A high wear-resistant alloy material and its application in throat-type nozzles

Abstract

This invention relates to the field of alloy materials technology, specifically to a high wear-resistant alloy material and its application in throat-type nozzles. The invention involves compounding WC powder, Co powder, Cu powder, and Cr3C2 powder to obtain a mixture; uniformly mixing mercapto-containing organosilicon, epoxy-containing organosilicon-modified polyester, and xylene to obtain a modifier, which is then used to modify the mixture to obtain mixture A; further, surface modification of the mixture is performed using 3-aminopropyltrimethoxysilane to obtain mixture B; mixture A, mixture B, and a binder are then kneaded, granulated, and injection molded to obtain a preform; the preform is degreased and then sintered to obtain the high wear-resistant alloy material. The high wear-resistant alloy material prepared by this invention exhibits excellent mechanical properties and wear resistance.

Description

Technical Field

[0001] This invention relates to the field of alloy materials technology, specifically to a high wear-resistant alloy material and its application in throat-type nozzles. Background Technology

[0002] With the continuous advancement of industrial technology and the increasing demand for high-performance materials, nozzles are becoming increasingly widely used in many high-temperature, high-pressure, and corrosive environments. Throat nozzles, as important components in fluid dynamics, are widely used in aerospace, chemical, and gas turbine industries. To meet the high material performance requirements of these applications, researchers have begun to focus on the development and application of high-wear-resistant alloy materials.

[0003] However, traditional nozzle materials are prone to wear, deformation, and fatigue under high temperature and high pressure environments, resulting in a significantly shortened nozzle lifespan. This not only increases maintenance costs but also affects the efficiency and safety of the entire system. In terms of materials, the binders used in many nozzle alloys (such as Ni) can increase the material's brittleness under certain conditions, reducing the overall mechanical properties of the nozzle, especially under impact or fatigue loads. Furthermore, poor compatibility between different material components can cause the mixed metal powders to separate during molding and sintering, thus affecting the material's density and performance.

[0004] Therefore, we propose a high wear-resistant alloy material and its application in throat-type nozzles. Summary of the Invention

[0005] To reduce the waste of transfer metal foil in the current composite current collector transfer welding process, this invention proposes a welding method that only requires welding metal foil on one side. Compared with welding metal foil on both sides, this welding process is more convenient and has lower overcurrent resistance compared with transfer welding without using metal foil.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A method for preparing a high wear-resistant alloy material includes the following steps:

[0008] Step S1: Add WC powder, Co powder, Cu powder, Cr3C2 powder and anhydrous ethanol into a wet mill for ball milling, remove and dry to obtain a mixture;

[0009] Step S2: Mix mercapto-containing organosilicon, epoxy-containing organosilicon modified polyester and xylene evenly to obtain a modifier; mix the mixture and the modifier, ultrasonically disperse for 30-50 min, stir at 120-130℃ for 1-2 h, and after filtration, washing and drying, obtain mixture A;

[0010] Step S3: The mixture is ultrasonically dispersed in a mixed solution of anhydrous ethanol, deionized water and 3-aminopropyltrimethoxysilane, and reacted at 70-80℃ for 1-3 hours. After centrifugation, washing and drying, mixture B is obtained.

[0011] Step S4: Mixture A, mixture B and binder are kneaded and granulated to obtain feedstock; feedstock is injection molded to obtain green body; green body is degreased and then sintered to obtain high wear-resistant alloy material.

[0012] Further, in step S1, the mixture comprises the following components by mass percentage: Co: 3-6%, Cu: 1-2%, Cr3C2: 2-4%, with the balance being WC.

[0013] Furthermore, in step S1, the amount of anhydrous ethanol added is 15-25% of the total mass of WC powder, Co powder, Cu powder, and Cr3C2 powder.

[0014] Furthermore, in step S1, the ball milling process conditions are: ball-to-material ratio of 3-5:1, ball milling speed of 45-55 r / min, and ball milling time of 35-45 h.

[0015] Further, in step S2, the mass ratio of mercapto-containing organosilicon, epoxy-containing organosilicon modified polyester and xylene is 1:(4-5):(10-12).

[0016] Furthermore, in step S2, the mass ratio of the mixture to the modifier is 1:(10-12).

[0017] Furthermore, the preparation method of the mercapto-containing organosilicon is as follows:

[0018] Under nitrogen protection, 3-mercaptopropylmethyldimethoxysilane, deionized water and isopropanol were mixed evenly, heated to 60-70℃, hydroxyl silicone oil and tetramethylammonium hydroxide were added and mixed evenly, and the reaction was carried out for 4-6 hours. After vacuum distillation, mercapto-containing organosilicon was obtained.

[0019] Further, the mass ratio of 3-mercaptopropylmethyldimethoxysilane, deionized water, isopropanol, hydroxyl silicone oil and tetramethylammonium hydroxide is 1:(2-3):(7-8):(65-66):(1.2-1.4).

[0020] Furthermore, the preparation method of the epoxy-based organosilicon-modified polyester is as follows:

[0021] Step A: Under nitrogen protection, hydroxyl silicone oil, 3-glycidyl ether propyl methyl diethoxysilane and tetramethyl ammonium hydroxide silanolate are mixed evenly and reacted at 90-100℃ for 5-7 hours. After vacuum distillation, epoxy organosilicon is obtained.

[0022] Step B: Under nitrogen protection, the epoxy-based organosilicon and the dihydroxy-terminated unsaturated polyester are mixed evenly and reacted at 140-160℃ for 3-5 hours. Then, dibutyltin dilaurate is added, and the temperature is raised to 170-180℃ until no water is produced, thus obtaining the epoxy-based organosilicon modified polyester.

[0023] In the above technical solution, epoxy-based organosilicon is prepared by condensing 3-glycidyl etheroxypropylmethyldiethoxysilane with low viscosity hydroxyl silicone oil; then, epoxy-based organosilicon modified polyester is obtained by condensing epoxy-based organosilicon with dihydroxy-terminated unsaturated polyester.

[0024] Further, in step A, the mass ratio of hydroxyl silicone oil to 3-glycidyl etheroxypropylmethyldiethoxysilane is 1:(0.05-0.10).

[0025] Furthermore, the amount of the tetramethylammonium hydroxide silanolyl salt used is 0.015-0.022% of the total mass of hydroxyl silicone oil and 3-glycidyl etheroxypropylmethyldiethoxysilane.

[0026] Further, in step B, the mass ratio of epoxy-based silicone, dihydroxy-terminated unsaturated polyester, and dibutyltin dilaurate is 1:(4-6):(0.03-0.05).

[0027] Furthermore, the dihydroxy-terminated unsaturated polyester is one or both of hydroxy-terminated polymaleic acid diol ester and hydroxy-terminated polyitacrylic acid diol ester, with a molecular weight of 1000-4000 g / mol.

[0028] Further, in step S3, the mass ratio of the mixture, anhydrous ethanol, deionized water and 3-aminopropyltrimethoxysilane is 1:(10-12):(2-4):(0.1-0.3).

[0029] Furthermore, in step S4, the amount of each component is as follows: by mass percentage, 15-20 wt% of mixture A, 35-45 wt% of mixture B, and the remainder is binder.

[0030] Further, the adhesive comprises the following components in weight percentage: 10-20 wt% ethylene-vinyl acetate copolymer, 10-20 wt% high-density polyethylene, 5-10 wt% polylactide, 3-5% stearic acid, and the remainder being paraffin wax.

[0031] Furthermore, the mixing process conditions are as follows: mixing temperature is 150-160℃, and mixing time is 1-2h.

[0032] Furthermore, the injection molding process conditions are as follows: injection temperature of 140-160℃, injection pressure of 80-120MPa, injection speed of 40-100g / s, and mold temperature of 30-50℃.

[0033] Furthermore, the degreasing includes solvent degreasing and thermal degreasing; the solvent degreasing process is as follows: the solvent is n-heptane, the degreasing time is 6-8 hours, and the temperature is 40-60℃; the thermal degreasing process is as follows: the thermal degreasing temperature is 600-800℃, and the thermal degreasing time is 30-60 minutes.

[0034] Furthermore, the sintering process conditions are as follows: under nitrogen atmosphere protection, heating to 1450-1500℃ at a heating rate of 5-10℃ / min, and sintering time of 12-16h.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] This invention discloses a high wear-resistant alloy material and its application in a throat-shaped nozzle. The mixture is prepared by compounding WC powder, Co powder, Cu powder, and Cr3C2 powder. WC powder acts as a hard phase, providing high hardness and wear resistance. Co powder melts and wets the WC particles during sintering, forming a continuous metal network that enhances the bonding strength between particles and improves the material's impact resistance and toughness. Cu powder fills the pores, increasing the material's density. Cr3C2 powder refines the grains, improving material uniformity and significantly enhancing the alloy's wear resistance and corrosion resistance. The design utilizes a paraffin-based binder system, combining ethylene-vinyl acetate copolymer, high-density polyethylene, polylactide, stearic acid, and paraffin wax as the binder, ultimately resulting in a high wear-resistant alloy material with excellent overall performance.

[0037] Based on the above, this application modifies the surface of the mixture by first using mercapto-containing organosilicon and epoxy-containing organosilicon modified polyester as modifiers to modify the mixture, resulting in mixture A. The epoxy-containing organosilicon modified polyester contains epoxy groups and unsaturated double bonds. The introduction of unsaturated double bonds can effectively improve the compatibility between the compounded powder and the binder. The mercapto groups in the mercapto-containing organosilicon can interact with the metal powder, enhance the interfacial bonding force, reduce particle agglomeration, and improve the modification effect.

[0038] Then, the mixture was modified with 3-aminopropyltrimethoxysilane to obtain mixture B. Amino groups were grafted onto its surface. By utilizing the reaction between amino and epoxy groups, mixture A and mixture B were more tightly bonded, reducing porosity. The binder could be more evenly coated on the surface of the raw material powder, ensuring formability during the production process, reducing porosity, and improving the density of the finished product. This resulted in the final alloy material exhibiting better mechanical properties in applications. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the throat-shaped nozzle in this invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that there are no special restrictions on the suppliers of all raw materials involved in this invention. Exemplary suppliers include: WC powder: particle size 5-10μm, carbon content 6.08-6.18%; Co powder: pure cobalt powder, particle size 3-5μm; Cu powder: pure copper powder, particle size 1-2μm; Cr3C2 powder: particle size 1-2μm, purity 99.9%; hydroxyl silicone oil: model 768543, sourced from Shanghai Maclean.

[0043] In this embodiment, the dihydroxy-terminated unsaturated polyester is hydroxy-terminated polybutylene itaconic acid (PBI), and its specific preparation steps refer to the prior art (Wang Yingying. Synthesis and characterization of polybutylene itaconic acid [D]. Shandong: Qingdao University of Science and Technology, 2013. DOI:10.7666 / d.J0106011.).

[0044] Unless otherwise specified, all the following quantities are parts by weight.

[0045] Example 1: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0046] Step S1: Add WC powder, Co powder, Cu powder, Cr3C2 powder and anhydrous ethanol into a wet mill and ball mill (ball-to-material ratio 3:1, ball milling speed 45 r / min, ball milling time 35 h). Remove and dry to obtain a mixture. The mixture contains the following components by mass percentage: Co: 3%, Cu: 1%, Cr3C2: 1%, with the balance being WC. The amount of anhydrous ethanol added is 15% of the total mass of WC powder, Co powder, Cu powder, and Cr3C2 powder.

[0047] Step S2: Mix 10 parts of mercapto-containing organosilicon, 40 parts of epoxy-based organosilicon modified polyester and 100 parts of xylene evenly to obtain a modifier; mix 15 parts of the mixture and 150 parts of the modifier, ultrasonically disperse for 30 min, stir at 120℃ for 1 h, and after filtration, washing and drying, obtain mixture A;

[0048] Step S3: Disperse 35 parts of the mixture ultrasonically in a mixed solution of 350 parts of anhydrous ethanol, 70 parts of deionized water and 3.5 parts of 3-aminopropyltrimethoxysilane, react at 70°C for 1 hour, and obtain mixture B after centrifugation, washing and drying.

[0049] Step S4: Mixture A, mixture B, and binder are kneaded (kneading temperature 150℃, kneading time 1h) and granulated to obtain a feedstock; the feedstock is then injection molded (injection temperature 140℃, injection pressure 80MPa, injection speed 40g / s, mold temperature 30℃) to obtain a green body; the green body is then degreased (including solvent degreasing and thermal degreasing; the solvent degreasing process is as follows: solvent is n-heptane, degreasing time is 6h, temperature is 40℃; the thermal degreasing process is as follows: thermal degreasing temperature is 6... The material is heated to 1450℃ at 00℃ for 30 min, and then sintered (under nitrogen atmosphere protection, heated to 1450℃ at a heating rate of 5℃ / min for 16 h) to obtain a high wear-resistant alloy material; by mass percentage, 15wt% of mixture A, 35wt% of mixture B, and the remainder is binder; the binder includes the following components by mass percentage: 10wt% ethylene-vinyl acetate copolymer, 10wt% high-density polyethylene, 5wt% polylactide, 3% stearic acid, and the remainder is paraffin wax;

[0050] The preparation method of mercapto-containing organosilicon is as follows:

[0051] Under nitrogen protection, 0.2 parts of 3-mercaptopropylmethyldimethoxysilane, 0.4 parts of deionized water and 1.4 parts of isopropanol were mixed evenly, heated to 60°C, and 13 parts of hydroxyl silicone oil and 0.24 parts of tetramethylammonium hydroxide were added and mixed evenly. The mixture was reacted for 4 hours and then distilled under reduced pressure to obtain mercapto-containing organosilicon.

[0052] The preparation method of epoxy-based organosilicon modified polyester is as follows:

[0053] Step A: Under nitrogen protection, 40 parts of hydroxyl silicone oil, 2 parts of 3-glycidyl etheroxypropylmethyldiethoxysilane, and tetramethylammonium hydroxide silanolate were mixed evenly and reacted at 90°C for 5 hours. After vacuum distillation, epoxy-based organosilicon was obtained. The amount of tetramethylammonium hydroxide silanolate used was 0.015% of the total mass of hydroxyl silicone oil and 3-glycidyl etheroxypropylmethyldiethoxysilane.

[0054] Step B: Under nitrogen protection, 40 parts of epoxy organosilicon and 160 parts of dihydroxy-terminated unsaturated polyester are mixed evenly and reacted at 140°C for 3 hours. Then, 1.2 parts of dibutyltin dilaurate are added, and the temperature is raised to 170°C until no water is produced, thus obtaining epoxy organosilicon modified polyester.

[0055] Example 2: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0056] Step S1: Add WC powder, Co powder, Cu powder, Cr3C2 powder and anhydrous ethanol into a wet mill and ball mill (ball-to-material ratio 4:1, ball milling speed 50 r / min, ball milling time 40 h), remove and dry to obtain a mixture; the mixture includes the following components by mass percentage: Co: 5%, Cu: 1.5%, Cr3C2: 2%, with the balance being WC; the amount of anhydrous ethanol added is 20% of the total mass of WC powder, Co powder, Cu powder, and Cr3C2 powder;

[0057] Step S2: Mix 12 parts of mercapto-containing organosilicon, 54 parts of epoxy-based organosilicon modified polyester and 132 parts of xylene evenly to obtain a modifier; mix 18 parts of the mixture and 198 parts of the modifier, ultrasonically disperse for 40 min, stir at 125℃ for 1.5 h, filter, wash and dry to obtain mixture A;

[0058] Step S3: Disperse 40 parts of the mixture ultrasonically in a mixed solution of 440 parts of anhydrous ethanol, 120 parts of deionized water and 8 parts of 3-aminopropyltrimethoxysilane, react at 75°C for 2 hours, and obtain mixture B after centrifugation, washing and drying.

[0059] Step S4: Mixture A, mixture B, and binder are kneaded (kneading temperature 155℃, kneading time 1.5h) and granulated to obtain a feedstock; the feedstock is then injection molded (injection temperature 145℃, injection pressure 100MPa, injection speed 60g / s, mold temperature 40℃) to obtain a green body; the green body is then degreased (including solvent degreasing and thermal degreasing; the solvent degreasing process is: solvent is n-heptane, degreasing time 7h, temperature 50℃; the thermal degreasing process is: thermal degreasing temperature...). The material is heated to 700℃ and degreased for 50 min, then sintered (under nitrogen atmosphere protection, heated to 1480℃ at a heating rate of 8℃ / min, sintering time for 14 h) to obtain a high wear-resistant alloy material; by mass percentage, 18wt% of mixture A, 40wt% of mixture B, and the remainder is binder; the binder includes the following components by mass percentage: 15wt% ethylene-vinyl acetate copolymer, 15wt% high-density polyethylene, 8wt% polylactide, 4% stearic acid, and the remainder is paraffin wax;

[0060] The preparation method of mercapto-containing organosilicon is as follows:

[0061] Under nitrogen protection, 0.2 parts of 3-mercaptopropylmethyldimethoxysilane, 0.5 parts of deionized water and 1.5 parts of isopropanol were mixed evenly, heated to 65°C, and 13 parts of hydroxyl silicone oil and 0.26 parts of tetramethylammonium hydroxide silanoate were added and mixed evenly. The mixture was reacted for 5 hours and then distilled under reduced pressure to obtain mercapto-containing organosilicon.

[0062] The preparation method of epoxy-based organosilicon modified polyester is as follows:

[0063] Step A: Under nitrogen protection, 12 parts of hydroxyl silicone oil, 0.96 parts of 3-glycidyl etheroxypropylmethyldiethoxysilane, and tetramethylammonium hydroxide silanolate were mixed evenly and reacted at 95°C for 6 hours. After vacuum distillation, epoxy organosilicon was obtained. The amount of tetramethylammonium hydroxide silanolate used was 0.02% of the total mass of hydroxyl silicone oil and 3-glycidyl etheroxypropylmethyldiethoxysilane.

[0064] Step B: Under nitrogen protection, 12 parts of epoxy organosilicon and 60 parts of dihydroxy-terminated unsaturated polyester are mixed evenly and reacted at 150°C for 4 hours. Then, 0.48 parts of dibutyltin dilaurate are added, and the temperature is raised to 175°C until no water is produced, thus obtaining epoxy organosilicon modified polyester.

[0065] Example 3: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0066] Step S1: Add WC powder, Co powder, Cu powder, Cr3C2 powder and anhydrous ethanol into a wet mill and ball mill (ball-to-material ratio of 5:1, ball milling speed of 55 r / min, ball milling time of 45 h), remove and dry to obtain a mixture; the mixture includes the following components by mass percentage: Co: 6%, Cu: 2%, Cr3C2: 3%, with the balance being WC; the amount of anhydrous ethanol added is 25% of the total mass of WC powder, Co powder, Cu powder, and Cr3C2 powder;

[0067] Step S2: Mix 15 parts of mercapto-containing organosilicon, 75 parts of epoxy-based organosilicon modified polyester and 180 parts of xylene evenly to obtain a modifier; mix 20 parts of the mixture and the modifier, ultrasonically disperse for 50 min, stir at 130℃ for 2 h, filter, wash and dry to obtain mixture A;

[0068] Step S3: Disperse 45 parts of the mixture ultrasonically in a mixed solution of 540 parts of anhydrous ethanol, 180 parts of deionized water and 13.5 parts of 3-aminopropyltrimethoxysilane, react at 80°C for 3 hours, and obtain mixture B after centrifugation, washing and drying.

[0069] Step S4: Mixture A, mixture B, and binder are kneaded (kneading temperature 160℃, kneading time 2h) and granulated to obtain feedstock; the feedstock is then injection molded (injection temperature 160℃, injection pressure 120MPa, injection speed 100g / s, mold temperature 50℃) to obtain green body; the green body is then degreased (including solvent degreasing and thermal degreasing; the solvent degreasing process is: solvent is n-heptane, degreasing time is 8h, temperature is 60℃; the thermal degreasing process is: thermal degreasing temperature is 8... The material is heated to 1500℃ at 00℃ for 60 min, and then sintered (under nitrogen atmosphere protection, heated to 1500℃ at a heating rate of 10℃ / min for 12 h) to obtain a high wear-resistant alloy material; by mass percentage, 20wt% of mixture A, 45wt% of mixture B, and the remainder is binder; the binder includes the following components by mass percentage: 20wt% ethylene-vinyl acetate copolymer, 20wt% high-density polyethylene, 10wt% polylactide, 5% stearic acid, and the remainder is paraffin wax;

[0070] The preparation method of mercapto-containing organosilicon is as follows:

[0071] Under nitrogen protection, 0.3 parts of 3-mercaptopropylmethyldimethoxysilane, 0.9 parts of deionized water and 2.4 parts of isopropanol were mixed evenly, heated to 70°C, and 19.8 parts of hydroxyl silicone oil and 0.42 parts of tetramethylammonium hydroxide were added and mixed evenly. The mixture was reacted for 6 hours and then distilled under reduced pressure to obtain mercapto-containing organosilicon.

[0072] The preparation method of epoxy-based organosilicon modified polyester is as follows:

[0073] Step A: Under nitrogen protection, 12 parts of hydroxyl silicone oil, 1.2 parts of 3-glycidyl etheroxypropylmethyldiethoxysilane, and tetramethylammonium hydroxide silanolate were mixed evenly and reacted at 100°C for 7 hours. After vacuum distillation, epoxy-based organosilicon was obtained. The amount of tetramethylammonium hydroxide silanolate used was 0.022% of the total mass of hydroxyl silicone oil and 3-glycidyl etheroxypropylmethyldiethoxysilane.

[0074] Step B: Under nitrogen protection, 12 parts of epoxy organosilicon and 72 parts of dihydroxy-terminated unsaturated polyester are mixed evenly and reacted at 160°C for 5 hours. Then, 0.6 parts of dibutyltin dilaurate are added, and the temperature is raised to 180°C until no water is produced, thus obtaining epoxy organosilicon modified polyester.

[0075] Comparative Example 1: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0076] In step S1, the mixture includes the following components by mass percentage: Co: 1%, Cu: 1.5%, Cr3C2: 2%, with the balance being WC; compared with Example 2, Comparative Example 1 only adds 1% Co, and the other steps are the same as in Example 2.

[0077] Comparative Example 2: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0078] Compared with Example 2, step S2 of Comparative Example 2 did not introduce epoxy-based organosilicon-modified polyester, while the other steps were the same as in Example 2.

[0079] Comparative Example 3: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0080] Compared with Example 2, in step S3 of Comparative Example 3, 3-aminopropyltrimethoxysilane was not used to modify the mixture, while the other steps were the same as in Example 2.

[0081] Comparative Example 4: A preparation process for a high wear-resistant alloy material, comprising the following steps:

[0082] Compared with Example 2, Comparative Example 4 replaced the epoxy-based silicone-modified polyester with the same mass of epoxy-based silicone, while the other steps were the same as in Example 2.

[0083] Experiment: High wear-resistant alloy materials prepared in Examples 1-3 and Comparative Examples 1-4 were used to prepare samples. Hardness test: The hardness of the samples was measured using a Rockwell hardness tester. 5-6 test sites were selected, and the average value was taken. The load was 150 kg, and the loading time was 5 s. Bending strength test: The bending strength of the samples was tested using an electronic universal testing machine. The sample size was 50 mm × 8 mm × 5 mm, and the loading rate was 0.5 mm / min. Wear resistance test: The wear resistance was tested using a Bruker UMT TriboLab friction and wear tester. The test time was 48 h, and the unit wear amount was calculated.

[0084]

[0085] Based on the data in the table above, the following conclusions can be clearly drawn:

[0086] 1. Compared with Example 1, the hardness and bending strength of Comparative Example 1 are reduced, and the wear is increased. It can be seen that reducing the Co content in the mixture leads to a decrease in the wettability of the hard phase and the interfacial bonding strength, which will have an adverse effect on the comprehensive performance of the alloy material.

[0087] 2. Compared with Examples 1-3, the hardness and flexural strength of Comparative Examples 2-4 decreased, while the wear increased. This indicates that Comparative Example 2 did not introduce epoxy-based organosilicon-modified polyester, resulting in a decrease in the compatibility between the binder and the mixture. Comparative Example 3 did not use 3-aminopropyltrimethoxysilane to modify the mixture, thus failing to introduce amino groups, which led to a decrease in the bonding force between the metal powders. Compared with the epoxy-based organosilicon used in Comparative Example 4, the epoxy-based organosilicon-modified polyester prepared in this invention has a better modification effect.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process method article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process method article or apparatus.

[0089] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method of producing a high abrasion resistant alloy material, characterized by: The preparation method comprises the following steps: Step S1: WC powder, Co powder, Cu powder, Cr3C2 powder and anhydrous ethanol are put into a wet mill for ball milling, and then taken out and dried to obtain a mixture; Step S2: thiol-containing organosilicon, epoxy organosilicon modified polyester and dimethylbenzene are uniformly mixed to obtain a modifier; the mixture and the modifier are mixed and ultrasonically dispersed for 30-50 min, and then stirred at 120-130 ℃ for 1-2 h, and then filtered, washed and dried to obtain a mixture A; Step S3: the mixture is ultrasonically dispersed in a mixed solution of anhydrous ethanol, deionized water and 3-aminopropyltrimethoxysilane, and then reacted at 70-80 ℃ for 1-3 h, and then centrifuged, washed and dried to obtain a mixture B; Step S4: the mixture A, the mixture B and a binder are mixed and granulated to obtain a feedstock; the feedstock is injection molded to obtain a green body; the green body is debound and then sintered to obtain a high wear-resistant alloy material; In the step S2, the mass ratio of the thiol-containing organosilicon, the epoxy organosilicon modified polyester and the dimethylbenzene is 1: (4-5) : (10-12) ; The preparation method of the epoxy organosilicon modified polyester is as follows: Step A: under nitrogen protection, hydroxyl silicone oil, 3-glycidyl ether oxypropyl methyl diethoxysilane and tetramethylammonium hydroxide silanol salt are uniformly mixed and reacted at 90-100 ℃ for 5-7 h, and then distilled under reduced pressure to obtain epoxy organosilicon; Step B: under nitrogen protection, the epoxy organosilicon and dihydroxy-terminated unsaturated polyester are uniformly mixed and reacted at 140-160 ℃ for 3-5 h, and then dibutyltin dilaurate is added, the temperature is increased to 170-180 ℃, and the reaction is continued until no water is generated to obtain the epoxy organosilicon modified polyester.

2. The method for preparing a high wear-resistant alloy material according to claim 1, characterized in that: In the step S1, the mixture comprises the following components in the following mass percentages: Co: 3-6%, Cu: 1-2%, Cr3C2: 2-4%, and the balance is WC.

3. The method for preparing a high wear-resistant alloy material according to claim 1, characterized in that: The preparation method of the thiol-containing organosilicon is as follows: Under nitrogen protection, 3-mercaptopropyl methyl dimethoxysilane, deionized water and isopropyl alcohol are uniformly mixed, the temperature is increased to 60-70 ℃, hydroxyl silicone oil and tetramethylammonium hydroxide are uniformly mixed, and the reaction is continued for 4-6 h, and then distilled under reduced pressure to obtain the thiol-containing organosilicon.

4. The method of claim 1, wherein the high wear resistant alloy material is prepared by the steps of: In the step S3, the mass ratio of the mixture, anhydrous ethanol, deionized water and 3-aminopropyltrimethoxysilane is 1: (10-12) : (2-4) : (0.1-0.3). ​ 5. The method for preparing a high wear-resistant alloy material according to claim 1, characterized in that: In the step S4, the amounts of the components are as follows: 15-20 wt% of the mixture A, 35-45 wt% of the mixture B, and the balance is the binder.

6. The method of claim 5, wherein the high wear resistant alloy material is prepared by the steps of: The binder comprises the following components in the following mass percentages: ethylene-vinyl acetate copolymer 10-20 wt%, high-density polyethylene 10-20 wt%, polylactide 5-10 wt%, stearic acid 3-5%, and the balance is paraffin wax. ​ 7. A high wear-resistant alloy material prepared by the preparation method according to any one of claims 1-6.

8. Application of the high wear-resistant alloy material according to claim 7 to a throat-type nozzle.

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