A nanometer cemented carbide numerical control cutter material and a preparation method thereof

Abstract

The application relates to the technical field of numerical control cutter materials, and particularly discloses a nano hard alloy numerical control cutter material and a preparation method thereof, which comprises the following raw materials in parts by weight: 45-50 parts of tungsten carbide powder with a particle size of 10 nm, 15-20 parts of cobalt powder, 5-7 parts of yttrium-modified nano boron nitride agent and 6-10 parts of ball milling adjusting agent. The nano hard alloy numerical control cutter material adopts the tungsten carbide powder, the cobalt powder, the yttrium-modified nano boron nitride agent and the ball milling adjusting agent, the yttrium-modified nano boron nitride agent and the ball milling adjusting agent are mutually coordinated, the cutter material obtained through mutual coordination and mutual assistance has excellent wear resistance, fracture toughness and stain resistance, the wear resistance, the fracture toughness and the stain resistance of the product are coordinately improved, and the high and low temperature stability of the product is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of CNC tool materials technology, specifically to a nano-hard alloy CNC tool material and its preparation method. Background Technology

[0002] CNC cutting tools are tools used for cutting processes in mechanical manufacturing, also known as cutting tools. In a broad sense, cutting tools include cutting tools and molds; meanwhile, "CNC molds" include not only cutting inserts but also accessories such as tool holders and tool shanks.

[0003] The existing nano-alloy materials used in CNC cutting tools have poor wear resistance. In order to improve the wear resistance of the products, the fracture toughness performance is easily reduced, making it difficult to achieve a coordinated improvement in wear resistance and fracture toughness. In addition, the products have poor high and low temperature stability, which further limits the efficiency of the products. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a nano-hard alloy CNC cutting tool material and its preparation method, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a nano-carbide CNC cutting tool material, comprising the following parts by weight of raw materials:

[0007] The mixture consists of 45-50 parts of tungsten carbide powder with a particle size of 10 nm, 15-20 parts of cobalt powder, 5-7 parts of yttrium-modified nano boron nitride agent, and 6-10 parts of ball milling modifier.

[0008] Preferably, the nano-carbide CNC cutting tool material comprises the following parts by weight of raw materials:

[0009] The mixture consists of 47.5 parts of tungsten carbide powder with a particle size of 10 nm, 17.5 parts of cobalt powder, 6 parts of yttrium-modified nano boron nitride agent, and 8 parts of ball milling modifier.

[0010] Preferably, the preparation method of the yttrium-modified nano boron nitride agent is as follows:

[0011] S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles.

[0012] The sheet-like boron nitride nanoparticles are first heat-treated at 210-230℃ for 5-10 minutes, then heated to 350-370℃ at a rate of 1-3℃ / min and held for 5 minutes, and finally cooled to 55℃ at a rate of 2-5℃ / min and held for later use.

[0013] S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride.

[0014] Add 3-5 parts of a 10% sodium dodecylbenzenesulfonate solution to 4-7 parts of a 5% lanthanum chloride solution, then add 2-4 parts of nano-silica sol and mix thoroughly to obtain a shaking solution;

[0015] S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:3. The ball milling speed was 1000-1500 r / min, and the milling time was 1-2 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium-modified boron nitride nanoparticles.

[0016] Preferably, the sheet-like boron nitride nanoparticles have a sheet thickness of 2–3 nm; the oscillation power of the oscillation modification treatment is 350–400 W, and the oscillation time is 20–25 min.

[0017] Preferably, the yttrium modifier is prepared by:

[0018] Add 2-4 parts of urea and 1-3 parts of nano-titanium dioxide to 5-10 parts of sodium alginate solution, then add 1-2 parts of silane coupling agent and 0.5-0.7 parts of zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution;

[0019] Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 10-15 minutes at an irradiation power of 300W. After irradiation, 3-6 parts of the irradiated yttrium oxide agent were added to 6-10 parts of the conditioning and modifying liquid and stirred to adjust the mixture. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent.

[0020] Preferably, the stirring temperature for the stirring and conditioning process is 48–52°C, the stirring speed is 500–700 r / min, and the stirring time is 1–2 h.

[0021] Preferably, the sodium alginate solution has a mass fraction of 10-15%; the silane coupling agent is silane coupling agent KH560.

[0022] Preferably, the method for preparing the ball milling conditioner is as follows:

[0023] S101: Place pyrophyllite in a sufficient amount of potassium permanganate solution with a concentration of 1-2 mol / L and react for 3-4 hours at a reaction temperature of 65-70℃, then wash with water and dry.

[0024] S102: Mix 4-7 parts of dried pyrophyllite, 2-5 parts of chitosan solution, 1-3 parts of phosphate buffer solution and 1-3 parts of sodium dodecyl sulfate thoroughly to obtain a ball milling conditioner.

[0025] Preferably, the chitosan solution has a mass fraction of 4-7%; and the phosphate buffer solution has a pH of 5.0.

[0026] This invention also provides a method for preparing nano-carbide CNC cutting tool material, comprising the following steps:

[0027] Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry.

[0028] Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1400-1420°C for 45-50 min, followed by sintering at 1220-1250°C for 70-80 min. After sintering, the nano-hard alloy CNC tool material of the present invention is obtained.

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

[0030] This invention relates to a nano-hard alloy CNC cutting tool material using tungsten carbide powder, cobalt powder, yttrium-modified nano-boron nitride agent, and a grinding modifier. Through the synergistic effect of the yttrium-modified nano-boron nitride agent and the grinding modifier, the resulting tool material exhibits excellent wear resistance, fracture toughness, and anti-fouling properties. The product achieves a coordinated improvement in wear resistance, fracture toughness, and anti-fouling properties, while also demonstrating significant high and low temperature stability. The yttrium-modified nano-boron nitride agent involves heat-treating sheet-like nano-boron nitride at 210–230°C for 5–10 minutes, then heating at a rate of 1–3°C / min to 350–370°C, holding at that temperature for 5 minutes, and finally cooling at a rate of 2–5°C / min to 55°C. This heat-modification treatment optimizes the activity and flexibility of the sheet-like nano-boron nitride. Furthermore, an oscillating fluid prepared from a mixture of sodium dodecylbenzenesulfonate solution, lanthanum chloride solution, and nano-silica sol is used to further improve the oscillation of the sheet-like nano-boron nitride, optimizing its properties. Boron nitride is improved through synergistic effects in the oscillating fluid, resulting in better synergistic effects with the yttrium modifier. The yttrium modifier uses yttrium oxide powder irradiated in a proton irradiation chamber to optimize its activity. The yttrium oxide powder is then modified using a modifying fluid prepared from urea, nano-titanium dioxide, sodium alginate solution, silane coupling agent, and zirconium dioxide. The synergistic effects of the raw materials in the modifying fluid, particularly nano-titanium dioxide and zirconium dioxide, along with sodium alginate solution, enhance the performance of the flake-shaped nano-boron nitride in the product system, further optimizing the product's wear resistance, fracture toughness, and antifouling properties, while also improving its high and low temperature stability. The ball milling modifier uses pyrophyllite treated with potassium permanganate solution to optimize its activity. It is then synergistically combined with chitosan solution, phosphate buffer solution, and sodium dodecyl sulfate. The use of pyrophyllite to harmonize the raw material additives in the ball milling modifier further enhances the performance of the product system, thereby improving the overall product performance. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The nano-hard alloy CNC tool material of this embodiment includes the following raw materials in parts by weight:

[0033] The mixture consists of 45-50 parts of tungsten carbide powder with a particle size of 10 nm, 15-20 parts of cobalt powder, 5-7 parts of yttrium-modified nano boron nitride agent, and 6-10 parts of ball milling modifier.

[0034] The nano-carbide CNC cutting tool material in this embodiment includes the following parts by weight of raw materials:

[0035] The mixture consists of 47.5 parts of tungsten carbide powder with a particle size of 10 nm, 17.5 parts of cobalt powder, 6 parts of yttrium-modified nano boron nitride agent, and 8 parts of ball milling modifier.

[0036] The preparation method of the yttrium-modified nano boron nitride agent in this embodiment is as follows:

[0037] S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles.

[0038] The sheet-like boron nitride nanoparticles are first heat-treated at 210-230℃ for 5-10 minutes, then heated to 350-370℃ at a rate of 1-3℃ / min and held for 5 minutes, and finally cooled to 55℃ at a rate of 2-5℃ / min and held for later use.

[0039] S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride.

[0040] Add 3-5 parts of a 10% sodium dodecylbenzenesulfonate solution to 4-7 parts of a 5% lanthanum chloride solution, then add 2-4 parts of nano-silica sol and mix thoroughly to obtain a shaking solution;

[0041] S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:3. The ball milling speed was 1000-1500 r / min, and the milling time was 1-2 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium-modified boron nitride nanoparticles.

[0042] In this embodiment, the sheet-like boron nitride nanoparticles have a sheet thickness of 2–3 nm; the oscillation power of the oscillation modification treatment is 350–400 W, and the oscillation time is 20–25 min.

[0043] The preparation method of the yttrium modifier in this embodiment is as follows:

[0044] Add 2-4 parts of urea and 1-3 parts of nano-titanium dioxide to 5-10 parts of sodium alginate solution, then add 1-2 parts of silane coupling agent and 0.5-0.7 parts of zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution;

[0045] Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 10-15 minutes at an irradiation power of 300W. After irradiation, 3-6 parts of the irradiated yttrium oxide agent were added to 6-10 parts of the conditioning and modifying liquid and stirred to adjust the mixture. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent.

[0046] In this embodiment, the stirring temperature for the stirring adjustment process is 48–52°C, the stirring speed is 500–700 r / min, and the stirring time is 1–2 h.

[0047] In this embodiment, the sodium alginate solution has a mass fraction of 10-15%; the silane coupling agent is silane coupling agent KH560.

[0048] The preparation method of the ball milling conditioner in this embodiment is as follows:

[0049] S101: Place pyrophyllite in a sufficient amount of potassium permanganate solution with a concentration of 1-2 mol / L and react for 3-4 hours at a reaction temperature of 65-70℃, then wash with water and dry.

[0050] S102: Mix 4-7 parts of dried pyrophyllite, 2-5 parts of chitosan solution, 1-3 parts of phosphate buffer solution and 1-3 parts of sodium dodecyl sulfate thoroughly to obtain a ball milling conditioner.

[0051] In this embodiment, the chitosan solution has a mass fraction of 4-7%; the pH value of the phosphate buffer solution is 5.0.

[0052] This embodiment describes a method for preparing a nano-hard alloy CNC cutting tool material, comprising the following steps:

[0053] Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry.

[0054] Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1400-1420°C for 45-50 min, followed by sintering at 1220-1250°C for 70-80 min. After sintering, the nano-hard alloy CNC tool material of the present invention is obtained.

[0055] Example 1.

[0056] The nano-hard alloy CNC tool material of this embodiment includes the following raw materials in parts by weight:

[0057] 45 parts of tungsten carbide powder with a particle size of 10 nm, 15 parts of cobalt powder, 5 parts of yttrium-modified nano boron nitride agent, and 6 parts of ball milling modifier.

[0058] The preparation method of the yttrium-modified nano boron nitride agent in this embodiment is as follows:

[0059] S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles.

[0060] The sheet-like boron nitride nanoparticles were first heat-treated at 210℃ for 5 min, then heated to 350℃ at a rate of 1℃ / min and held for 5 min, and finally cooled to 55℃ at a rate of 2℃ / min and held for later use.

[0061] S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride.

[0062] Add 3 parts of 10% sodium dodecylbenzenesulfonate solution to 4 parts of 5% lanthanum chloride solution, then add 2 parts of nano silica sol, mix thoroughly to obtain a shaking solution;

[0063] S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:3. The ball milling speed was 1000 r / min, and the milling time was 1 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium-modified boron nitride nanoparticles.

[0064] In this embodiment, the sheet-like boron nitride nanosheets have a sheet thickness of 2 nm; the oscillation power of the oscillation modification treatment is 350 W, and the oscillation time is 20 min.

[0065] The preparation method of the yttrium modifier in this embodiment is as follows:

[0066] Add 2 parts urea and 1 part nano titanium dioxide to 5 parts sodium alginate solution, then add 1 part silane coupling agent and 0.5 parts zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution;

[0067] Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 10 minutes at an irradiation power of 300W. After irradiation, 3 parts of the irradiated yttrium oxide agent were added to 6 parts of the conditioning and modifying liquid and stirred for conditioning. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent.

[0068] In this embodiment, the stirring temperature for the stirring adjustment process is 48°C, the stirring speed is 500 r / min, and the stirring time is 1 h.

[0069] In this embodiment, the sodium alginate solution has a mass fraction of 10%; the silane coupling agent is silane coupling agent KH560.

[0070] The preparation method of the ball milling conditioner in this embodiment is as follows:

[0071] S101: Pyrophyllite was placed in a sufficient amount of 1 mol / L potassium permanganate solution and reacted for 3 h at a reaction temperature of 65 °C, followed by washing with water and drying.

[0072] S102: Mix 4 parts of dried pyrophyllite, 2 parts of chitosan solution, 1 part of phosphate buffer solution and 1 part of sodium dodecyl sulfate thoroughly to obtain a ball milling conditioner.

[0073] In this embodiment, the chitosan solution has a mass fraction of 4%; the pH value of the phosphate buffer solution is 5.0.

[0074] This embodiment describes a method for preparing a nano-hard alloy CNC cutting tool material, comprising the following steps:

[0075] Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry.

[0076] Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1400°C for 45 min, followed by sintering at 1220°C for 70 min. After sintering, the nano-hard alloy CNC tool material of the present invention is obtained.

[0077] Example 2.

[0078] The nano-hard alloy CNC tool material of this embodiment includes the following raw materials in parts by weight:

[0079] 50 parts of tungsten carbide powder with a particle size of 10 nm, 20 parts of cobalt powder, 7 parts of yttrium-modified nano boron nitride agent, and 10 parts of ball milling modifier.

[0080] The preparation method of the yttrium-modified nano boron nitride agent in this embodiment is as follows:

[0081] S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles.

[0082] The sheet-like boron nitride nanoparticles were first heat-treated at 230℃ for 10 min, then heated to 370℃ at a rate of 3℃ / min and held for 5 min, and finally cooled to 55℃ at a rate of 5℃ / min and held for later use.

[0083] S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride.

[0084] Five parts of a 10% sodium dodecylbenzenesulfonate solution were added to seven parts of a 5% lanthanum chloride solution, followed by four parts of nano-silica sol. The mixture was thoroughly mixed to obtain a shaking solution.

[0085] S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:3. The ball milling speed was 1500 r / min, and the milling time was 2 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium-modified boron nitride nanoparticles.

[0086] In this embodiment, the sheet-like boron nitride nanoparticles have a sheet thickness of 3 nm; the oscillation power of the oscillation modification treatment is 400 W, and the oscillation time is 25 min.

[0087] The preparation method of the yttrium modifier in this embodiment is as follows:

[0088] Add 4 parts urea and 3 parts nano titanium dioxide to 10 parts sodium alginate solution, then add 2 parts silane coupling agent and 0.7 parts zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution;

[0089] Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 15 minutes at an irradiation power of 300W. After irradiation, 6 parts of the irradiated yttrium oxide agent were added to 10 parts of the conditioning and modifying liquid and stirred for conditioning. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent.

[0090] In this embodiment, the stirring temperature for the stirring adjustment process is 52°C, the stirring speed is 700 r / min, and the stirring time is 2 h.

[0091] In this embodiment, the sodium alginate solution has a mass fraction of 15%; the silane coupling agent is silane coupling agent KH560.

[0092] The preparation method of the ball milling conditioner in this embodiment is as follows:

[0093] S101: Pyrophyllite was placed in a sufficient amount of 2 mol / L potassium permanganate solution and reacted for 4 h at a reaction temperature of 70 °C, followed by washing with water and drying.

[0094] S102: 7 parts of dried pyrophyllite, 5 parts of chitosan solution, 3 parts of phosphate buffer solution and 3 parts of sodium dodecyl sulfate are thoroughly mixed to obtain a ball milling conditioner.

[0095] In this embodiment, the chitosan solution has a mass fraction of 7%; the pH value of the phosphate buffer solution is 5.0.

[0096] This embodiment describes a method for preparing a nano-hard alloy CNC cutting tool material, comprising the following steps:

[0097] Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry.

[0098] Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1420°C for 50 min, followed by sintering at 1250°C for 80 min. After sintering, the nano-hard alloy CNC tool material of the present invention is obtained.

[0099] Example 3.

[0100] The nano-hard alloy CNC tool material of this embodiment includes the following raw materials in parts by weight:

[0101] The mixture consists of 47.5 parts of tungsten carbide powder with a particle size of 10 nm, 17.5 parts of cobalt powder, 6 parts of yttrium-modified nano boron nitride agent, and 8 parts of ball milling modifier.

[0102] The preparation method of the yttrium-modified nano boron nitride agent in this embodiment is as follows:

[0103] S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles.

[0104] The sheet-like boron nitride nanoparticles were first heat-treated at 220℃ for 7.5 min, then heated to 360℃ at a rate of 2℃ / min and held for 5 min, and finally cooled to 55℃ at a rate of 3.5℃ / min and held for later use.

[0105] S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride.

[0106] Four parts of a 10% sodium dodecylbenzenesulfonate solution were added to 5.5 parts of a 5% lanthanum chloride solution, followed by three parts of nano-silica sol. The mixture was thoroughly mixed to obtain a shaking solution.

[0107] S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:3. The ball milling speed was 1250 r / min, and the milling time was 1.5 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium-modified boron nitride nanoparticles.

[0108] In this embodiment, the sheet-like boron nitride nanosheets have a sheet thickness of 2.5 nm; the oscillation power of the oscillation modification treatment is 375 W, and the oscillation time is 22 min.

[0109] The preparation method of the yttrium modifier in this embodiment is as follows:

[0110] Add 3 parts urea and 2 parts nano titanium dioxide to 7.5 parts sodium alginate solution, then add 1.5 parts silane coupling agent and 0.6 parts zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution;

[0111] Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 12.5 minutes at an irradiation power of 300W. After irradiation, 4.5 parts of the irradiated yttrium oxide agent were added to 8 parts of the conditioning and modifying liquid and stirred for conditioning. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent.

[0112] In this embodiment, the stirring temperature for the stirring adjustment process is 50°C, the stirring speed is 600 r / min, and the stirring time is 1.5 h.

[0113] The sodium alginate solution in this embodiment has a mass fraction of 12.5%; the silane coupling agent is silane coupling agent KH560.

[0114] The preparation method of the ball milling conditioner in this embodiment is as follows:

[0115] S101: Place pyrophyllite in a sufficient amount of potassium permanganate solution with a concentration of 1-2 mol / L and react for 3-4 hours at a reaction temperature of 65-70℃, then wash with water and dry.

[0116] S102: 5.5 parts of dried pyrophyllite, 3.5 parts of chitosan solution, 2 parts of phosphate buffer solution and 2 parts of sodium dodecyl sulfate are thoroughly mixed to obtain a ball milling conditioner.

[0117] In this embodiment, the chitosan solution has a mass fraction of 5.5%; the phosphate buffer solution has a pH value of 5.0.

[0118] This embodiment describes a method for preparing a nano-hard alloy CNC cutting tool material, comprising the following steps:

[0119] Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry.

[0120] Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1410°C for 47.5 min, followed by sintering at 1230°C for 75 min. After sintering, the nano-hard alloy CNC tool material of the present invention is obtained.

[0121] Comparative Example 1.

[0122] Unlike Example 3, no yttrium-modified boron nitride nanoparticles were added.

[0123] Comparative Example 2.

[0124] Unlike Example 3, no heat conditioning treatment was used in the preparation of the yttrium-modified nano boron nitride agent.

[0125] Comparative Example 3.

[0126] Unlike Example 3, no yttrium modifier was used in the preparation of the yttrium-modified nano boron nitride agent.

[0127] Comparative Example 4.

[0128] Unlike Example 3, the shaking liquid is replaced with a 10% sodium dodecylbenzenesulfonate solution.

[0129] Comparative Example 5.

[0130] Unlike Example 3, the heat conditioning treatment did not involve heating to 360°C at a rate of 2°C / min and holding at that temperature for 5 minutes.

[0131] Comparative Example 6.

[0132] Unlike Example 3, no ball milling conditioner was used.

[0133] Comparative Example 7.

[0134] Unlike Example 3, dried pyrophyllite was not added to the ball milling conditioner.

[0135] Comparative Example 8.

[0136] The difference from Example 3 is that step S102 in the ball milling conditioner is different. 5.5 parts of dried pyrophyllite and 7.5 parts of deionized water are fully mixed to obtain the ball milling conditioner.

[0137] The products of Examples 1-3 and Comparative Examples 1-8 were subjected to routine performance tests. Wear was measured using a friction and wear testing machine with a friction stroke of 1000m, a friction linear velocity of 0.6m / s, and a load of 40N. For the anti-fouling performance test, oil was applied to the product surface and allowed to dry naturally, then wiped, and the wiping force was tested. The test results are as follows.

[0138]

[0139] The product was placed at 105℃ for 12 hours, and then transferred to -5℃ for 12 hours. This test was repeated 20 times to test its stability under high and low temperature cycles.

[0140]

[0141]

[0142] As can be seen from Comparative Examples 1-8 and Examples 1-3;

[0143] The product in Example 3 has excellent fracture toughness, as well as excellent wear resistance and wiping force performance. The product can achieve coordinated improvement in fracture toughness, wear resistance, and easy-to-clean properties. In addition, the product has excellent stability under high and low temperature conditions.

[0144] The present invention does not include either yttrium-modified nano boron nitride agent or ball milling regulator treatment, which significantly degrades the product's performance and reduces its resistance to high and low temperatures. By combining the two, the product's performance is significantly improved.

[0145] In the preparation of yttrium-modified boron nitride nanoparticles, the absence of heat conditioning treatment, the lack of yttrium modifier treatment, the use of a 10% sodium dodecylbenzenesulfonate solution as the shaking liquid, and the failure to use a heat conditioning treatment that raises the temperature to 360°C at a rate of 2°C / min and holds it at that temperature for 5 minutes all resulted in a deterioration in the product's performance. The yttrium-modified boron nitride nanoparticles obtained using the method of this invention exhibited the most significant performance improvement. Furthermore, the inventors of this invention found that the absence of yttrium modifier treatment had a significant impact on the preparation of yttrium-modified boron nitride nanoparticles.

[0146] The performance of ball milling conditioners varies depending on whether dried pyrophyllite is added or the S102 step is different. When 5.5 parts of dried pyrophyllite and 7.5 parts of deionized water are fully mixed to obtain the ball milling conditioner, the performance of the products tends to deteriorate. Only the ball milling conditioner obtained by the method of this invention has the most significant performance effect.

[0147] This invention further explores the product performance through the preparation of yttrium modifiers;

[0148] Experimental Example 1.

[0149] The only difference from Example 3 is that no conditioning and modifying liquid was used in the preparation of the yttrium conditioning modifier.

[0150] Experimental Example 2.

[0151] The only difference from Example 3 is that no silane coupling agent was added to the conditioning and modification solution.

[0152] Experimental Example 3.

[0153] The only difference from Example 3 is that nano-titanium dioxide was not added to the modified liquid.

[0154] Experimental Example 4.

[0155] The only difference from Example 3 is that zirconium dioxide was not added to the conditioning solution.

[0156] Experimental Example 5.

[0157] The only difference from Example 3 is that urea was not added to the modified solution.

[0158] Experimental Example 6.

[0159] The only difference from Example 3 is that the sodium alginate solution is replaced with deionized water.

[0160] The product's performance was tested under conditions of high and low temperature resistance.

[0161]

[0162]

[0163] As can be seen from Experiments 1-6, the performance of the yttrium modifier changed significantly when the modifier was not treated with the modifier solution. Furthermore, the performance of the product deteriorated significantly when nano-titanium dioxide and zirconium dioxide were not added to the modifier solution. The combined use of these two modifiers resulted in a significant improvement in the product's performance. Additionally, the performance of the product deteriorated when silane coupling agent, urea, or sodium alginate solution was not added, or when deionized water was used instead of urea. Only the modifier solution of this invention produced the most significant performance improvement. Yttrium modifiers obtained by using other methods to replace the modifier solution did not exhibit the same performance improvement as those produced by this invention.

[0164] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0165] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nano-carbide CNC cutting tool material, characterized in that, Composed of the following raw materials in parts by weight: 45-50 parts of tungsten carbide powder with a particle size of 10 nm, 15-20 parts of cobalt powder, 5-7 parts of yttrium-modified nano boron nitride agent, and 6-10 parts of ball milling modifier; The preparation method of the yttrium-modified nano boron nitride agent is as follows: S01: Heat-modulated sheet-like boron nitride nanoparticles are obtained by heat-modulating sheet-like boron nitride nanoparticles. The sheet-like boron nitride nanoparticles are first heat-treated at 210~230℃ for 5~10 min, then heated to 350~370℃ at a rate of 1~3℃ / min and held for 5 min, and finally cooled to 55℃ at a rate of 2~5℃ / min and held for later use. S02: The heat-modified sheet-like boron nitride agent and the shaking liquid are shaken and modified at a weight ratio of 2:5 to obtain the shaken modified sheet-like boron nitride. Add 3-5 parts of a 10% sodium dodecylbenzenesulfonate solution to 4-7 parts of a 5% lanthanum chloride solution, then add 2-4 parts of nano-silica sol and mix thoroughly to obtain a shaking solution; S03: The oscillating modified sheet-like boron nitride nanoparticles and yttrium modifier were ball-milled at a weight ratio of 5:

3. The ball milling speed was 1000~1500 r / min, and the ball milling time was 1~2 h. After the ball milling was completed, the nanoparticles were washed with water and dried to obtain the yttrium modified boron nitride nanoparticles. The preparation method of the yttrium modifier is as follows: Add 2-4 parts of urea and 1-3 parts of nano titanium dioxide to 5-10 parts of sodium alginate solution, then add 1-2 parts of silane coupling agent and 0.5-0.7 parts of zirconium dioxide, stir thoroughly to obtain the conditioning and modification solution; Yttrium oxide powder was first placed in a proton irradiation chamber and irradiated for 10-15 minutes at an irradiation power of 300W. After irradiation, 3-6 parts of the irradiated yttrium oxide agent were added to 6-10 parts of the conditioning and modifying liquid and stirred and adjusted. After stirring and conditioning, the mixture was filtered and dried to obtain the yttrium conditioning and modifying agent. The preparation method of the ball milling conditioner is as follows: S101: Place pyrophyllite in a sufficient amount of potassium permanganate solution with a concentration of 1~2 mol / L and react for 3~4 hours at a reaction temperature of 65~70℃, then wash with water and dry. S102: Mix 4-7 parts of dried pyrophyllite, 2-5 parts of chitosan solution, 1-3 parts of phosphate buffer solution and 1-3 parts of sodium dodecyl sulfate thoroughly to obtain a ball milling conditioner.

2. The nano-hard alloy CNC cutting tool material according to claim 1, characterized in that, The nano-carbide CNC cutting tool material is composed of the following raw materials in parts by weight: The mixture consists of 47.5 parts of tungsten carbide powder with a particle size of 10 nm, 17.5 parts of cobalt powder, 6 parts of yttrium-modified nano boron nitride agent, and 8 parts of ball milling modifier.

3. The nano-hard alloy CNC cutting tool material according to claim 1, characterized in that, The sheet-like boron nitride nanosheets have a thickness of 2-3 nm; the oscillation power of the oscillation modification treatment is 350-400 W, and the oscillation time is 20-25 min.

4. The nano-hard alloy CNC cutting tool material according to claim 1, characterized in that, The stirring temperature for the stirring and conditioning process is 48~52℃, the stirring speed is 500~700r / min, and the stirring time is 1~2h.

5. The nano-hard alloy CNC cutting tool material according to claim 1, characterized in that, The sodium alginate solution has a mass fraction of 10-15%; the silane coupling agent is silane coupling agent KH560.

6. The nano-hard alloy CNC cutting tool material according to claim 1, characterized in that, The chitosan solution has a mass fraction of 4-7%; the phosphate buffer solution has a pH of 5.

0.

7. A method for preparing a nano-hard alloy CNC cutting tool material as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Mix tungsten carbide powder with a particle size of 10nm, cobalt powder, yttrium-modified nano boron nitride agent, and ball milling conditioner and ball mill thoroughly. The ball milling speed is 1500r / min, and the ball milling is carried out for 2 hours. After ball milling, wash with water and dry. Step 2: The product from Step 1 is fed into a mold and pressed into shape at a pressure of 15 MPa; then sintered at 1400~1420°C for 45~50 min, followed by sintering at 1220~1250°C for 70~80 min. After sintering, nano-hard alloy CNC tool material is obtained.

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