Preparation method of anti-wear tungsten carbide alloy material

A technology of tungsten carbide alloy and tungsten carbide, which is applied in the direction of carbide, tungsten/molybdenum carbide, etc., can solve the problems of low mechanical strength and poor wear resistance, improve wear resistance, reduce wear, and have broad application prospects Effect

Active Publication Date: 2020-08-04
HUNAN GOLDEN EAGLE ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a preparation method of wear-resistant tungsten carbide alloy material for the defects of relatively poor wear resistance and low mechanical strength in common hard alloys at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] Preparation of expanded graphite:

[0049] Weigh the expandable graphite and put it in an oven, dry it at 120~130℃ for 12~14h, put the dried expandable graphite into a microwave reactor, treat it with a power of 1~2kW for 1~2min, and then cool to room temperature naturally , Continue to repeat the microwave treatment and heat and expand 3 to 5 times to obtain expanded graphite;

[0050] Preparation of layered tungsten carbide powder:

[0051] According to the mass ratio of 10:50:1, mix the above-mentioned expanded graphite, ammonium tungstate solution and starch with a concentration of 1mol / L, and put them in an evaporating dish, heat to 100~110℃, heat preservation, evaporation and crystallization until the solution Complete evaporation of water ends;

[0052] Preparation of nanotube particles:

[0053] Grind the crystals obtained above into 500-600 mesh particles, mix them with ammonium bicarbonate and polyvinyl alcohol at a mass ratio of 1:1:10, then put them into a beaker, a...

example 1

[0060] Preparation of expanded graphite:

[0061] Weigh the expandable graphite into an oven and dry it at 120°C for 12 hours. Put the dried expandable graphite into a microwave reactor, treat it with a power of 1kW for 1 min and then cool it to room temperature naturally, continue to repeat the microwave treatment and heat expansion 3 Time, get expanded graphite;

[0062] Preparation of layered tungsten carbide powder:

[0063] According to the mass ratio of 10:50:1, mix the above-mentioned expanded graphite, 1mol / L ammonium tungstate solution and starch into an evaporating dish, heat to 100°C, keep heat and evaporate and crystallize until the water in the solution is complete End of evaporation

[0064] Grind the crystals obtained above into 500-mesh particles, mix them with ammonium bicarbonate and polyvinyl alcohol at a mass ratio of 1:1:10, then put them into a beaker, and then add deionized water with a mass of polyvinyl alcohol to the beaker. Start stirring at 300r / min for 10...

example 2

[0071] Preparation of expanded graphite:

[0072] Weigh the expandable graphite and put it in an oven, dry it at 120~130℃ for 13h, put the dried expandable graphite into a microwave reactor, treat it with 1kW power for 2min, then cool it to room temperature naturally, continue to repeat the microwave heating Expand 4 times to obtain expanded graphite;

[0073] Preparation of layered tungsten carbide powder:

[0074] According to the mass ratio of 10:50:1, the above-mentioned expanded graphite, 1mol / L ammonium tungstate solution and starch are mixed and put into an evaporating dish, heated to 105°C, heat preservation, evaporation and crystallization until the water in the solution is complete End of evaporation

[0075] Preparation of nanotube particles:

[0076] Grind the crystals obtained above into 550 mesh particles, mix them with ammonium bicarbonate and polyvinyl alcohol at a mass ratio of 1:1:10, and put them into a beaker, and then add deionized water of the same quality as pol...

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Abstract

The invention relates to a preparation method of an anti-wear tungsten carbide alloy material, and belongs to the technical field of metal metallurgy. The preparation method comprises the following steps of firstly, taking expanded graphite as a template, mixing the expanded graphite with an ammonium tungstate solution and starch, heating and evaporating to crystallize and separate out tungsten inthe form of ammonium paratungstate, and controlling uniform crystal granularity by virtue of polyhydroxy steric hindrance of the starch so as to enable thermally reduced tungsten to be uniformly attached to the surface of the expanded graphite; then generating a tungsten carbide layer on the surface of the expanded graphite, and therefore, obtaining tungsten carbide powder with a graphite interlayer structure; and finally, blending and sintering the tungsten carbide powder and other metal powder, and preparing the wear-resistant tungsten carbide alloy material finally. Due to the fact that the tungsten carbide interlayer structure can slide along the metal powder interlayer and directionally move in the friction direction in the friction state, therefore, consumption of internal energy ofhard alloy material is reduced, abrasion of the hard alloy material is reduced, damage to a hard alloy structure due to repeated volume change can be avoided through the interlayer structure, and theabrasion resistance is further improved.

Description

Technical field [0001] The invention relates to a method for preparing a wear-resistant tungsten carbide alloy material, which belongs to the technical field of metal metallurgy. Background technique [0002] Cemented carbide is based on one or more metal carbides (tungsten carbide, titanium carbide, etc.) with high hardness and high melting point and cobalt, nickel and other metals or their alloys as the binder phase, synthesized by powder metallurgy Cermet materials are one of the most typical alloy materials prepared by powder metallurgy. [0003] From the point of view of composition, cemented carbide is a mixture of hard phase and binder phase. The binder phase generally uses metals with good plasticity and toughness, while the hard phase uses high hardness and high strength. From the structural analysis, the binder phase is distributed between different hard phase grains to form a cladding structure, which plays the role of binding the hard phase. Because of this special c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10B22F9/04B22F3/10C01B32/949
CPCB22F3/1007B22F9/04B22F2009/043B22F2999/00C22C1/051C22C29/067C22C29/08C01B32/949B22F2201/20
Inventor 李启龙
Owner HUNAN GOLDEN EAGLE ENERGY TECH CO LTD
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