A nano-anti-wear composite material and its preparation method and application

Abstract

The present invention relates to the technical field of wear-resistant materials, and more particularly to a nano-wear-resistant composite material, a preparation method thereof, and an application thereof. The 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 modified nano-titanium nitride, 5-7 parts of nano-neodymium oxide, and 4-6 parts of a synergistic agent doped with nano-TaC. The nano-wear-resistant composite material of the present invention utilizes nano-tungsten carbide in combination with cobalt powder and nano-neodymium oxide, and is further coordinated with the modified nano-titanium nitride and the synergistic agent doped with nano-TaC. Through the coordinated coordination and synergistic effect between the raw materials, the resulting nano-wear-resistant composite material achieves coordinated improvements in wear resistance, yield strength, and fatigue resistance. Furthermore, the product exhibits excellent performance stability under varying degrees of salt corrosion conditions.

Description

Technical Field

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

[0002] As the manufacturing industry moves toward high-end and intelligent manufacturing, 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, making it difficult to achieve coordinated performance improvements of the product. At the same time, the product has poor stability under different degrees of salt corrosion conditions, which limits the product's efficiency. Summary of the Invention

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

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

[0006] The present invention provides a nano-anti-wear composite material, comprising the following raw materials in parts by weight:

[0007] 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 synergistic agent.

[0008] 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.

[0009] Preferably, the preparation method of the modified nano titanium nitride agent is:

[0010] S01: irradiating nano-titanium nitride in a plasma box for 5 to 10 minutes at an irradiation power of 400 W. After the irradiation is completed, irradiated nano-titanium nitride is obtained;

[0011] 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;

[0012] S02: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of (2-4): (3-5): 7 to obtain a silane solution;

[0013] 2-4 parts by weight of nano-boron oxide and 3-5 parts by weight of silicon carbide fiber are added to 5-8 parts by weight of silane solution and stirred thoroughly to obtain a modified solution;

[0014] S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed;

[0015] S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4 and ball-milled at a ball-milling speed of 1000-1500 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.

[0016] Preferably, the ultrasonic power of the ultrasonic modification treatment is 450-550W, and the ultrasonic treatment is performed for 1 hour; the stirring temperature of the stirring treatment is 48°C, the stirring speed is 500-550 r / min, and the stirring time is 1 minute.

[0017] The modified nano titanium nitride agent uses 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. The nano boron oxide and silicon carbide fiber in the modification liquid are blended with the silane liquid. The silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent in the silane liquid are stirred and improved. Through the blending and coordination between the raw materials, 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.

[0018] Preferably, the mass fraction of the sodium silicate aqueous solution is 5-8%.

[0019] Preferably, the preparation method of the additive is:

[0020] 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 dodecylbenzenesulfonate solution are evenly blended, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and blended fully, and finally filtered and dried to obtain an additive.

[0021] The chromium carbide and nano-strontium titanate in the additive are adjusted with the sodium dodecylbenzene sulfonate solution. Through the original adjustment and optimization, they are combined with carbon nanotubes with high specific surface area, and the urea solution is optimized at the same time. The raw materials are coordinated and matched to reinforce the modified liquid of nano-titanium nitride. The modified nano-titanium nitride agent thus prepared further optimizes the performance of the product in the system. The additive is added with raw materials such as chromium carbide, nano-strontium titanate and carbon nanotubes. Through the coordination between the raw materials, the product performance is further optimized. The additive can play a role in enhancing the performance of the product by adding raw materials.

[0022] Preferably, the mass fraction of the sodium dodecylbenzenesulfonate solution is 5-8%; the mass fraction of the urea solution is 3-5%.

[0023] Preferably, the preparation method of the synergist doped with nano-TaC is:

[0024] S11: 4 to 7 parts by weight of boron nitride whiskers and 2 to 4 parts by weight of vanadium carbide powder are blended and added to 5 to 8 parts by weight of sodium carboxymethyl cellulose solution, and stirred thoroughly to obtain a whisker and synergistic solution;

[0025] The sodium carboxymethyl cellulose solution is prepared by fully blending sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1;

[0026] 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.

[0027] 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, thereby further coordinating and synergizing the prepared doped nano-TaC and modified nano-titanium nitride agent. The doped nano-TaC synergistic agent 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.

[0028] Preferably, the mass fraction of the lanthanum chloride solution is 4-6%.

[0029] The present invention also provides a method for preparing the nano-anti-wear composite material, comprising the following steps:

[0030] 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 present invention also provides an application of the nano anti-wear composite material in hard alloy.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The nano-wear-resistant composite material of the present invention adopts nano-tungsten carbide, cobalt powder and nano-neodymium oxide, and then coordinates and cooperates with a modified nano-titanium nitride agent and a doped nano-TaC agent. Through the coordinated coordination and synergistic effect between the raw materials, the wear resistance, yield strength 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

[0034] 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 making creative efforts are within the scope of protection of the present invention.

[0035] The anti-wear nano composite material of this embodiment includes the following raw materials in parts by weight:

[0036] 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 synergistic agent.

[0037] 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.

[0038] The preparation method of the modified nano titanium nitride agent of this embodiment is:

[0039] S01: irradiating nano-titanium nitride in a plasma box for 5 to 10 minutes at an irradiation power of 400 W. After the irradiation is completed, irradiated nano-titanium nitride is obtained;

[0040] 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;

[0041] S02: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of (2-4): (3-5): 7 to obtain a silane solution;

[0042] 2-4 parts by weight of nano-boron oxide and 3-5 parts by weight of silicon carbide fiber are added to 5-8 parts by weight of silane solution and stirred thoroughly to obtain a modified solution;

[0043] S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed;

[0044] S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4 and ball-milled at a ball-milling speed of 1000-1500 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] In the ultrasonic modification treatment of this embodiment, the ultrasonic power is 450-550W, and the ultrasonic treatment is performed for 1 hour. The stirring temperature of the stirring treatment is 48°C, the stirring speed is 500-550 r / min, and the stirring time is 1 minute.

[0046] The mass fraction of the sodium silicate aqueous solution in this embodiment is 5-8%.

[0047] The preparation method of the additive of this embodiment is:

[0048] 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 dodecylbenzenesulfonate solution are evenly blended, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and blended fully, and finally filtered and dried to obtain an additive.

[0049] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5-8%; the mass fraction of the urea solution is 3-5%.

[0050] Preferably, the preparation method of the synergist doped with nano-TaC is:

[0051] S11: 4 to 7 parts by weight of boron nitride whiskers and 2 to 4 parts by weight of vanadium carbide powder are blended and added to 5 to 8 parts by weight of sodium carboxymethyl cellulose solution, and stirred thoroughly to obtain a whisker and synergistic solution;

[0052] The sodium carboxymethyl cellulose solution is prepared by fully blending sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1;

[0053] 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.

[0054] The mass fraction of the lanthanum chloride solution in this embodiment is 4-6%.

[0055] A method for preparing a nano-anti-wear composite material of this embodiment comprises the following steps:

[0056] 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.

[0057] The present invention also provides an application of the nano anti-wear composite material in hard alloy.

[0058] Example 1

[0059] The anti-wear nano composite material of this embodiment includes the following raw materials in parts by weight:

[0060] 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 synergistic agent.

[0061] 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.

[0062] The preparation method of the modified nano titanium nitride agent of this embodiment is:

[0063] S01: irradiating nano-titanium nitride in a plasma box for 5 minutes at an irradiation power of 400W, and obtaining irradiated nano-titanium nitride after the irradiation is completed;

[0064] 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;

[0065] S02: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of 2:3:7 to obtain a silane solution;

[0066] 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 solution and stirred thoroughly to obtain a modified solution;

[0067] S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed;

[0068] 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.

[0069] In the ultrasonic modification treatment of this embodiment, the ultrasonic power is 450W, and the ultrasonic treatment is performed for 1 hour. The stirring temperature of the stirring treatment is 48°C, the stirring speed is 500 r / min, and the stirring time is 1 minute.

[0070] The mass fraction of the sodium silicate aqueous solution in this embodiment is 5%.

[0071] The preparation method of the additive of this embodiment is:

[0072] 3 parts by weight of chromium carbide, 2 parts by weight of nano-strontium titanate and 5 parts by weight of sodium dodecylbenzenesulfonate solution were evenly blended, and then 2 parts by weight of carbon nanotubes and 1 part by weight of urea solution were added and blended thoroughly, and finally filtered and dried to obtain an additive.

[0073] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5%; the mass fraction of the urea solution is 3%.

[0074] The preparation method of the synergist doped with nano-TaC in this embodiment is as follows:

[0075] S11: 4 parts by weight of boron nitride whiskers and 2 parts by weight of vanadium carbide powder are blended and added into 5 parts by weight of sodium carboxymethyl cellulose solution and stirred thoroughly to obtain a whisker and synergistic solution;

[0076] The sodium carboxymethyl cellulose solution is prepared by fully blending sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1;

[0077] S12: Nano-TaC is heat-treated at 55° 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.

[0078] The mass fraction of the lanthanum chloride solution of the present embodiment is 4%.

[0079] A method for preparing a nano-anti-wear composite material of this embodiment comprises the following steps:

[0080] 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.

[0081] Example 2

[0082] The anti-wear nano composite material of this embodiment includes the following raw materials in parts by weight:

[0083] 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 synergistic agent.

[0084] 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.

[0085] The preparation method of the modified nano titanium nitride agent of this embodiment is:

[0086] S01: irradiating nano-titanium nitride in a plasma box for 10 minutes at an irradiation power of 400W. After the irradiation is completed, irradiated nano-titanium nitride is obtained;

[0087] 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;

[0088] S02: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of 4:5:7 to obtain a silane solution;

[0089] 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 solution and stirred thoroughly to obtain a modified solution;

[0090] S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed;

[0091] S04: The modified solution of nano-titanium nitride and the additive are mixed in a weight ratio of 5:4, and ball-milled at a ball-milling 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.

[0092] In the ultrasonic modification treatment of this embodiment, the ultrasonic power 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.

[0093] The mass fraction of the sodium silicate aqueous solution in this embodiment is 8%.

[0094] The preparation method of the additive of this embodiment is:

[0095] 5 parts by weight of chromium carbide, 4 parts by weight of nano-strontium titanate and 8 parts by weight of sodium dodecylbenzenesulfonate solution were evenly blended, and then 3 parts by weight of carbon nanotubes and 2 parts by weight of urea solution were added and blended thoroughly, and finally filtered and dried to obtain an additive.

[0096] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 8%; the mass fraction of the urea solution is 5%.

[0097] The preparation method of the synergist doped with nano-TaC is as follows:

[0098] S11: 7 parts by weight of boron nitride whiskers and 4 parts by weight of vanadium carbide powder are blended and added into 8 parts by weight of sodium carboxymethyl cellulose solution and stirred thoroughly to obtain a whisker and synergistic solution;

[0099] The sodium carboxymethyl cellulose solution is prepared by fully blending sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1;

[0100] S12: Nano-TaC is heat-treated at 60° C. for 1 hour to obtain heat-treated nano-TaC powder. 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.

[0101] The mass fraction of the lanthanum chloride solution of the present embodiment is 6%.

[0102] A method for preparing a nano-anti-wear composite material of this embodiment comprises the following steps:

[0103] 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.

[0104] Example 3

[0105] The anti-wear nano composite material of this embodiment includes the following raw materials in parts by weight:

[0106] 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 synergistic agent.

[0107] 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.

[0108] The preparation method of the modified nano titanium nitride agent of this embodiment is:

[0109] S01: irradiating nano-titanium nitride in a plasma box for 7.5 minutes at an irradiation power of 400 W. After the irradiation is completed, irradiated nano-titanium nitride is obtained;

[0110] 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;

[0111] S02: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of 3:4:7 to obtain a silane solution;

[0112] 3 parts by weight of nano-boron oxide and 4 parts by weight of silicon carbide fiber were added to 6.5 parts by weight of silane solution and stirred thoroughly to obtain a modified solution;

[0113] S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed;

[0114] S04: The modified solution of nano-titanium nitride and the additive are mixed in a weight ratio of 5:4, and ball-milled at a ball-milling 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.

[0115] In the ultrasonic modification treatment of this embodiment, the ultrasonic power 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 520 r / min, and the stirring time is 1 minute.

[0116] The mass fraction of the sodium silicate aqueous solution in this embodiment is 6.5%.

[0117] The preparation method of the additive of this embodiment is:

[0118] 4 parts by weight of chromium carbide, 3 parts by weight of nano-strontium titanate and 6.5 parts by weight of sodium dodecylbenzenesulfonate solution were evenly blended, and then 2.5 parts by weight of carbon nanotubes and 1.5 parts by weight of urea solution were added and blended thoroughly, and finally filtered and dried to obtain an additive.

[0119] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 6.5%; the mass fraction of the urea solution is 4%.

[0120] The preparation method of the synergist doped with nano-TaC in this embodiment is as follows:

[0121] S11: 5.5 parts by weight of boron nitride whiskers and 3 parts by weight of vanadium carbide powder are blended and added into 6.5 parts by weight of sodium carboxymethyl cellulose solution, and stirred thoroughly to obtain a whisker and synergistic solution;

[0122] The sodium carboxymethyl cellulose solution is prepared by fully blending sodium carboxymethyl cellulose, lanthanum chloride solution and nano-silica sol in a weight ratio of 2:5:1;

[0123] S12: Nano-TaC is heat-treated at 57.5° C. for 1 hour to obtain heat-treated nano-TaC powder. 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.

[0124] The mass fraction of the lanthanum chloride solution of the present embodiment is 5%.

[0125] A method for preparing a nano-anti-wear composite material of this embodiment comprises the following steps:

[0126] 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.

[0127] Comparative Example 1

[0128] The difference from Example 3 is that no modified nano titanium nitride agent is added.

[0129] Comparative Example 2

[0130] 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.

[0131] Comparative Example 3

[0132] 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.

[0133] Comparative Example 4

[0134] The difference from Example 3 is that no modifying liquid is added during the preparation of the modifying liquid of nano-titanium nitride.

[0135] Comparative Example 5

[0136] The difference from Example 3 is that no nano boron oxide or silicon carbide fiber is added to the modified solution.

[0137] Comparative Example 6

[0138] The difference from Example 3 is that no additive is added in the preparation of the modified nano-titanium nitride agent.

[0139] Comparative Example 7

[0140] The difference from Example 3 is that no chromium carbide or nano-strontium titanate is added in the preparation of the additive.

[0141] Comparative Example 8

[0142] The difference from Example 3 is that no carbon nanotubes and urea solution are added during the preparation of the additive.

[0143] Comparative Example 9

[0144] The difference from Example 3 is that no synergist for doping nano-TaC is added.

[0145] Comparative Example 10

[0146] The difference from Example 3 is that no heat-treated nano-TaC powder is added in the preparation of the synergistic agent doped with nano-TaC.

[0147] Comparative Example 11

[0148] The difference from Example 3 is that no whisker synergistic liquid is added in the preparation of the synergistic agent doped with nano-TaC.

[0149] Comparative Example 12

[0150] The difference from Example 3 is that no boron nitride whiskers or vanadium carbide powder is added in the preparation of the whiskers and the auxiliary solution.

[0151] Comparative Example 13

[0152] The difference from Example 3 is that no sodium carboxymethyl cellulose solution is added in the preparation of the whisker and coordination solution.

[0153] The products of Examples 1-3 and Comparative Examples 1-13 were tested for wear resistance (using a wear tester with a load of 20 N, a wear rate of 15 m / min, and a wear time of 100 min), yield strength, and fatigue resistance under conventional conditions. They were also placed in 5% sodium chloride salt spray for 24 h and 8% sodium chloride salt spray for 24 h, respectively, to test their wear resistance, yield strength, and fatigue resistance under different degrees of salt corrosion. The performance measurement results are as follows:

[0154]

[0155] From Examples 1-3 and Comparative Examples 1-13, it can be concluded 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. At the same time, it still has excellent performance stability under different degrees of salt corrosion conditions;

[0156] From Comparative Examples 1-13 and Example 3, it can be seen that when the modified nano-titanium nitride agent, the doped nano-TaC agent, and the synergist are not added to the product, the performance of the product deteriorates significantly; when the two agents are coordinated and synergistic, the product performance is significant.

[0157] The performance of the products showed varying degrees of deterioration when the modified nano-titanium nitride agent was not prepared with a modified nano-titanium nitride modifying liquid, when pretreated nano-titanium nitride was not added to the modified nano-titanium nitride modifying liquid, when nano-boron oxide and silicon carbide fiber were not added to the modified nano-titanium nitride modifying liquid, when an additive was not added to the modified nano-titanium nitride agent, when chromium carbide and nano-strontium titanate were not added to the additive, and when carbon nanotubes and urea solution were not added to the additive.

[0158] The modified nano-titanium nitride modified liquid prepared by the modified liquid obtained by the specific method of the present invention and the modified nano-titanium nitride agent prepared by the coordinated combination of the additive obtained by the specific method of the present invention have the most significant performance effect. The effects of other methods are not as obvious as those of the present invention.

[0159] When no heat-treated nano-TaC powder is added in the preparation of the nano-TaC doped synergist, when no whisker synergist liquid is added in the preparation of the nano-TaC doped synergist, when no boron nitride whiskers or vanadium carbide powder is added in the preparation of the whisker synergist liquid, and when no sodium carboxymethyl cellulose liquid is added in the preparation of the whisker synergist liquid, the performance of the products tends to deteriorate. The performance effect of the product is most significant when the nano-TaC doped synergist is prepared by combining the whisker synergist liquid obtained by the specific method of the present invention with the heat-treated nano-TaC powder.

[0160] 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 embodied 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 illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0161] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods 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 synergist; 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 blended and added to 5 to 8 parts by weight of sodium carboxymethyl cellulose solution, and stirred thoroughly to obtain a whisker and synergistic solution; The sodium carboxymethyl cellulose solution is prepared by fully blending 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.

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

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. After the irradiation is completed, irradiated nano-titanium nitride is obtained; 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: Silane coupling agent KH550, sodium silicate aqueous solution and ethanol solvent are stirred in a weight ratio of (2-4): (3-5): 7 to obtain a silane solution; 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 solution and stir thoroughly to obtain a modified solution; S03: ultrasonically modifying the pretreated nano-titanium nitride and the modified solution in a weight ratio of 3:5, and obtaining a modified solution of nano-titanium nitride after the ultrasonic modification is completed; S04: The modified solution of nano titanium nitride and the additive are mixed in a weight ratio of 5:4 and ball-milled at a ball-milling speed of 1000-1500 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.

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 performed 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. 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 dodecylbenzenesulfonate solution are evenly blended, and then 2-3 parts by weight of carbon nanotubes and 1-2 parts by weight of urea solution are added and blended fully, 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 dodecylbenzenesulfonate 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 mass fraction of the lanthanum chloride solution is 4-6%.

8. The method for preparing the anti-wear nano composite material according to any one of claims 1 to 7, 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.

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

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