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A kind of preparation method of wear-resistant tungsten carbide alloy material

A tungsten carbide alloy, tungsten carbide technology, applied in the direction of carbide, tungsten/molybdenum carbide, etc., can solve the problems of low mechanical strength, poor wear resistance, etc., to improve wear resistance, reduce wear, and uniform crystal grain size. Effect

Active Publication Date: 2021-08-06
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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  • A kind of preparation method of wear-resistant tungsten carbide alloy material

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preparation example Construction

[0048] Preparation of expanded graphite:

[0049] Weigh the expandable graphite and put it into an oven, dry it at 120-130°C for 12-14 hours, put the dried expandable graphite into a microwave reactor, process it with a power of 1-2kW for 1-2min and then naturally cool to room temperature , and continue to repeat microwave treatment for 3 to 5 times of heating and expansion to obtain expanded graphite;

[0050] Preparation of layered tungsten carbide powder:

[0051] Mix the above-mentioned expanded graphite with 1 mol / L ammonium tungstate solution and starch according to the mass ratio of 10:50:1, put them in an evaporating dish, heat up to 100-110 °C, heat preservation, evaporation and crystallization until the solution The water evaporates completely;

[0052] Preparation of Nanotubular Particles:

[0053] Grind the above-mentioned evaporative crystallized product into 500-600 mesh particles, mix it with ammonium bicarbonate and polyvinyl alcohol in a mass ratio of 1:1:10,...

example 1

[0060] Preparation of expanded graphite:

[0061] Weigh the expandable graphite and put it in an oven, 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 1min, then naturally cool to room temperature, and continue to repeat microwave treatment for heating and expansion for 3 times, to obtain expanded graphite;

[0062] Preparation of layered tungsten carbide powder:

[0063] According to the mass ratio of 10:50:1, the above-mentioned expanded graphite, ammonium tungstate solution with a concentration of 1mol / L and starch are mixed and placed in an evaporating dish, heated to 100 ° C, and thermally evaporated and crystallized until the water in the solution is completely Evaporation ends;

[0064] Preparation of Nanotubular Particles:

[0065] Grind the above-mentioned evaporative crystallization process into 500 mesh particles, mix it with ammonium bicarbonate and polyvinyl alcohol in a mass ratio of 1:...

example 2

[0072] Preparation of expanded graphite:

[0073] Weigh the expandable graphite and put it into an oven, dry it at 120-130°C for 13 hours, put the dried expandable graphite into a microwave reactor, treat it with a power of 1kW for 2 minutes, and then naturally cool to room temperature, and continue to repeat microwave treatment for heating. Expand 4 times to obtain expanded graphite;

[0074] Preparation of layered tungsten carbide powder:

[0075] According to the mass ratio of 10:50:1, the above-mentioned expanded graphite, ammonium tungstate solution with a concentration of 1 mol / L and starch were mixed and put into an evaporating dish, heated to 105 ° C, and heat preservation, evaporation and crystallization treatment until the water in the solution was completely Evaporation ends;

[0076] Preparation of Nanotubular Particles:

[0077] Grind the above-mentioned evaporative crystallization process into 550 mesh particles, mix it with ammonium bicarbonate and polyvinyl ...

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Abstract

The invention relates to a preparation method of a wear-resistant tungsten carbide alloy material, which belongs to the technical field of metallurgy. The present invention first uses expanded graphite as a template, mixes it with ammonium tungstate solution and starch, heats and evaporates, and crystallizes tungsten as ammonium paratungstate, and controls the crystallization particle size uniformly by the multi-hydroxyl hindrance of starch, so that thermally reduced tungsten is evenly attached to Expanded graphite surface, followed by sintering reaction to generate tungsten carbide layer on the expanded graphite surface, so as to obtain tungsten carbide powder with graphite interlayer structure, and finally blend and sinter tungsten carbide powder and other metal powders to finally obtain wear-resistant tungsten carbide alloy material , because the interlayer structure of tungsten carbide can slip along the interlayer of metal powder under the friction state, and move directionally along the friction direction, thereby reducing the consumption of internal energy of the cemented carbide material, reducing the wear of the cemented carbide material, and the layer The interstructure can also avoid the damage of the cemented carbide structure caused by repeated volume changes, thereby further improving the wear resistance.

Description

technical field [0001] The invention relates to a preparation method of an anti-wear tungsten carbide alloy material, belonging to the technical field of metal metallurgy. Background technique [0002] Cemented carbide is synthesized by powder metallurgy with one or more metal carbides with high hardness and high melting point (tungsten carbide, titanium carbide, etc.) as the matrix and cobalt, nickel and other metals or their alloys as the binder phase. Cermet material is one of the most typical alloy materials prepared by powder metallurgy. [0003] In terms of composition, cemented carbide is composed of 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 the different hard phase grains, forming a coating structure, which plays the role of bonding the hard phase. Because of this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10C22C29/08C22C1/05C22C1/10B22F9/04C01B32/949
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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