cemented carbide tool at high temperature and diffuse into the inside of the matrix to form a carbon-rich surface layer, and heat for 1-4 hours;

[0026] S703: After the diffusion is completed, the cemented carbide tool is solidified by oil quenching to quickly solidify the surface structure of the cemented carbide tool;

[0027] S704: placing the cemented carbide tool after the solidification treatment in S703 into a low temperature furnace at 200-300°C for low temperature tempering to further release the residual stress and improve the toughness of the cemented carbide tool;

[0028] S705: The hard alloy tool treated in S704 is cleaned by high-temperature water to remove impurities on the surface, thereby obtaining a treated hard alloy tool.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention adds titanium, chromium and nickel materials to the raw materials, and performs sintering treatment, surface treatment and enhanced heat treatment in the preparation process, so as to effectively improve the hardness, wear resistance and corrosion resistance of the surface of the cemented carbide tool, improve the stability of the material and the toughness of the cemented carbide tool, reduce the brittleness problem, and reduce the risk of fracture and damage of the cemented carbide tool during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A flow chart of a method for preparing a cemented carbide tool material proposed by the present invention;

[0032] Figure 2 The present invention provides a curve chart comparing experimental data in a method for preparing cemented carbide tool materials. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with specific embodiments.

[0034] Embodiment 1

[0035] Reference Figure 1 , this embodiment proposes a cemented carbide tool material, including the following raw material percentages: 70% tungsten carbide, 25% cobalt, 0.5% titanium, 0.5% chromium, 1% nickel, 0.5% niobium, 1.5% molybdenum, 0.5% tantalum, and 0.5% silver, wherein the addition of titanium, chromium, and nickel is used to improve the toughness of the cemented carbide tool and reduce its brittleness, niobium is used to improve the corrosion resistance of the cemented carbide, molybdenum is used to enhance the hardness and wear resistance of the cemented carbide, tantalum is used to improve the oxidation resistance and thermal stability of the cemented carbide, and silver is used to improve the thermal conductivity of the cemented carbide;

[0036] The preparation method comprises the following steps:

[0037] S1: Prepare 70% tungsten carbide, 25% cobalt, 0.5% titanium, 0.5% chromium, 1% nickel, 0.5% niobium, 1.5% molybdenum, 0.5% tantalum and 0.5% silver, respectively, put them into a ball mill for crushing, pour them into a 3000 mesh sieve for sieving, and obtain powders of various raw materials;

[0038] S2: various raw material powders obtained in S1 are placed in a stirring mixer at a rotation speed of 200 rpm and mixed for 25 minutes to obtain an alloy raw material mixture;

[0039] S3: placing the alloy raw material mixture in S2 into a mold for hot pressing for 5 minutes to obtain a blank of a desired shape, wherein the temperature of the mold is 1200°C;

[0040] S4: placing the green body formed in S3 into a high-temperature sintering furnace at a temperature of 1300° C. for sintering for 5 hours, so that the powder particles diffuse and combine with each other to form a cemented carbide material;

[0041] Before sintering, the high temperature sintering furnace needs to be preheated for 30 minutes at a temperature of 300°C. After sintering, it needs to be cooled by introducing circulating cooling gas to cool to 20°C.

[0042] S5: The cemented carbide material formed in S4 is subjected to precision machining by cutting and grinding processes to form a cemented carbide tool;

[0043] S6: The carbide tool made of S5 is oxidized and coated to improve the hardness, wear resistance and corrosion resistance of the carbide tool surface and reduce the brittleness problem;

[0044] In the oxidation and coating processing, the oxidation treatment is first performed, and then the coating treatment is performed;

[0045] During oxidation treatment, the surface of the cemented carbide tool is first cleaned, and then a thermal oxidation method is used to generate an oxide layer on the surface of the cemented carbide tool. Finally, the micropores of the oxide layer are filled and sealed with phosphate to improve the corrosion resistance and oxidation resistance of the oxide layer.

[0046] During the coating treatment, titanium oxide (TiN) is selected as the coating material, and the titanium oxide (TiN) coating material is evenly sprayed on the surface of the cemented carbide tool using physical vapor deposition (PVD) technology. Finally, the coated cemented carbide tool is placed in a baking oven at a temperature of 150°C for baking and curing to form a dense coating.

[0047] S7: Strengthen the heat treatment of the cemented carbide tool after treatment in S6 to optimize the grain structure of the material, improve the stability and mechanical properties of the material, reduce internal stress, and improve toughness;

[0048] The specific steps of strengthening heat treatment are as follows:

[0049] S701: Put the carbide tool into the carburizing furnace and preheat it at 700°C for 20 minutes;

[0050] S702: the temperature in the carburizing furnace is raised to 900°C, and then acetone vapor is introduced into the carburizing furnace as a carbon source. Carbon atoms penetrate the surface of the cemented carbide tool at high temperature and diffuse into the inside of the matrix to form a carbon-rich surface layer. The heating is performed for 1 hour.

[0051] S703: After the diffusion is completed, the cemented carbide tool is solidified by oil quenching to quickly solidify the surface structure of the cemented carbide tool;

[0052] S704: placing the cemented carbide tool after the solidification treatment in S703 into a low-temperature furnace at 200°C for low-temperature tempering to further release the residual stress and improve the toughness of the cemented carbide tool;

[0053] S705: The hard alloy tool treated in S704 is cleaned by high-temperature water to remove impurities on the surface, thereby obtaining a treated hard alloy tool.

[0054] Embodiment 2

[0055] Reference Figure 1 , this embodiment proposes a cemented carbide tool material, including the following raw material percentages: 80% tungsten carbide, 12% cobalt, 1.5% titanium, 2% chromium, 2% nickel, 0.5% niobium, 0.9% molybdenum, 1% tantalum, and 0.1% silver, wherein the addition of titanium, chromium, and nickel is used to improve the toughness of the cemented carbide tool and reduce its brittleness, niobium is used to improve the corrosion resistance of the cemented carbide, molybdenum is used to enhance the hardness and wear resistance of the cemented carbide, tantalum is used to improve the oxidation resistance and thermal stability of the cemented carbide, and silver is used to improve the thermal conductivity of the cemented carbide;

[0056] The preparation method comprises the following steps:

[0057] S1: 80% tungsten carbide, 12% cobalt, 1.5% titanium, 2% chromium, 2% nickel, 0.5% niobium, 0.9% molybdenum, 1% tantalum and 0.1% silver are prepared and respectively put into a ball mill for crushing, and then poured into a 3000 mesh sieve for sieving to obtain powders of various raw materials;

[0058] S2: various raw material powders obtained in S1 are placed in a stirring mixer at a rotation speed of 300 rpm and mixed for 28 minutes to obtain an alloy raw material mixture;

[0059] S3: placing the alloy raw material mixture in S2 into a mold for hot pressing for 8 minutes to obtain a blank of a desired shape, wherein the temperature of the mold is 1400°C;

[0060] S4: placing the green body formed in S3 into a high-temperature sintering furnace at a temperature of 1500° C. for sintering for 10 hours, so that the powder particles diffuse and combine with each other to form a cemented carbide material;

[0061] Before sintering, the high temperature sintering furnace needs to be preheated for 90 minutes at a temperature of 500°C. After sintering, it needs to be cooled by introducing circulating cooling gas to cool to 23°C.

[0062] S5: The cemented carbide material formed in S4 is subjected to precision machining by cutting and grinding processes to form a cemented carbide tool;

[0063] S6: The carbide tool made of S5 is oxidized and coated to improve the hardness, wear resistance and corrosion resistance of the carbide tool surface and reduce the brittleness problem;

[0064] In the oxidation and coating processing, the oxidation treatment is first performed, and then the coating treatment is performed;

[0065] During oxidation treatment, the surface of the cemented carbide tool is first cleaned, and then a thermal oxidation method is used to generate an oxide layer on the surface of the cemented carbide tool. Finally, the micropores of the oxide layer are filled and sealed with phosphate to improve the corrosion resistance and oxidation resistance of the oxide layer.

[0066] During the coating treatment, titanium oxide (TiN) is selected as the coating material, and the titanium oxide (TiN) coating material is evenly sprayed on the surface of the cemented carbide tool using physical vapor deposition (PVD) technology. Finally, the coated cemented carbide tool is placed in a baking oven at a temperature of 200°C for baking and curing to form a dense coating.

[0067] S7: Strengthen the heat treatment of the cemented carbide tool after treatment in S6 to optimize the grain structure of the material, improve the stability and mechanical properties of the material, reduce internal stress, and improve toughness;

[0068] The specific steps of strengthening heat treatment are as follows:

[0069] S701: Put the carbide tool into the carburizing furnace and preheat it at 800°C for 25 minutes;

[0070] S702: the temperature in the carburizing furnace is raised to 1000°C, and then acetone vapor is introduced into the carburizing furnace as a carbon source. Carbon atoms penetrate the surface of the cemented carbide tool at high temperature and diffuse into the inside of the matrix to form a carbon-rich surface layer. The heating is performed for 3 hours.

[0071] S703: After the diffusion is completed, the cemented carbide tool is solidified by oil quenching to quickly solidify the surface structure of the cemented carbide tool;

[0072] S704: placing the cemented carbide tool after the solidification treatment in S703 into a low-temperature furnace at 250°C for low-temperature tempering to further release the residual stress and improve the toughness of the cemented carbide tool;

[0073] S705: The hard alloy tool treated in S704 is cleaned by high-temperature water to remove impurities on the surface, thereby obtaining a treated hard alloy tool.

[0074] Embodiment 3

[0075] Reference Figure 1 , this embodiment proposes a cemented carbide tool material, including the following raw material percentages: including the following raw material percentages: 91% tungsten carbide, 5% cobalt, 0.5% titanium, 0.5% chromium, 0.5% nickel, 0.5% niobium, 1% molybdenum, 0.6% tantalum, and 0.4% silver, wherein the addition of titanium, chromium, and nickel is used to improve the toughness of the cemented carbide tool and reduce its brittleness, niobium is used to improve the corrosion resistance of the cemented carbide, molybdenum is used to enhance the hardness and wear resistance of the cemented carbide, tantalum is used to improve the oxidation resistance and thermal stability of the cemented carbide, and silver is used to improve the thermal conductivity of the cemented carbide;

[0076] The preparation method comprises the following steps:

[0077] S1: 91% tungsten carbide, 5% cobalt, 0.5% titanium, 0.5% chromium, 0.5% nickel, 0.5% niobium, 1% molybdenum, 0.6% tantalum and 0.4% silver are prepared and respectively put into a ball mill for crushing, and then poured into a 3000 mesh sieve for sieving to obtain powders of various raw materials;

[0078] S2: various raw material powders obtained in S1 are placed in a stirring mixer at a rotation speed of 500 rpm and mixed for 30 minutes to obtain an alloy raw material mixture;

[0079] S3: placing the alloy raw material mixture in S2 into a mold for hot pressing for 10 minutes to obtain a blank of a desired shape, wherein the temperature of the mold is 1600°C;

[0080] S4: placing the green body formed in S3 into a high-temperature sintering furnace at a temperature of 1600° C. for sintering for 15 hours, so that the powder particles diffuse and combine with each other to form a cemented carbide material;

[0081] Before sintering, the high temperature sintering furnace needs to be preheated for 120 minutes at a temperature of 800°C. After sintering, it needs to be cooled by introducing circulating cooling gas to cool to 25°C.

[0082] S5: The cemented carbide material formed in S4 is subjected to precision machining by cutting and grinding processes to form a cemented carbide tool;

[0083] S6: The carbide tool made of S5 is oxidized and coated to improve the hardness, wear resistance and corrosion resistance of the carbide tool surface and reduce the brittleness problem;

[0084] In the oxidation and coating processing, the oxidation treatment is first performed, and then the coating treatment is performed;

[0085] During oxidation treatment, the surface of the cemented carbide tool is first cleaned, and then a thermal oxidation method is used to generate an oxide layer on the surface of the cemented carbide tool. Finally, the micropores of the oxide layer are filled and sealed with phosphate to improve the corrosion resistance and oxidation resistance of the oxide layer.

[0086] During the coating treatment, titanium oxide (TiN) is selected as the coating material, and the titanium oxide (TiN) coating material is evenly sprayed on the surface of the cemented carbide tool using physical vapor deposition (PVD) technology. Finally, the coated cemented carbide tool is placed in a baking oven at a temperature of 250°C for baking and curing to form a dense coating.

[0087] S7: Strengthen the heat treatment of the cemented carbide tool after treatment in S6 to optimize the grain structure of the material, improve the stability and mechanical properties of the material, reduce internal stress, and improve toughness;

[0088] The specific steps of strengthening heat treatment are as follows:

[0089] S701: Put the carbide tool into the carburizing furnace and preheat it at 900°C for 30 minutes;

[0090] S702: the temperature in the carburizing furnace is raised to 1200°C, and then acetone vapor is introduced into the carburizing furnace as a carbon source. Carbon atoms penetrate the surface of the cemented carbide tool at high temperature and diffuse into the inside of the matrix to form a carbon-rich surface layer. The heating is performed for 4 hours.

[0091] S703: After the diffusion is completed, the cemented carbide tool is solidified by oil quenching to quickly solidify the surface structure of the cemented carbide tool;

[0092] S704: placing the cemented carbide tool after the solidification treatment in S703 into a low-temperature furnace at 300°C for low-temperature tempering to further release the residual stress and improve the toughness of the cemented carbide tool;

[0093] S705: The hard alloy tool treated in S704 is cleaned by high-temperature water to remove impurities on the surface, thereby obtaining a treated hard alloy tool.

[0094] The experimental data of the cemented carbide tool materials obtained in Examples 1 to 3 are compared with conventional cemented carbide tool materials as shown in the following table:

[0095]

[0096] It can be seen from the above table that the toughness, hardness and wear resistance of the cemented carbide tool material prepared by the present invention are significantly improved, the brittleness is significantly reduced, and the second embodiment is the best embodiment.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cemented carbide tool material, characterized in that: It includes the following raw material percentages: tungsten carbide 70%-94%, cobalt 5%-29%, titanium 0.5%-1.5%, chromium 0.5%-2%, nickel 0.5%-2%, niobium 0.5%-1%, molybdenum 0.5%-2%, tantalum 0.5%-1%, and silver 0.1%-0.5%.

2. A cemented carbide tool material according to claim 1, characterized in that: It includes the following raw material percentages: tungsten carbide 70%, cobalt 25%, titanium 0.5%, chromium 0.5%, nickel 1%, niobium 0.5%, molybdenum 1.5%, tantalum 0.5%, and silver 0.5%.

3. A cemented carbide tool material according to claim 1, characterized in that: It includes the following raw material percentages: tungsten carbide 80%, cobalt 12%, titanium 1.5%, chromium 2%, nickel 2%, niobium 0.5%, molybdenum 0.9%, tantalum 1%, and silver 0.1%.

4. The cemented carbide tool material according to claim 1, characterized in that: It includes the following raw material percentages: tungsten carbide 91%, cobalt 5%, titanium 0.5%, chromium 0.5%, nickel 0.5%, niobium 0.5%, molybdenum 1%, tantalum 0.6%, and silver 0.4%.

5. The cemented carbide tool material according to claim 1, characterized in that: The addition of titanium, chromium and nickel is used to improve the toughness of cemented carbide tools and reduce their brittleness, niobium is used to improve the corrosion resistance of cemented carbide, molybdenum is used to enhance the hardness and wear resistance of cemented carbide, tantalum is used to improve the oxidation resistance and thermal stability of cemented carbide, and silver is used to improve the thermal conductivity of cemented carbide.

6. A method for preparing a cemented carbide tool material, characterized in that: The following steps are involved: S1: preparing 70%-94% tungsten carbide, 5%-29% cobalt, 0.5%-1.5% titanium, 0.5%-2% chromium, 0.5%-2% nickel, 0.5%-1% niobium, 0.5%-2% molybdenum, 0.5%-1% tantalum and 0.1%-0.5% silver, respectively, putting them into a ball mill for crushing, pouring them into a 3000 mesh sieve for sieving after crushing, and obtaining powders of various raw materials; S2: putting various raw material powders obtained in S1 into a stirring mixer at a rotation speed of 200-500 rpm and mixing for 25-30 minutes to obtain an alloy raw material mixture; S3: placing the alloy raw material mixture in S2 into a mold for hot pressing for 5-10 minutes to obtain a blank of a desired shape; S4: placing the green body formed in S3 into a high temperature sintering furnace at a temperature of 1300-1600°C for sintering for 5-15 hours, so that the powder particles diffuse and combine with each other to form a cemented carbide material; S5: The cemented carbide material formed in S4 is subjected to precision machining by cutting and grinding processes to form a cemented carbide tool; S6: oxidation and coating of the carbide tool made in S5; S7: Strengthen the heat treatment of the cemented carbide tool treated in S6.

7. The method for preparing a cemented carbide tool material according to claim 6, characterized in that: In S3, the temperature of the mold is 1200-1600°C.

8. The method for preparing a cemented carbide tool material according to claim 6, characterized in that: In S4, the high temperature sintering furnace needs to be preheated before sintering. The preheating time is 30-120 minutes and the preheating temperature is 300-800°C. After sintering, cooling is required by introducing circulating cooling gas to cool to 20-25°C.

9. The method for preparing a cemented carbide tool material according to claim 6, characterized in that: In S6, during the oxidation and coating processing, the oxidation treatment is first performed, and then the coating treatment is performed; During oxidation treatment, the surface of the cemented carbide tool is first cleaned, and then a thermal oxidation method is used to generate an oxide layer on the surface of the cemented carbide tool. Finally, the micropores of the oxide layer are filled and sealed with phosphate to improve the corrosion resistance and oxidation resistance of the oxide layer. During the coating treatment, titanium oxide is selected as the coating material, and the titanium oxide coating material is evenly sprayed on the surface of the cemented carbide tool using physical vapor deposition technology. Finally, the coated cemented carbide tool is placed in a baking oven at a temperature of 150-250°C for baking and curing treatment to form a dense coating.

10. The method for preparing a cemented carbide tool material according to claim 6, characterized in that: In S7, the specific steps of strengthening the heat treatment are as follows: S701: Place the carbide tool into the carburizing furnace and preheat it at 700-900℃ for 20-30min; S702: Raise the temperature in the carburizing furnace to 900-1200°C, then introduce acetone vapor into the carburizing furnace as a carbon source, and the carbon atoms penetrate the surface of the cemented carbide tool at high temperature and diffuse into the inside of the matrix to form a carbon-rich surface layer, and heat for 1-4 hours; S703: After the diffusion is completed, the cemented carbide tool is solidified by oil quenching to quickly solidify the surface structure of the cemented carbide tool; S704: placing the cemented carbide tool after the solidification treatment in S703 into a low temperature furnace at 200-300°C for low temperature tempering to further release the residual stress and improve the toughness of the cemented carbide tool; S705: The hard alloy tool treated in S704 is cleaned by high-temperature water to remove impurities on the surface, thereby obtaining a treated hard alloy tool.

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