Nano repair material for ship remanufacturing as well as preparation method and application of nano repair material

Abstract

The invention relates to the technical field of nano repair materials, in particular to a ship remanufacturing nano repair material and a preparation method and application thereof, and the nano repair material comprises the following raw materials in parts by weight: 30-35 parts of nano tungsten carbide, 25-30 parts of nano titanium carbide, 25-30 parts of nano silicon carbide, 10-15 parts of modified boron nitride powder and 6-9 parts of a carbon nanotube doping-based additive. According to the nano repairing material, nano tungsten carbide, nano titanium carbide and nano silicon carbide are blended to serve as a base body, meanwhile, the added modified boron nitride powder and the added carbon nano tube doped increasing agent are mutually blended, matched, optimized and improved, and the obtained nano repairing material product has excellent wear resistance, impact resistance and pollution resistance; the performance of the product can be harmoniously improved, and the heat-resistant, corrosion-resistant and stable effects of the product are remarkable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nanorepair materials, in particular to a ship remanufacturing nanorepair material and a preparation method and application thereof. BACKGROUND

[0002] In recent years, the application of nanomaterials in ship repair has gradually attracted attention. Although the existing nanorepair materials can achieve repair effects in ship manufacturing, the repaired material structure has poor wear resistance and impact resistance, and the product structure has poor stain resistance, making it difficult to achieve coordinated improvement in wear resistance, impact resistance and stain resistance. In addition, the product has poor heat resistance and corrosion resistance, which limits the use efficiency of the product. Therefore, the present application needs to be further improved. SUMMARY

[0003] In view of the defects of the prior art, the present application aims to provide a ship remanufacturing nanorepair material and a preparation method and application thereof to solve the problems raised in the background art.

[0004] The technical problem solved by the present application is solved by the following technical scheme: The present application provides a ship remanufacturing nanorepair material, which comprises the following raw materials by weight: 30-35 parts of nanometer tungsten carbide, 25-30 parts of nanometer titanium carbide, 25-30 parts of nanometer silicon carbide, 10-15 parts of modified boron nitride powder, and 6-9 parts of a compatibilizer based on carbon nanotube doping.

[0005] Preferably, the particle size of the nanometer tungsten carbide is 10-15 nm; the particle size of the nanometer titanium carbide is 8-12 nm; and the particle size of the nanometer silicon carbide is 5-8 nm.

[0006] Preferably, the preparation method of the modified boron nitride powder is as follows: S1: uniformly stir the boron nitride in a sufficient amount of a 5-8% by mass potassium permanganate solution, then wash with water, filter and dry; The dried boron nitride is then heat treated at 210-230℃ for 1-2h, then cooled to 60-65℃ at a rate of 2-5℃ / min, and kept at temperature to obtain pretreated boron nitride; S2: stir and modify the pretreated boron nitride and the modifying liquid at a weight ratio of 3:(5-7), at a stirring speed of 350-400r / min for 1-2h, then filter and dry to obtain the modified boron nitride powder.

[0007] Preferably, the preparation method of the modifying liquid is as follows: uniformly blend 3-5 parts by weight of graphene, 2-4 parts by weight of potassium titanate whiskers, 1-2 parts by weight of zirconium oxide and 5-8 parts by mass of a 4-6% by mass sodium citrate solution to prepare the modifying liquid.

[0008] The modified boron nitride powder is prepared by activating boron nitride in potassium permanganate solution, and then optimizing by heat. The activity of boron nitride is stimulated by continuous heat treatment. The performance coordination and stability of the product are further enhanced in the system by stirring the modified liquid to improve the modified boron nitride powder.

[0009] Preferably, the preparation method of the carbon nanotube doped adhesion promoter is: S01: uniformly disperse the carbon nanotubes in 11-15 times the weight of the total weight of the carbon nanotubes in water, then add 10-15% of the total weight of the carbon nanotubes of silane coupling agent KH550, stir uniformly, then filter and dry to obtain silane modified carbon nanotubes; S02: uniformly blend 3-5 parts by weight of nano cobalt powder, 2-3 parts by weight of lanthanum oxide, and 1-2 parts by weight of barium nitrate solution, and 5-8 parts by weight of sodium dodecylbenzenesulfonate solution to obtain a doping liquid; The silane modified carbon nanotubes and the doping liquid are uniformly blended and stirred in a weight ratio of 5:(7-9) to obtain a carbon nanotube doped modified liquid; S03: preparation of adhesion material; S04: blend and ball mill the carbon nanotube doped modified liquid and the adhesion material in a weight ratio of (7-9):5, with a ball milling speed of 1000-1500 r / min for 1-2 h. After ball milling, filter and dry to obtain the carbon nanotube doped adhesion promoter.

[0010] Preferably, the mass fraction of the barium nitrate solution is 2-5%, and the mass fraction of the sodium dodecylbenzenesulfonate solution is 5-8%.

[0011] Preferably, the preparation method of the adhesion material is: S03a: blend and sinter nano Si powder, nano Y powder and Ta powder in a weight ratio of (4-5):(2-3):1 at a sintering temperature of 210-220℃ for 1-1.5 h to obtain a sintered body; S03b: place the magnesium oxide in a urea solution that is 5-8 times the total amount of magnesium oxide, then add 5-8% of the total amount of magnesium oxide of nano silicon sol, and stir uniformly to obtain a magnesium oxide liquid; Stir the sintered body and the magnesium oxide liquid thoroughly in a weight ratio of 4:(5-7), and finally filter and dry to obtain the adhesion material.

[0012] The carbon nanotube is modified by silane coupling agent KH550 to optimize the interface effect, and is further mixed with a doping liquid to optimize the mutual matching of the doping liquid, the nanometer cobalt powder, the lanthanum oxide and the barium nitrate solution and the sodium dodecyl benzene sulfonate solution are matched to enhance the performance of the system, and the high surface area structure of the carbon nanotube can better bear the structure of the doping liquid system, thereby better matching the additive, the nanometer Si powder, the nanometer Y powder and the Ta powder in the additive are used as the base material, and the additive is sintered and matched with the magnesium oxide through the urea solution and the nanometer silicon sol to activate the structure and better strengthen the grain, thereby enhancing the performance of the system and optimizing the performance stability of the product.

[0013] Preferably, the mass fraction of the urea solution is 2-5%.

[0014] The application further provides a preparation method of the ship remanufacturing nanorepair material. The raw materials are weighed, wet ball milled, and dried to obtain the repair material, and the repair material is deposited on the position to be repaired by laser deposition technology, i.e., the laser power of the laser deposition technology is 800-900 W, and the scanning speed is 4-6 mm / s.

[0015] The application further provides an application of the ship remanufacturing nanorepair material in ship repair.

[0016] Compared with the prior art, the application has the following beneficial effects: The nanorepair material is mixed with nanometer tungsten carbide, nanometer titanium carbide and nanometer silicon carbide as the base material, and is further mixed with modified boron nitride powder and additive based on carbon nanotube doping to optimize and improve the product, so that the nanorepair material product has excellent wear resistance, impact resistance and stain resistance, the performance of the product can be improved in a coordinated manner, and the heat resistance, corrosion resistance and stability of the product are significantly improved. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be described clearly and completely below with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0018] The ship remanufacturing nanorepair material in the embodiment includes the following raw materials by weight: Nano tungsten carbide 30~35 parts, nano titanium carbide 25~30 parts, nano silicon carbide 25~30 parts, modified boron nitride powder 10~15 parts, and 6~9 parts of the additive based on carbon nanotube doping.

[0019] The particle size of the nano tungsten carbide is 10~15 nm; the particle size of the nano titanium carbide is 8~12 nm; and the particle size of the nano silicon carbide is 5~8 nm.

[0020] The preparation method of the modified boron nitride powder in the embodiment is as follows: S1: uniformly stirring boron nitride in a sufficient amount of a 5~8% mass fraction potassium permanganate solution, then washing with water, filtering, and drying; The dried boron nitride is then heat treated at 210~230℃ for 1~2h, and then cooled to 60~65℃ at a rate of 2~5℃ / min, and then kept at the temperature to obtain pretreated boron nitride; S2: stirring and modifying the pretreated boron nitride and the modifying solution at a weight ratio of 3: (5~7) at a stirring speed of 350~400r / min for 1~2h, then filtering and drying to obtain the modified boron nitride powder.

[0021] The preparation method of the modifying solution in the embodiment is as follows: uniformly blending 3~5 parts by weight of graphene, 2~4 parts by weight of potassium titanate whiskers, 1~2 parts by weight of zirconium oxide, and 5~8 parts of a 4~6% mass fraction sodium citrate solution to obtain the modifying solution.

[0022] The preparation method of the additive based on carbon nanotube doping in the embodiment is as follows: S01: uniformly dispersing carbon nanotubes in water at 11~15 times the weight of the total carbon nanotubes, then adding 10~15% of the total weight of the carbon nanotubes of silane coupling agent KH550, uniformly stirring, then filtering and drying to obtain silane-modified carbon nanotubes; S02: uniformly blending 3~5 parts by weight of nano cobalt powder, 2~3 parts by weight of lanthanum oxide, 1~2 parts by weight of barium nitrate solution, and 5~8 parts by weight of dodecylbenzenesulfonic acid sodium solution to obtain a doping solution; The silane-modified carbon nanotubes and the doping solution are uniformly blended at a weight ratio of 5: (7~9) to obtain a modified solution based on carbon nanotube doping; S03: preparation of the additive; S04: blending and ball milling the modified solution based on carbon nanotube doping and the additive at a weight ratio of (7~9):5 at a ball milling speed of 1000~1500r / min for 1~2h, then filtering and drying to obtain the additive based on carbon nanotube doping.

[0023] The mass fraction of the barium nitrate solution is 2~5%, and the mass fraction of the dodecylbenzenesulfonic acid sodium solution is 5~8%.

[0024] The preparation method of the additive material of the embodiment is as follows: S03a: Nanometer Si powder, nanometer Y powder and Ta powder are blended and sintered at a weight ratio of (4-5):(2-3):1 for 1-1.5 h, and the sintering temperature is 210-220℃, to obtain a sintered body; S03b: Magnesium oxide is placed in a urea solution with a total amount of 5-8 times of the magnesium oxide, and then 5-8% of the total amount of the magnesium oxide is added to the solution in the form of nanometer silicon sol, and the mixture is stirred uniformly to obtain a magnesium oxide solution; The sintered body and the magnesium oxide solution are stirred at a weight ratio of 4:(5-7), and then filtered and dried to obtain the additive material.

[0025] The mass fraction of the urea solution of the embodiment is 2-5%.

[0026] The preparation method of the ship remanufacturing nanorepair material of the embodiment comprises the following steps: The raw materials are weighed by weight parts, wet ball milled, and then dried to obtain the repair material. The repair material is deposited on the position to be repaired by laser deposition technology, and the laser power of the laser deposition technology is 800-900W and the scanning speed is 4-6mm / s.

[0027] The application of the ship remanufacturing nanorepair material of the embodiment in ship repair.

[0028] Embodiment 1 The ship remanufacturing nanorepair material of the embodiment comprises the following raw materials by weight: 30 parts of nanometer tungsten carbide, 25 parts of nanometer titanium carbide, 25 parts of nanometer silicon carbide, 10 parts of modified boron nitride powder, and 6 parts of additive based on carbon nanotube doping.

[0029] The particle size of the nanometer tungsten carbide of the embodiment is 10nm; the particle size of the nanometer titanium carbide is 8nm; and the particle size of the nanometer silicon carbide is 5nm.

[0030] The preparation method of the modified boron nitride powder of the embodiment is as follows: S1: The boron nitride is stirred in a sufficient amount of a 5% potassium permanganate solution, and then washed with water, filtered and dried; The dried boron nitride is heat treated at 210℃ for 1h, and then cooled to 60℃ at a rate of 2℃ / min, and then kept at 60℃ to obtain pretreated boron nitride; S2: The pretreated boron nitride and the modification liquid are stirred and modified at a weight ratio of 3:5, the stirring speed is 350r / min, and the stirring time is 1h. After stirring, the mixture is filtered and dried to obtain the modified boron nitride powder.

[0031] The preparation method of the modified liquid of the embodiment is that 3 parts by weight of graphene, 2 parts by weight of potassium titanate whisker and 1 part by weight of zirconium oxide and 5 parts by mass fraction of 4% sodium citrate solution are uniformly blended to prepare the modified liquid.

[0032] The preparation method of the carbon nanotube doped based on the additive of the embodiment is that: S01: uniformly disperse the carbon nanotube in 11 times by weight of water of the total weight of the carbon nanotube, then add 10% of the total weight of the carbon nanotube of silane coupling agent KH550, stir uniformly, then filter and dry to obtain the silane modified carbon nanotube; S02: uniformly blend 3 parts by weight of nano cobalt powder, 2 parts by weight of lanthanum oxide and 1 part by weight of barium nitrate solution and 5 parts by weight of dodecylbenzenesulfonic acid sodium solution to obtain a doping liquid; The silane modified carbon nanotube and the doping liquid are uniformly blended and stirred according to a weight ratio of 5:7 to obtain a carbon nanotube doped modified liquid; S03: preparation of the additive; S04: blend the carbon nanotube doped modified liquid and the additive according to a weight ratio of 7:5 for ball milling treatment, the ball milling speed is 1000 r / min, the ball milling time is 1 h, after the ball milling, filter and dry to obtain the carbon nanotube doped based on the additive.

[0033] The mass fraction of the barium nitrate solution of the embodiment is 2%; the mass fraction of the dodecylbenzenesulfonic acid sodium solution is 5%.

[0034] The preparation method of the additive of the embodiment is that: S03a: blend and sinter nano Si powder, nano Y powder and Ta powder according to a weight ratio of 4:2:1 for 1 h, the sintering temperature is 210°C, after the sintering, obtain a sintered body; S03b: put the magnesium oxide in 5 times of the total amount of the magnesium oxide of urea solution, then add 5% of the total amount of the magnesium oxide of nano silicon sol, stir uniformly to obtain a magnesium oxide liquid; Blend and stir the sintered body and the magnesium oxide liquid according to a weight ratio of 4:5, finally filter and dry to obtain the additive.

[0035] The mass fraction of the urea solution of the embodiment is 2%.

[0036] The preparation method of the ship remanufacturing nano repair material of the embodiment comprises the following steps: Weigh the raw materials by weight parts, wet ball mill the raw materials sufficiently, then dry to obtain the repair material, deposit the repair material to the position to be repaired by laser deposition technology, the laser power of the laser deposition technology is 800 W, and the scanning speed is 4 mm / s.

[0037] The application of the ship remanufacturing nano repair material of the embodiment in ship repair.

[0038] Embodiment 2 A ship remanufacturing nanorepair material of the embodiment comprises the following raw materials in parts by weight: 35 parts of nanometer tungsten carbide, 30 parts of nanometer titanium carbide, 30 parts of nanometer silicon carbide, 15 parts of modified boron nitride powder, and 9 parts of carbon nanotube doped compatibilizer.

[0039] The particle size of the nanometer tungsten carbide is 15 nm; the particle size of the nanometer titanium carbide is 12 nm; and the particle size of the nanometer silicon carbide is 8 nm.

[0040] The preparation method of the modified boron nitride powder of the embodiment is as follows: S1: uniformly stir the boron nitride in a sufficient amount of 8% mass fraction potassium permanganate solution, then wash with water, filter and dry; The dried boron nitride is then heat treated at 230°C for 2h, then cooled to 65°C at a rate of 5°C / min, and then incubated to obtain pretreated boron nitride; S2: stir and modify the pretreated boron nitride and the modifying solution at a weight ratio of 3:7, at a stirring speed of 400r / min for 2h, then filter and dry to obtain modified boron nitride powder.

[0041] The preparation method of the modifying solution of the embodiment is as follows: uniformly blend 5 parts by weight of graphene, 4 parts by weight of potassium titanate whisker, 2 parts by weight of zirconium oxide, and 8 parts of 6% mass fraction sodium citrate solution to prepare the modifying solution.

[0042] The preparation method of the carbon nanotube doped compatibilizer of the embodiment is as follows: S01: uniformly disperse the carbon nanotubes in 15 times the total weight of the carbon nanotubes of water, then add 15% of the total weight of the carbon nanotubes of silane coupling agent KH550, stir uniformly, then filter and dry to obtain silane modified carbon nanotubes; S02: uniformly blend 5 parts by weight of nanometer cobalt powder, 3 parts by weight of lanthanum oxide, and 2 parts by weight of barium nitrate solution, and 8 parts of dodecylbenzenesulfonic acid sodium solution to obtain a doping solution; Uniformly blend and stir the silane modified carbon nanotubes and the doping solution at a weight ratio of 5:9 to obtain a carbon nanotube doped modifying solution; S03: preparation of the compatibilizer; S04: blend the carbon nanotube doped modifying solution and the compatibilizer at a weight ratio of 9:5, and perform ball milling treatment at a ball milling speed of 1500r / min for 2h, then filter and dry to obtain the carbon nanotube doped compatibilizer.

[0043] The mass fraction of the barium nitrate solution is 5%; and the mass fraction of the dodecylbenzenesulfonic acid sodium solution is 8%.

[0044] The preparation method of the additive material of the embodiment is as follows: S03a: Nanometer Si powder, nanometer Y powder and Ta powder are blended according to a weight ratio of 5:3:1 and sintered for 1-1.5h, and the sintering temperature is 220℃. After sintering, a sintered body is obtained; S03b: Magnesium oxide is placed in a urea solution with a total amount of 8 times of magnesium oxide, and then 8% of the total amount of magnesium oxide is added to the solution in the form of nanometer silicon sol, and stirred uniformly to obtain a magnesium oxide solution; The sintered body and the magnesium oxide solution are stirred according to a weight ratio of 4:7, and finally filtered and dried to obtain the additive material.

[0045] The mass fraction of the urea solution of the embodiment is 5%.

[0046] The preparation method of the ship remanufacturing nanorepair material of the embodiment comprises the following steps: The raw materials are weighed according to the weight parts, wet ball-milled sufficiently, and then dried to obtain the repair material. The repair material is deposited on the position to be repaired by laser deposition technology, and the laser power of the laser deposition technology is 900W and the scanning speed is 6mm / s.

[0047] The application of the ship remanufacturing nanorepair material of the embodiment in ship repair.

[0048] Embodiment 3 The ship remanufacturing nanorepair material of the embodiment comprises the following raw materials by weight: 32.5 parts of nanometer tungsten carbide, 27.5 parts of nanometer titanium carbide, 27.5 parts of nanometer silicon carbide, 12.5 parts of modified boron nitride powder, and 7.5 parts of additive based on carbon nanotube doping.

[0049] The particle size of the nanometer tungsten carbide of the embodiment is 12.5nm; the particle size of the nanometer titanium carbide is 10nm; and the particle size of the nanometer silicon carbide is 6.5nm.

[0050] The preparation method of the modified boron nitride powder of the embodiment is as follows: S1: The boron nitride is stirred uniformly in a sufficient amount of 6.5% potassium permanganate solution, and then washed with water, filtered and dried; The dried boron nitride is heat treated at 220℃ for 1.5h, and then cooled to 62.5℃ at a rate of 3.5℃ / min, and then kept at this temperature to obtain pretreated boron nitride; S2: The pretreated boron nitride and the modification liquid are stirred and modified according to a weight ratio of 3:6, the stirring speed is 370r / min, and the stirring time is 1.5h. After stirring, the mixture is filtered and dried to obtain modified boron nitride powder.

[0051] The preparation method of the modified liquid of the embodiment is that 4 parts by weight of graphene, 3 parts by weight of potassium titanate whisker and 1.5 parts by weight of zirconium oxide and 6.5 parts of 5% mass fraction sodium citrate solution are uniformly blended to prepare the modified liquid.

[0052] The preparation method of the carbon nanotube doped based on the reinforcing agent of the embodiment is that: S01: uniformly disperse the carbon nanotube in 13 times by weight of water of the total weight of the carbon nanotube, then add 12.5% of the total weight of the carbon nanotube of silane coupling agent KH550, stir uniformly, then filter and dry to obtain the silane modified carbon nanotube; S02: uniformly blend 4 parts by weight of nano cobalt powder, 2.5 parts by weight of lanthanum oxide and 1.5 parts by weight of barium nitrate solution and 6.5 parts of dodecylbenzenesulfonic acid sodium solution to obtain the doping liquid; The silane modified carbon nanotube and the doping liquid are uniformly blended and stirred according to the weight ratio of 5:8 to obtain the carbon nanotube doped modified liquid; S03: preparation of the reinforcing agent; S04: blend the carbon nanotube doped modified liquid and the reinforcing agent according to the weight ratio of 8:5, ball mill, the ball milling speed is 1250r / min, ball mill for 1.5h, after the ball milling, filter and dry to obtain the carbon nanotube doped based on the reinforcing agent.

[0053] The mass fraction of the barium nitrate solution of the embodiment is 3.5%; the mass fraction of the dodecylbenzenesulfonic acid sodium solution is 6.5%.

[0054] The preparation method of the reinforcing agent of the embodiment is that: S03a: blend and sinter the nano Si powder, the nano Y powder and the Ta powder according to the weight ratio of 4.5:2.5:1, the sintering temperature is 215℃, after the sintering, obtain the sintered body; S03b: put the magnesium oxide in the urea solution of 6.5 times of the total amount of the magnesium oxide, then add the nano silicon sol of 6.5% of the total amount of the magnesium oxide, stir uniformly to obtain the magnesium oxide liquid; Blend the sintered body and the magnesium oxide liquid according to the weight ratio of 4:6, finally filter and dry to obtain the reinforcing agent.

[0055] The mass fraction of the urea solution of the embodiment is 3.5%.

[0056] The preparation method of the ship remanufacturing nano repair material of the embodiment comprises the following steps: Weigh the raw materials according to the weight parts, wet ball mill the raw materials sufficiently, then dry to obtain the repair material, deposit the repair material to the position to be repaired by the laser deposition technology, the laser power of the laser deposition technology is 850W, and the scanning speed is 5mm / s.

[0057] The application of the ship remanufacturing nanorepair material in the ship repair.

[0058] Comparative example 1 Different from example 3 is that the modified boron nitride powder is not added.

[0059] Comparative example 2 Different from example 3 is that the modified liquid is not added in the preparation of the modified boron nitride powder.

[0060] Comparative example 3 Different from example 3 is that the graphene and potassium titanate whisker are not added in the modified liquid.

[0061] Comparative example 4 Different from example 3 is that the carbon nanotube doped reinforcing agent is not added.

[0062] Comparative example 5 Different from example 3 is that the carbon nanotube doped modified liquid is not added in the preparation of the carbon nanotube doped reinforcing agent.

[0063] Comparative example 6 Different from example 3 is that the doping liquid is not added in the preparation of the carbon nanotube doped modified liquid.

[0064] Comparative example 7 Different from example 3 is that the nano cobalt powder and lanthanum oxide are not added in the doping liquid.

[0065] Comparative example 8 Different from example 3 is that the reinforcing material is not added in the preparation of the carbon nanotube doped reinforcing agent.

[0066] Comparative example 9 Different from example 3 is that the sintered body is not added in the reinforcing material.

[0067] Comparative example 10 Different from example 3 is that the nano Si powder and nano Y powder are not added in the sintered body.

[0068] Comparative example 11 Different from example 3 is that the magnesium oxide liquid is not added in the reinforcing material.

[0069] The repair material is deposited on the to-be-repaired position by laser deposition technology, and then the wear resistance, impact resistance and stain resistance of examples 1-3 and comparative examples 1-11 are tested, and the heat resistance and corrosion resistance of the product are tested (the to-be-repaired position is placed under 5% sodium chloride salt spray for 48h, and then placed at 65℃ for 24h, which is one cycle, and the cycle is 10 times);

[0070] As can be seen from comparative examples 1-11 and examples 1-3; The product of Example 3 has excellent wear resistance, impact resistance and stain resistance, the minimum wear resistance under normal conditions can reach 0.5*10 mm / N.m, the Charpy impact absorption can be as high as 17.2 J, and the stain resistance grade can reach 5 levels; The minimum wear resistance under heat-resistant and corrosion-resistant conditions can reach 0.9*10 mm / N.m, the Charpy impact absorption can be as high as 16.8, and the stain resistance grade can reach 5 levels; the wear resistance, impact resistance and stain resistance can be improved in coordination, and the product has excellent performance stability under heat-resistant and corrosion-resistant conditions; As seen from Comparative Examples 1-11 and Example 3, the performance of the product is significantly deteriorated without adding one of the modified boron nitride powder and the compatibilizer based on carbon nanotube doping; the performance of the product is most significant when the modified boron nitride powder and the compatibilizer based on carbon nanotube doping are used in coordination and together. The performance of the product has a deteriorating trend when no modified liquid is added in the preparation of the modified boron nitride powder, no graphene or potassium titanate whisker is added in the modified liquid, and the performance of the product is most significant when the modified liquid is obtained by the specific method of the application. The performance of the product has a deteriorating trend when no carbon nanotube doping modified liquid is added in the preparation of the compatibilizer based on carbon nanotube doping, no doping liquid is added in the preparation of the carbon nanotube doping modified liquid, no nano cobalt powder or lanthanum oxide is added in the doping liquid, no compatibilizing material is added in the preparation of the compatibilizer based on carbon nanotube doping, no sintered body is added in the compatibilizing material, no nano Si powder or nano Y powder is added in the sintered body, and no magnesium oxide liquid is added in the compatibilizing material. The performance of the product is significantly deteriorated when no carbon nanotube doping modified liquid and no compatibilizing material are added in the preparation of the compatibilizer based on carbon nanotube doping, and the performance of the product is most significant when the doping liquid is obtained by the specific method of the application and the compatibilizing material is obtained by the specific process, and the effect of the application is not as obvious as the other process methods.

[0071] It is apparent for those skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the claims are intended to be embraced in the application.

[0072] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A nano-repair material for ship remanufacturing, characterized in that: The nano-repair material comprises the following raw materials in parts by weight: 30-35 parts of nano-tungsten carbide, 25-30 parts of nano-titanium carbide, 25-30 parts of nano-silicon carbide, 10-15 parts of modified boron nitride powder, and 6-9 parts of carbon nanotube-doped enhancer.

2. The nano-repair material for ship remanufacturing according to claim 1, characterized in that: The particle size of the nano-tungsten carbide is 10-15 nm; the particle size of the nano-titanium carbide is 8-12 nm; and the particle size of the nano-silicon carbide is 5-8 nm.

3. The nano-repair material for ship remanufacturing according to claim 1, characterized in that: The preparation method of the modified boron nitride powder is: S1: Stir the boron nitride evenly in a sufficient amount of 5-8% potassium permanganate solution, then wash with water, filter and dry; The dried boron nitride is further heat-treated at 210-230°C for 1-2 hours, then cooled to 60-65°C at a rate of 2-5°C / min and kept warm to obtain pretreated boron nitride; S2: The pretreated boron nitride and the modified liquid are stirred and modified in a weight ratio of 3:(5-7) at a stirring speed of 350-400 r / min for 1-2 hours. After the stirring is completed, the modified boron nitride powder is filtered and dried to obtain the modified boron nitride powder.

4. The nano-repair material for ship remanufacturing according to claim 3, characterized in that: The preparation method of the modified liquid is as follows: 3-5 parts by weight of graphene, 2-4 parts by weight of potassium titanate whiskers, 1-2 parts by weight of zirconium oxide and 5-8 parts by weight of 4-6% sodium citrate solution are uniformly blended to prepare the modified liquid.

5. The nano-repair material for ship remanufacturing according to claim 1, characterized in that: The preparation method of the carbon nanotube-doped enhancer is as follows: S01: evenly dispersing carbon nanotubes in water at a concentration of 11 to 15 times the total weight of the carbon nanotubes, then adding 10 to 15% of the total weight of the carbon nanotubes as a silane coupling agent KH550, stirring evenly, and then filtering and drying to obtain silane-modified carbon nanotubes; S02: 3-5 parts by weight of nano-cobalt powder, 2-3 parts by weight of lanthanum oxide, 1-2 parts by weight of barium nitrate solution, and 5-8 parts by weight of sodium dodecylbenzenesulfonate solution are uniformly mixed to obtain a doping solution; Silane-modified carbon nanotubes and doping liquid are mixed and stirred uniformly in a weight ratio of 5:(7-9) to obtain a carbon nanotube-doped modified liquid; S03: Preparation of additives; S04: The carbon nanotube-doped modifying liquid and the additive are mixed and ball-milled in a weight ratio of (7-9):5 at a ball-milling speed of 1000-1500 r / min for 1-2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain an additive doped with carbon nanotubes.

6. The nano-repair material for ship remanufacturing according to claim 5, characterized in that: The mass fraction of the barium nitrate solution is 2-5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 5-8%.

7. The nano-repair material for ship remanufacturing according to claim 5, characterized in that: The preparation method of the augmentation material is: S03a: Nano-Si powder, nano-Y powder and Ta powder are mixed in a weight ratio of (4-5): (2-3): 1 and sintered for 1-1.5 hours at a sintering temperature of 210-220°C. After sintering, a sintered body is obtained. S03b: placing magnesium oxide in a urea solution that is 5 to 8 times the total amount of magnesium oxide, then adding nano-silica sol that is 5 to 8% of the total amount of magnesium oxide, and stirring evenly to obtain magnesium oxide liquid; The sintered body and magnesium oxide liquid are fully stirred in a weight ratio of 4: (5-7), and finally filtered and dried to obtain the additive.

8. The nano-repair material for ship remanufacturing according to claim 7, characterized in that: The mass fraction of urea solution is 2~5%.

9. The method for preparing a nano-repair material for ship remanufacturing according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw materials are weighed according to weight, wet-milled and dried to obtain the repair material, and then deposited onto the position to be repaired by laser deposition technology. The laser power of the laser deposition technology is 800~900W, and the scanning speed is 4~6mm / s.

10. Use of the ship remanufacturing nano-repair material according to any one of claims 1 to 8 in ship repair.

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