阅读说明：本技术 一种分层植砂砂带用磨料的制备方法和应用方法 (Preparation method and application method of abrasive for layered sand-planting abrasive belt ) 是由 赵志伟 夏绍灵 冷成 李亚辉 于 2020-12-30 设计创作，主要内容包括：本发明涉及磨削技术领域,具体涉及一种磨料,更具体涉及一种分层植砂砂带用磨料的制备方法和应用方法；其技术要点如下：包括细粒度磨料和复合磨料,复合磨料,按照重量份数计算,包括如下组分：铜基硬质合金20～30份、锆刚玉30～40份和AlCrSiN粉末10～20份。应用一条砂带就能完成多道工序的磨削功能,降低物耗能耗与时耗,提高功效降低成本。(The invention relates to the technical field of grinding, in particular to an abrasive, and more particularly relates to a preparation method and an application method of the abrasive for a layered sand-planting abrasive belt; the technical points are as follows: the abrasive material comprises a fine-grained abrasive material and a composite abrasive material, wherein the composite abrasive material comprises the following components in parts by weight: 20-30 parts of copper-based hard alloy, 30-40 parts of zirconia alumina and 10-20 parts of AlCrSiN powder. The grinding function of a plurality of processes can be completed by using one abrasive belt, so that the material consumption, the energy consumption and the time consumption are reduced, the effect is improved, and the cost is reduced.)

1. The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, and is characterized in that the composite abrasive comprises the following components in parts by weight: 20-30 parts of copper-based hard alloy, 30-40 parts of zirconia alumina and 10-20 parts of AlCrSiN powder.

2. The abrasive for layered sand-planted abrasive belt according to claim 1, wherein the fine-grained abrasive is composed of any one or more of diamond, silicon carbide or garnet.

3. The abrasive material for the layered sand-planted abrasive belt according to claim 1 or 2, wherein the copper-based hard alloy comprises the following preparation components in parts by weight: 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder.

4. The abrasive material for layered sand-planted abrasive belt according to claim 3, wherein the fine-grained abrasive material is coated with a wear-resistant coating.

5. The abrasive material for the layered sand-planted abrasive belt according to claim 4, wherein the wear-resistant coating comprises the following components in parts by weight: 10-20 parts of modified rosin, 20-40 parts of a hard acid salt, 5-8 parts of pentaerythritol, 5-8 parts of ethylene bis stearamide and 80-90 parts of water.

6. The abrasive for layered sand-planted abrasive belt according to claim 5, wherein said modified rosin is rosin soap.

7. The abrasive for layered sand-planted abrasive belt according to claim 5, wherein the salt of hard acid is any one of magnesium stearate, sodium stearate or calcium stearate.

8. The abrasive material for the layered sand-planted abrasive belt according to claim 3, wherein the preparation method of the copper-based cemented carbide comprises the following steps:

s1, adding 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining uniformly mixed ball milling slurry;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 mu m;

and S3, sintering the particles obtained in the step S2 to obtain the copper-based hard alloy.

9. The method for preparing the abrasive material for the layered sand-planted abrasive belt according to claim 1, which comprises the following steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive with a wear-resistant coating.

10. The method of claim 1, wherein the fine grit abrasive is uniformly distributed on the surface of the make coat by gravity sanding, and then the composite abrasive is uniformly embedded into the gaps of the fine grit abrasive by electrostatic sanding, the fine grit abrasive completely surrounds the root of the composite abrasive to form a firm base coat.

Technical Field

The invention relates to the technical field of grinding, in particular to an abrasive, and more particularly relates to a preparation method and an application method of an abrasive for a layered sand-planting abrasive belt.

Background

Grinding is an important process in the manufacturing industry. Casting and shaping, flattening external mounting, derusting and polishing, and particularly, a low-roughness processing technology of rolling and friction contact surfaces and the like can not be separated from a grinding technology. The modern manufacturing industry is rapidly developing, and various alloy steels made of rare metals such as titanium, nickel, chromium and the like are widely applied. The requirements of surface treatment technology and process are higher and higher, and new requirements such as specialization, refinement, high efficiency, low cost, no pollution and the like are continuously provided for a coated abrasive product called 'modern industrial teeth'. In foreign countries, belt grinding has become a more complete and self-contained processing technology through the development of fifty years. Almost all engineering materials and mechanical equipment can be processed from living goods to aerospace equipment. It is favored because of its high efficiency, good precision, wide application range, strong adaptability, low use cost, safe and convenient operation, etc. In terms of the market, medium and high grade products in developed countries such as the united states, the germany, the japanese, and the korea have always had an absolute advantage in the international market.

With the rapid development of manufacturing industry, high-end requirements are also put forward on processing technology. In the case of belt grinding, it is conventional to implant an abrasive material, such as silicon carbide, alumina or other synthetic composite abrasives such as cubic boron nitride, etc., into the grinding surface. It is also the case that each abrasive has its own advantages and corresponding disadvantages. The efficacy of a conventional sanding belt appears to be relatively single. Sometimes, to finish grinding a workpiece, the abrasive belts with different properties must be replaced several times to achieve the expected effect. How to use a belt to finish the grinding function of multiple processes, reduce material consumption, energy consumption and time consumption, improve the efficiency and reduce the cost, and become the urgent need of the manufacturing industry.

In view of the defects of the existing abrasive, the inventor develops a preparation method and an application method of the abrasive for the layered sand-planted abrasive belt based on years of abundant experience and professional knowledge of the materials, and by means of theoretical analysis and research innovation, the abrasive belt has high strength, small ductility, high cutting efficiency and wear resistance.

Disclosure of Invention

The invention aims to provide a grinding material for a layered sand-planted abrasive belt, which has the advantages of high strength, small ductility, high cutting efficiency and wear resistance of the abrasive belt product and application value.

The technical purpose of the invention is realized by the following technical scheme:

the abrasive for the layered sand-planted abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 20-30 parts of copper-based hard alloy, 30-40 parts of zirconia alumina and 10-20 parts of AlCrSiN powder.

The copper-based hard alloy is coated with the zirconia corundum outside, the zirconia corundum is coated with the AlCrSiN outside to form the abrasive with hard middle and soft inside and soft outside, the strength of the copper-based hard alloy on the inner layer is fully exerted in the grinding process, the extensibility of the copper-based hard alloy is exerted, and the stress is fully absorbed in the grinding process, so that the zirconia corundum and the AlCrSiN do not need to bear excessive stress, the service lives of the zirconia corundum and the AlCrSiN are prolonged, the service life of the abrasive is prolonged, the copper-based hard metal also has good heat-conducting property, high friction heating cannot be caused, workpieces are deformed or scratched, and the polishing quality is improved.

The AlCrSiN particles are finer and denser, so that the polishing effect on the workpiece is achieved in the polishing process, and the polishing quality is improved.

Further, the fine-grained abrasive is composed of any one or more of diamond, silicon carbide, or garnet. The hardness of the diamond, the silicon carbide and the garnet is high in Mohs hardness, but the toughness is poor, so that the stress can be buffered by adding the copper-based hard alloy into the diamond, the silicon carbide and the garnet, the problem of poor toughness of the diamond, the silicon carbide and the garnet is solved, the composite abrasive is hard and tough, the crystal form refined by the AlCrSiN can regularly fall off in layers, the abrasive is self-sharp and ordered, the sharpness of the whole abrasive particle is kept, and the processing effect is good.

Further, the copper-based hard alloy comprises the following preparation components in parts by weight: 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder. The titanium carbide can form a new crystal system with the zirconia alumina at the high sintering temperature, and the bonding force between the copper-based hard alloy and the zirconia alumina is improved.

Furthermore, the fine-grained abrasive is externally provided with a wear-resistant coating. The invention adopts a coating process for the fine-grained grinding material, further strengthens the grinding material and can reduce the grinding surface temperature.

Further, the wear-resistant coating comprises the following components in parts by weight: 10-20 parts of modified rosin, 20-40 parts of a hard acid salt, 5-8 parts of pentaerythritol, 5-8 parts of ethylene bis stearamide and 80-90 parts of water. The hydrophobic property of coating can be improved in the addition of pentaerythritol and ethylene bis stearamide, reduce surface tension simultaneously, the stearate particle surface forms bilayer structure, outer molecule end has stronger hydrophilic ability, increase the degree of wetting of particle and water, and make and keep away from because of electrostatic repulsion between each particle, make the system even, the suspensibility increases, the aquatic of dispersion that can be stable, thereby guarantee the environmental protection and the stability of final coating glue solution, can realize the accurate control of coating volume, thereby furthest's promotion coating anti-blocking performance.

Further, the modified rosin is a rosin soap. The modified rosin provided by the invention is rosin soap, and the resin acid in the rosin structure has the characteristics of monocarboxylic acid and can perform a series of carboxyl reactions; and metal oxides or hydroxides at high temperatures, to form derivative resin metal salts, also known as rosin soaps. The invention adds rosin soap into water solvent to avoid using formaldehyde solvent, to disperse the hard acid salt in water through the amphipathy of rosin soap, and through the electrostatic action of metal ion in rosin soap, to prevent the hard acid salt from generating agglomeration in water, to improve the dispersibility of hard acid salt in water.

Further, the hard acid salt is any one of magnesium stearate, sodium stearate or calcium stearate.

Further, the preparation method of the copper-based hard alloy comprises the following steps:

s1, adding 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 to obtain the copper-based hard alloy.

In the invention, the oil-ammonia column is adopted to mold the powder, so as to obtain more uniform and fine particles, and the particles obtained by oil-ammonia column molding are more mellow and full, so that the zirconia alumina can more uniformly cover the surfaces of the particles in the subsequent common ball milling and sintering processes with the zirconia alumina, and the self-sharpening performance of the abrasive is improved.

Preferably, the sintering temperature in step S3 is 900 to 1300 DEG C

The invention also provides a preparation method of the abrasive for the layered sand-planted abrasive belt, which has the same technical effect.

The technical purpose of the invention is realized by the following technical scheme:

the invention provides a preparation method of an abrasive for a layered sand-planting abrasive belt, which comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive with a wear-resistant coating.

Preferably, the sintering temperature in step a3 is 900 to 1300 ℃.

The invention also aims to provide an application method of the abrasive for the layered sand-planted abrasive belt, which has the same technical effect.

The technical purpose of the invention is realized by the following technical scheme:

the invention provides an application method of an abrasive for a layered sand-planting abrasive belt, which comprises the following steps: the method comprises the steps of uniformly distributing fine-grained grinding materials on the surface of a bottom glue layer through gravity sand planting, uniformly embedding the composite grinding materials into gaps of the fine-grained grinding materials through electrostatic sand planting, and completely surrounding the roots of the composite grinding materials by the fine-grained grinding materials to form a firm subbase.

In conclusion, the invention has the following beneficial effects:

according to the abrasive for the layered sand-planted abrasive belt, the preparation method and the application method thereof, the two abrasives are compounded and used in two different sand-planting modes, and can be continuously broken and generate a new cutting edge during grinding, so that the abrasive belt is particularly good in self-sharpening performance, wear-resistant and high in grinding efficiency, and the purposes of high efficiency, good heat transfer performance, good self-sharpening performance and long service life of products during grinding are achieved.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the specific embodiments, features and effects of the abrasive for the layered sand-planted abrasive belt according to the present invention, the preparation method and the application method thereof are described in detail below.

Example 1: abrasive for layered sand-planting abrasive belt and preparation method and application method thereof

The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 20-30 parts of copper-based hard alloy, 30-40 parts of zirconia alumina and 10-20 parts of AlCrSiN powder, and a wear-resistant coating is arranged outside the fine-grained abrasive.

The preparation method of the copper-based hard alloy in the embodiment is as follows:

s1, adding 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 at the sintering temperature of 900-1300 ℃ to obtain the copper-based hard alloy.

In this embodiment, the wear-resistant coating comprises the following components in parts by weight: 10-20 parts of modified rosin, 20-40 parts of a hard acid salt, 5-8 parts of pentaerythritol, 5-8 parts of ethylene bis stearamide and 80-90 parts of water, wherein the wear-resistant coating is prepared by uniformly stirring the materials, coating the materials on the surface layer of a fine-grained abrasive, and drying the fine-grained abrasive.

The preparation method of the abrasive for the layered sand-planted abrasive belt provided by the embodiment comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles at the sintering temperature of 900-1300 ℃;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive with a wear-resistant coating.

An application method of the abrasive for the layered sand-planting abrasive belt comprises the following steps: the method comprises the steps of uniformly distributing fine-grained grinding materials on the surface of a bottom glue layer through gravity sand planting, uniformly embedding the composite grinding materials into gaps of the fine-grained grinding materials through electrostatic sand planting, and completely surrounding the roots of the composite grinding materials by the fine-grained grinding materials to form a firm subbase.

Example 2: abrasive for layered sand-planting abrasive belt and preparation method and application method thereof

The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 30 parts of copper-based hard alloy, 40 parts of zirconia alumina and 10-20 parts of AlCrSiN powder, wherein the fine-grained abrasive is diamond, and a wear-resistant coating is arranged outside the fine-grained abrasive.

In this embodiment, the wear-resistant coating comprises the following components in parts by weight: 10 parts of rosin soap, 20 parts of hard acid salt, 5 parts of pentaerythritol, 5 parts of ethylene bis stearamide and 80 parts of water, wherein the preparation method of the wear-resistant coating comprises the steps of uniformly stirring the materials, coating the materials on the surface layer of a fine-grained abrasive, and drying the material.

The preparation method of the copper-based hard alloy in the embodiment is as follows:

s1, adding 2 parts of titanium carbide powder, 1 part of antimony powder, 7 parts of tin powder, 10 parts of zinc powder, 0.5 part of nickel powder, 2 parts of bismuth powder and 50 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 at the sintering temperature of 900-1300 ℃ to obtain the copper-based hard alloy.

The preparation method of the abrasive for the layered sand-planted abrasive belt provided by the embodiment comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles at the sintering temperature of 900-1300 ℃;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive diamond with a wear-resistant coating.

An application method of the abrasive for the layered sand-planting abrasive belt comprises the following steps: the method comprises the steps of uniformly distributing fine-grained abrasive diamonds on the surface of a bottom glue layer through gravity sand planting, uniformly embedding composite abrasives into gaps of the fine-grained abrasive diamonds through electrostatic sand planting, and completely surrounding the roots of the composite abrasives to form a firm subbase.

Example 3: abrasive for layered sand-planting abrasive belt and preparation method and application method thereof

The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 30 parts of copper-based hard alloy, 40 parts of zirconia alumina and 20 parts of AlCrSiN powder, wherein a wear-resistant coating is arranged outside the fine-grained abrasive garnet.

In this embodiment, the wear-resistant coating comprises the following components in parts by weight: 20 parts of rosin soap, 40 parts of hard acid salt, 8 parts of pentaerythritol, 8 parts of ethylene bis stearamide and 90 parts of water, wherein the preparation method of the wear-resistant coating comprises the steps of uniformly stirring the materials, coating the materials on the surface layer of a fine-grained abrasive, and drying the material.

The preparation method of the copper-based hard alloy in the embodiment is as follows:

s1, adding 3 parts of titanium carbide powder, 2.5 parts of antimony powder, 9 parts of tin powder, 12 parts of zinc powder, 1.5 parts of nickel powder, 3.5 parts of bismuth powder and 60 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 at the sintering temperature of 900-1300 ℃ to obtain the copper-based hard alloy.

The preparation method of the abrasive for the layered sand-planted abrasive belt provided by the embodiment comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles at the sintering temperature of 900-1300 ℃;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive with a wear-resistant coating.

An application method of the abrasive for the layered sand-planting abrasive belt comprises the following steps: the method comprises the steps of uniformly distributing fine-grained grinding materials on the surface of a bottom glue layer through gravity sand planting, uniformly embedding the composite grinding materials into gaps of the fine-grained grinding materials through electrostatic sand planting, and completely surrounding the roots of the composite grinding materials by the fine-grained grinding materials to form a firm subbase.

Example 4: abrasive for layered sand-planting abrasive belt and preparation method and application method thereof

The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 25 parts of copper-based hard alloy, 38 parts of zirconia alumina and 17 parts of AlCrSiN powder, and a wear-resistant coating is arranged outside the fine-grained abrasive silicon carbide.

In this embodiment, the wear-resistant coating comprises the following components in parts by weight: 12 parts of rosin soap, 24 parts of hard acid salt, 6 parts of pentaerythritol, 6 parts of ethylene bis stearamide and 85 parts of water, wherein the preparation method of the wear-resistant coating comprises the steps of uniformly stirring the materials, coating the materials on the surface layer of a fine-grained abrasive, and drying the material.

The preparation method of the copper-based hard alloy in the embodiment is as follows:

s1, adding 2-3 parts of titanium carbide powder, 1-2.5 parts of antimony powder, 7-9 parts of tin powder, 10-12 parts of zinc powder, 0.5-1.5 parts of nickel powder, 2-3.5 parts of bismuth powder and 50-60 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 at the sintering temperature of 900-1300 ℃ to obtain the copper-based hard alloy.

The preparation method of the abrasive for the layered sand-planted abrasive belt provided by the embodiment comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles at the sintering temperature of 900-1300 ℃;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive silicon carbide with a wear-resistant coating.

An application method of the abrasive for the layered sand-planting abrasive belt comprises the following steps: the method comprises the steps of uniformly distributing fine-grained grinding materials on the surface of a bottom glue layer through gravity sand planting, uniformly embedding the composite grinding materials into gaps of the fine-grained grinding materials through electrostatic sand planting, and completely surrounding the roots of the composite grinding materials by the fine-grained grinding materials to form a firm subbase.

Example 5: abrasive for layered sand-planting abrasive belt and preparation method and application method thereof

The abrasive for the layered sand-planting abrasive belt comprises a fine-grained abrasive and a composite abrasive, wherein the composite abrasive comprises the following components in parts by weight: 22 parts of copper-based hard alloy, 38 parts of zirconia alumina and 17 parts of AlCrSiN powder, and a wear-resistant coating is arranged outside the fine-grained abrasive.

In this embodiment, the wear-resistant coating comprises the following components in parts by weight: 17 parts of rosin soap, 25 parts of a hard acid salt, 6 parts of pentaerythritol, 7 parts of ethylene bis stearamide and 89 parts of water, wherein the preparation method of the wear-resistant coating comprises the steps of uniformly stirring the materials, coating the materials on the surface layer of a fine-grained abrasive, and drying the material.

The preparation method of the copper-based hard alloy in the embodiment is as follows:

s1, adding 2.5 parts of titanium carbide powder, 1.5 parts of antimony powder, 7.5 parts of tin powder, 11 parts of zinc powder, 0.8 part of nickel powder, 2.5 parts of bismuth powder and 56 parts of copper powder into a ball mill for ball milling, wherein a ball milling medium is ethanol, and thus obtaining ball milling slurry which is uniformly mixed;

s2, adding the ball-milling slurry obtained in the step S1 into an oil ammonia column for molding to form particles with the particle size of 10-15 microns;

and S3, sintering the particles obtained in the step S2 at the sintering temperature of 900-1300 ℃ to obtain the copper-based hard alloy.

The preparation method of the abrasive for the layered sand-planted abrasive belt provided by the embodiment comprises the following operation steps:

A1. preparing copper-based hard alloy;

A2. putting the copper-based hard alloy and the zirconium corundum together into a ball mill for ball milling, wherein the solvent is ethanol, so as to obtain mixed slurry A;

A3. sintering the mixed slurry A into particles at the sintering temperature of 900-1300 ℃;

A4. spraying AlCrSiN powder on the surfaces of the particles obtained in the step A3 by using a plasma spraying mode to obtain a composite abrasive;

A5. and coating the fine-grained abrasive with a wear-resistant coating.

An application method of the abrasive for the layered sand-planting abrasive belt comprises the following steps: the method comprises the steps of uniformly distributing fine-grained grinding materials on the surface of a bottom glue layer through gravity sand planting, uniformly embedding the composite grinding materials into gaps of the fine-grained grinding materials through electrostatic sand planting, and completely surrounding the roots of the composite grinding materials by the fine-grained grinding materials to form a firm subbase.

Performance testing

The abrasive material of the embodiment 1-5 of the invention is prepared by the following product process route: the process route of the product is as follows: the method comprises the steps of raw cloth, dipping, drying, sanding, high-temperature shaping, sanding, back coating 1, drying, back coating 2, drying, pre-coating, drying, edge cutting, finished cloth base, printing, base glue, gravity sand planting, electrostatic sand planting, drying, glue compounding, drying, semi-finished product, curing, standing, bending, coating and drying to obtain the finished product, wherein the gravity sand planting and electrostatic sand planting process is carried out according to the application method of the embodiment 1-5.

The obtained finished product is subjected to multiple tests on prepared abrasive belt samples by the national abrasive tool quality supervision and inspection center, and the main performances of the product prepared by the invention are compared and inspected with imported Japanese products (NCA J870K) and Korean products (DEERFOS JA513) (shown in the following table 1):

TABLE 1 comparison of the main technical indices

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.