Nano wear-resistant composite material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of wear-resistant materials, in particular to a nano wear-resistant composite material and a preparation method and application thereof, and the nano wear-resistant composite material comprises the following raw materials in parts by weight: 45-50 parts of nano tungsten carbide, 10-15 parts of cobalt powder, 7-11 parts of a modified nano titanium nitride agent, 5-7 parts of nano neodymium oxide, and 4-6 parts of a nano TaC-doped complexing agent. According to the nano wear-resistant composite material, the nano tungsten carbide is matched with the cobalt powder and the nano neodymium oxide, the modified nano titanium nitride agent, the doped nano TaC and the synergist are coordinated and matched, and the raw materials are coordinated and synergistic, so that the wear resistance, the yield strength performance and the fatigue resistance of the obtained nano wear-resistant composite material are coordinated and improved; meanwhile, the product is excellent in performance stability under different degrees of salt corrosion conditions.

Description

Technical Field

[0001] The invention relates to the technical field of wear-resistant materials, and in particular to a nano-wear-resistant composite material and a preparation method and application thereof. Background Art

[0002] As the manufacturing industry moves towards high-end and intelligent development, higher requirements are placed on the operating efficiency, reliability and service life of equipment. Nanocomposites, as a new type of material, have attracted much attention due to their unique microstructure and excellent macroscopic properties.

[0003] In order to optimize the wear resistance of the product, the composite materials in the existing technology easily lead to poor yield strength and fatigue resistance of the product, and it is difficult to achieve coordinated improvement in the performance of the product. At the same time, the product has poor stability under different degrees of salt corrosion conditions, which limits the product's use efficiency. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a nano-antiwear composite material and a preparation method and application thereof, so as to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a nano anti-wear composite material, comprising the following raw materials in parts by weight: 45-50 parts of nano tungsten carbide, 10-15 parts of cobalt powder, 7-11 parts of modified nano titanium nitride agent, 5-7 parts of nano neodymium oxide, and 4-6 parts of doped nano TaC and synergist.

[0006] Preferably, the particle size of the cobalt powder is 0.2-0.3 µm; the particle size of the nano-tungsten carbide is 30-40 nm; and the particle size of the nano-neodymium oxide is 45-55 nm.

[0007] Preferably, the preparation method of the modified nano titanium nitride agent is: S01: irradiating nano titanium nitride in a plasma box for 5 to 10 minutes at an irradiation power of 400 W, and obtaining irradiated nano titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride is heat-treated at 155-160° C. for 1 hour, and then cooled to 55° C. at a rate of 1-3° C. / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of (2-4): (3-5): 7 to obtain silane liquid; 2 to 4 parts by weight of nano boron oxide and 3 to 5 parts by weight of silicon carbide fiber are added to 5 to 8 parts by weight of silane liquid and stirred sufficiently to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

[0008] Preferably, the ultrasonic power of the ultrasonic modification treatment is 450-550W, and the ultrasonic treatment is for 1 hour; the stirring temperature of the stirring treatment is 48°C, the stirring speed is 500-550r / min, and the stirring time is 1 minute.

[0009] The modified nano titanium nitride agent adopts nano titanium nitride through plasma treatment to optimize its activity performance, and then improves it through heat treatment to optimize its activity performance. At the same time, it is combined with ultrasonic improvement treatment of the modification liquid, and the nano boron oxide and silicon carbide fiber in the modification liquid are blended with silane liquid. The silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in the silane liquid are stirred and improved. Through the coordination and matching between the raw materials, the nano boron oxide, silicon carbide fiber and other raw materials are coordinated and reinforced into the system, so that the performance of the product is further improved.

[0010] Preferably, the mass fraction of the sodium silicate aqueous solution is 5-8%.

[0011] Preferably, the preparation method of the additive is: 3-5 parts by weight of chromium carbide, 2-4 parts by weight of nano-strontium titanate and 5-8 parts by weight of sodium dodecylbenzene sulfonate solution are uniformly mixed, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and mixed sufficiently, and finally filtered and dried to obtain an additive.

[0012] The chromium carbide and nano-strontium titanate in the additive are adjusted with the sodium dodecylbenzene sulfonate solution, and the original blending and optimization are combined with carbon nanotubes with high specific surface area, and the urea solution is optimized at the same time. The blending and coordination between the raw materials are adopted to further reinforce the modified liquid of nano-titanium nitride, and the modified nano-titanium nitride agent thus prepared further optimizes the performance effect of the product in the system. The additive is added with raw materials such as chromium carbide, nano-strontium titanate and carbon nanotubes, and the product performance is further optimized through the coordination between the raw materials. The additive can enhance the performance effect of the product by adding raw materials.

[0013] Preferably, the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%; the mass fraction of the urea solution is 3-5%.

[0014] Preferably, the preparation method of the synergist doped with nano-TaC is: S11: 4 to 7 parts by weight of boron nitride whiskers and 2 to 4 parts by weight of vanadium carbide powder are mixed and added into 5 to 8 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 55-60° C. for 1 hour to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

[0015] Nano-TaC is thermally improved to optimize its active performance, thereby harmonizing the whiskers and synergistic liquid. The boron nitride whiskers, vanadium carbide powder and sodium carboxymethyl cellulose liquid in the whiskers and synergistic liquid are fully blended, and the sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in the sodium carboxymethyl cellulose liquid are further harmonized and optimized. The whisker-like structure of the boron nitride whiskers is used to harmonize the system raw materials and further reinforce the system, so that the synergistic agent doped with nano-TaC and the modified nano-titanium nitride agent are further coordinated and synergized. The synergistic agent doped with nano-TaC is harmonized and coordinated by raw materials such as boron nitride whiskers and vanadium carbide powder and filled into the system, so the synergistic agent can play a role of harmonization and synergy, and the performance of the product is further improved.

[0016] Preferably, the mass fraction of the lanthanum chloride solution is 4-6%.

[0017] The present invention also provides a method for preparing the nano anti-wear composite material, comprising the following steps: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

[0018] The invention also provides an application of the nano anti-wear composite material in hard alloy.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The nano-wear-resistant composite material of the present invention adopts nano-tungsten carbide, cobalt powder and nano-neodymium oxide, and is coordinated and matched by a modified nano-titanium nitride agent and a doped nano-TaC and a synergist. Through the coordinated and synergistic effect between the raw materials, the wear resistance, yield strength performance and fatigue resistance of the obtained nano-wear-resistant composite material are coordinated and improved. At the same time, the product has excellent performance stability under different degrees of salt corrosion conditions. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] A nano-antiwear composite material of this embodiment includes the following raw materials in parts by weight: 45-50 parts of nano tungsten carbide, 10-15 parts of cobalt powder, 7-11 parts of modified nano titanium nitride agent, 5-7 parts of nano neodymium oxide, and 4-6 parts of doped nano TaC and synergist.

[0022] The particle size of the cobalt powder in this embodiment is 0.2-0.3 µm; the particle size of the nano-tungsten carbide is 30-40 nm; and the particle size of the nano-neodymium oxide is 45-55 nm.

[0023] The preparation method of the modified nano titanium nitride agent of this embodiment is: S01: irradiating nano titanium nitride in a plasma box for 5 to 10 minutes at an irradiation power of 400 W, and obtaining irradiated nano titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride is heat-treated at 155-160° C. for 1 hour, and then cooled to 55° C. at a rate of 1-3° C. / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of (2-4): (3-5): 7 to obtain silane liquid; 2 to 4 parts by weight of nano boron oxide and 3 to 5 parts by weight of silicon carbide fiber are added to 5 to 8 parts by weight of silane liquid and stirred sufficiently to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

[0024] The ultrasonic power of the ultrasonic modification treatment in this embodiment is 450-550W, and the ultrasonic treatment is for 1h; the stirring temperature of the stirring treatment is 48°C, the stirring speed is 500-550r / min, and the stirring time is 1min.

[0025] The mass fraction of the sodium silicate aqueous solution in this embodiment is 5-8%.

[0026] The preparation method of the additive of this embodiment is: 3-5 parts by weight of chromium carbide, 2-4 parts by weight of nano-strontium titanate and 5-8 parts by weight of sodium dodecylbenzene sulfonate solution are uniformly mixed, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and mixed sufficiently, and finally filtered and dried to obtain an additive.

[0027] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 5-8%; the mass fraction of the urea solution is 3-5%.

[0028] Preferably, the preparation method of the synergist doped with nano-TaC is: S11: 4 to 7 parts by weight of boron nitride whiskers and 2 to 4 parts by weight of vanadium carbide powder are mixed and added into 5 to 8 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 55-60° C. for 1 hour to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

[0029] The mass fraction of the lanthanum chloride solution in this embodiment is 4-6%.

[0030] A method for preparing a nano-antiwear composite material in this embodiment comprises the following steps: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

[0031] The invention also provides an application of the nano anti-wear composite material in hard alloy.

[0032] Example 1 A nano-antiwear composite material of this embodiment includes the following raw materials in parts by weight: 45 parts of nano tungsten carbide, 10 parts of cobalt powder, 7 parts of modified nano titanium nitride agent, 5 parts of nano neodymium oxide, and 4 parts of doped nano TaC and synergist.

[0033] The particle size of the cobalt powder in this embodiment is 0.2 μm; the particle size of the nano-tungsten carbide is 30 nm; and the particle size of the nano-neodymium oxide is 45 nm.

[0034] The preparation method of the modified nano titanium nitride agent of this embodiment is: S01: irradiating nano-titanium nitride in a plasma box for 5 minutes at an irradiation power of 400 W, and obtaining irradiated nano-titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride was heat treated at 155°C for 1 h, and then cooled to 55°C at a rate of 1°C / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of 2:3:7 to obtain silane liquid; 2 parts by weight of nano boron oxide and 3 parts by weight of silicon carbide fiber are added to 5 parts by weight of silane liquid and stirred thoroughly to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

[0035] The ultrasonic power of the ultrasonic modification treatment in this embodiment is 450W, and the ultrasonic treatment is for 1 hour; the stirring temperature of the stirring treatment is 48°C, the stirring speed is 500r / min, and the stirring time is 1min.

[0036] The mass fraction of the sodium silicate aqueous solution in this embodiment is 5%.

[0037] The preparation method of the additive of this embodiment is: 3 parts by weight of chromium carbide, 2 parts by weight of nano-strontium titanate and 5 parts by weight of sodium dodecylbenzene sulfonate solution are uniformly mixed, and then 2 parts by weight of carbon nanotubes and 1 part by weight of urea solution are added and mixed thoroughly, and finally filtered and dried to obtain an additive.

[0038] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 5%; the mass fraction of the urea solution is 3%.

[0039] The preparation method of the synergist doped with nano-TaC in this embodiment is as follows: S11: 4 parts by weight of boron nitride whiskers and 2 parts by weight of vanadium carbide powder are mixed and added into 5 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 55° C. for 1 h to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

[0040] The mass fraction of the lanthanum chloride solution of the present embodiment is 4%.

[0041] A method for preparing a nano-antiwear composite material in this embodiment comprises the following steps: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

[0042] Example 2 A nano-antiwear composite material of this embodiment includes the following raw materials in parts by weight: 50 parts of nano tungsten carbide, 15 parts of cobalt powder, 11 parts of modified nano titanium nitride agent, 7 parts of nano neodymium oxide, and 6 parts of doped nano TaC and synergist.

[0043] The particle size of the cobalt powder in this embodiment is 0.3 μm; the particle size of the nano-tungsten carbide is 40 nm; and the particle size of the nano-neodymium oxide is 55 nm.

[0044] The preparation method of the modified nano titanium nitride agent of this embodiment is: S01: irradiating nano-titanium nitride in a plasma box for 10 minutes at an irradiation power of 400 W, and obtaining irradiated nano-titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride was heat treated at 160°C for 1 h, and then cooled to 55°C at a rate of 3°C / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of 4:5:7 to obtain silane liquid; 4 parts by weight of nano boron oxide and 5 parts by weight of silicon carbide fiber are added to 8 parts by weight of silane liquid and stirred thoroughly to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

[0045] The ultrasonic power of the ultrasonic modification treatment in this embodiment is 550W, and the ultrasonic treatment is performed for 1 hour. The stirring temperature of the stirring treatment is 48°C, the stirring speed is 550r / min, and the stirring time is 1 minute.

[0046] The mass fraction of the sodium silicate aqueous solution in this embodiment is 8%.

[0047] The preparation method of the additive of this embodiment is: 5 parts by weight of chromium carbide, 4 parts by weight of nano-strontium titanate and 8 parts by weight of sodium dodecylbenzene sulfonate solution are uniformly mixed, and then 3 parts by weight of carbon nanotubes and 2 parts by weight of urea solution are added and mixed thoroughly, and finally filtered and dried to obtain an additive.

[0048] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 8%; the mass fraction of the urea solution is 5%.

[0049] The preparation method of the synergist doped with nano-TaC is as follows: S11: 7 parts by weight of boron nitride whiskers and 4 parts by weight of vanadium carbide powder are mixed and added into 8 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 60° C. for 1 h to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

[0050] The mass fraction of the lanthanum chloride solution of the present embodiment is 6%.

[0051] A method for preparing a nano-antiwear composite material in this embodiment comprises the following steps: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

[0052] Example 3 A nano-antiwear composite material of this embodiment includes the following raw materials in parts by weight: 47.5 parts of nano tungsten carbide, 12.5 parts of cobalt powder, 9 parts of modified nano titanium nitride agent, 6 parts of nano neodymium oxide, and 5 parts of doped nano TaC and synergist.

[0053] The particle size of the cobalt powder in this embodiment is 0.25 μm; the particle size of the nano-tungsten carbide is 35 nm; and the particle size of the nano-neodymium oxide is 50 nm.

[0054] The preparation method of the modified nano titanium nitride agent of this embodiment is: S01: irradiating nano-titanium nitride in a plasma box for 7.5 minutes at an irradiation power of 400 W, and obtaining irradiated nano-titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride was heat treated at 157°C for 1 h, and then cooled to 55°C at a rate of 2°C / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of 3:4:7 to obtain silane liquid; 3 parts by weight of nano boron oxide and 4 parts by weight of silicon carbide fiber are added to 6.5 parts by weight of silane liquid and stirred thoroughly to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1250 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

[0055] The ultrasonic power of the ultrasonic modification treatment in this embodiment is 475W, and the ultrasonic treatment is performed for 1 hour. The stirring temperature of the stirring treatment is 48°C, the stirring speed is 520r / min, and the stirring time is 1min.

[0056] The mass fraction of the sodium silicate aqueous solution in this embodiment is 6.5%.

[0057] The preparation method of the additive of this embodiment is: 4 parts by weight of chromium carbide, 3 parts by weight of nano-strontium titanate and 6.5 parts by weight of sodium dodecylbenzene sulfonate solution were evenly mixed, and then 2.5 parts by weight of carbon nanotubes and 1.5 parts by weight of urea solution were added and mixed thoroughly, and finally filtered and dried to obtain an additive.

[0058] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 6.5%; the mass fraction of the urea solution is 4%.

[0059] The preparation method of the synergist doped with nano-TaC in this embodiment is as follows: S11: 5.5 parts by weight of boron nitride whiskers and 3 parts by weight of vanadium carbide powder are mixed and added into 6.5 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 57.5° C. for 1 h to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

[0060] The mass fraction of the lanthanum chloride solution of the present embodiment is 5%.

[0061] A method for preparing a nano-antiwear composite material in this embodiment comprises the following steps: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

[0062] Comparative Example 1 The difference from Example 3 is that no modified nano titanium nitride agent is added.

[0063] Comparative Example 2 The difference from Example 3 is that no nano-titanium nitride modifying liquid is added in the preparation of the modified nano-titanium nitride agent.

[0064] Comparative Example 3 The difference from Example 3 is that no pretreated nano-titanium nitride is added in the preparation of the modified solution of nano-titanium nitride.

[0065] Comparative Example 4 The difference from Example 3 is that no modifying liquid is added in the preparation of the modifying liquid of nano titanium nitride.

[0066] Comparative Example 5 The difference from Example 3 is that no nano boron oxide or silicon carbide fiber is added to the modified solution.

[0067] Comparative Example 6 The difference from Example 3 is that no additive is added in the preparation of the modified nano titanium nitride agent.

[0068] Comparative Example 7 The difference from Example 3 is that no chromium carbide or nano-strontium titanate is added in the preparation of the additive.

[0069] Comparative Example 8 The difference from Example 3 is that no carbon nanotubes and urea solution are added in the preparation of the additive.

[0070] Comparative Example 9 The difference from Example 3 is that no synergist for doping nano-TaC is added.

[0071] Comparative Example 10 The difference from Example 3 is that no heat-treated nano-TaC powder is added in the preparation of the synergist for doping nano-TaC.

[0072] Comparative Example 11 The difference from Example 3 is that no whisker synergistic liquid is added in the preparation of the synergistic agent doped with nano-TaC.

[0073] Comparative Example 12 The difference from Example 3 is that no boron nitride whiskers or vanadium carbide powder is added in the preparation of whiskers and synergistic solution.

[0074] Comparative Example 13 The difference from Example 3 is that no sodium carboxymethyl cellulose solution is added in the preparation of the whisker and coordination solution.

[0075] The products of Examples 1-3 and Comparative Examples 1-13 were tested for wear resistance (using a wear tester, loading force 20N, wear speed 15m / min, wear time 100min), yield strength performance and fatigue resistance under normal conditions, and were placed under 5% sodium chloride salt spray conditions for 24h and 8% sodium chloride salt spray conditions for 24h, respectively, to test the wear resistance, yield strength performance and fatigue resistance under different degrees of salt corrosion, and the performance measurement results are as follows:

[0076] It can be concluded from Examples 1-3 and Comparative Examples 1-13 that the product of Example 3 of the present invention has excellent wear resistance, yield strength performance and fatigue resistance under normal conditions, and the product can achieve coordinated improvement, and at the same time, still has excellent performance stability under different degrees of salt corrosion conditions; It can be seen from comparative examples 1-13 and embodiment 3 that the performance effect of the product is significantly deteriorated when the modified nano titanium nitride agent, the doped nano TaC and the synergist are not added to the product; the performance effect of the product is significantly improved when the two agents are coordinated and synergistic. The performance of the products showed a trend of deterioration to varying degrees when the modified solution of nano titanium nitride was not added to the modified solution of nano titanium nitride, the modified solution of nano titanium nitride was not added to the modified solution, nano boron oxide and silicon carbide fiber were not added to the modified solution, the additive was not added to the modified nano titanium nitride agent, chromium carbide and nano strontium titanate were not added to the additive, and carbon nanotubes and urea solution were not added to the additive. The modified liquid of nano titanium nitride made by the modified liquid obtained by the specific method of the present invention, and the modified nano titanium nitride agent made by the coordinated combination of the additive obtained by the specific method of the present invention, have the most significant performance effect of the product, and the effect of using other methods instead is not as obvious as that of the present invention; The performance of the products tends to deteriorate when the heat-treated nano-TaC powder is not added in the preparation of the synergist of the doped nano-TaC, the whisker synergist liquid is not added in the preparation of the synergist of the doped nano-TaC, the boron nitride whisker and the vanadium carbide powder are not added in the preparation of the whisker synergist liquid, and the sodium carboxymethyl cellulose liquid is not added in the preparation of the whisker synergist liquid. The performance effect of the product is the most significant.

[0077] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0078] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A nano anti-wear composite material, characterized in that: It includes the following raw materials in parts by weight: 45-50 parts of nano tungsten carbide, 10-15 parts of cobalt powder, 7-11 parts of modified nano titanium nitride agent, 5-7 parts of nano neodymium oxide, and 4-6 parts of doped nano TaC and synergist.

2. The anti-wear nano composite material according to claim 1, characterized in that: The particle size of the cobalt powder is 0.2-0.3 μm; the particle size of the nano-tungsten carbide is 30-40 nm; and the particle size of the nano-neodymium oxide is 45-55 nm.

3. The anti-wear nano composite material according to claim 1, characterized in that: The preparation method of the modified nano titanium nitride agent is: S01: irradiating nano titanium nitride in a plasma box for 5 to 10 minutes at an irradiation power of 400 W, and obtaining irradiated nano titanium nitride after the irradiation is completed; The irradiated nano-titanium nitride is heat-treated at 155-160° C. for 1 hour, and then cooled to 55° C. at a rate of 1-3° C. / min to obtain pretreated nano-titanium nitride; S02: Stirring silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in a weight ratio of (2-4): (3-5): 7 to obtain silane liquid; Add 2 to 4 parts by weight of nano boron oxide and 3 to 5 parts by weight of silicon carbide fiber to 5 to 8 parts by weight of silane liquid and stir thoroughly to obtain a modified liquid; S03: The pretreated nano-titanium nitride and the modified liquid are subjected to ultrasonic modification treatment in a weight ratio of 3:5, and after the ultrasonic treatment is completed, a modified liquid of nano-titanium nitride is obtained; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4, and the mixture is ball-milled at a speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified nano titanium nitride agent.

4. The anti-wear nano composite material according to claim 3, characterized in that: The ultrasonic power of the ultrasonic modification treatment is 450-550W, and the ultrasonic treatment is for 1h; the stirring temperature of the stirring treatment is 48°C, the stirring speed is 500-550r / min, and the stirring time is 1min; the mass fraction of the sodium silicate aqueous solution is 5-8%.

5. The anti-wear nano composite material according to claim 3, characterized in that: The preparation method of the additive is: 3-5 parts by weight of chromium carbide, 2-4 parts by weight of nano-strontium titanate and 5-8 parts by weight of sodium dodecylbenzene sulfonate solution are uniformly mixed, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and mixed sufficiently, and finally filtered and dried to obtain an additive.

6. The anti-wear nano composite material according to claim 5, characterized in that: The mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%; the mass fraction of the urea solution is 3-5%.

7. The anti-wear nano composite material according to claim 1, characterized in that: The preparation method of the doped nano-TaC synergist is as follows: S11: 4 to 7 parts by weight of boron nitride whiskers and 2 to 4 parts by weight of vanadium carbide powder are mixed and added into 5 to 8 parts by weight of sodium carboxymethyl cellulose solution and stirred sufficiently to obtain whiskers and a synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully mixing sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1; S12: Nano-TaC is heat-treated at 55-60° C. for 1 hour to obtain heat-treated nano-TaC powder, and the heat-treated nano-TaC powder and whisker synergistic liquid are fully stirred in a weight ratio of 3:5, and then filtered and dried to obtain a synergistic agent doped with nano-TaC.

8. The anti-wear nano composite material according to claim 7, characterized in that: The mass fraction of the lanthanum chloride solution is 4-6%.

9. The method for preparing the anti-wear nano composite material according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw materials are mixed evenly according to the proportion, and then pressed into shape under 200MPa conditions for 10 minutes, and then sintered at a sintering temperature of 1460°C for 3 hours to obtain a nano-anti-wear composite material.

10. Use of the anti-wear nano composite material according to any one of claims 1 to 8 in cemented carbide.

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