Tungsten-cobalt hard alloy resistant to acid and alkali environment and preparation method of tungsten-cobalt hard alloy

A cemented carbide, acid and alkali resistance technology, applied in the field of powder metallurgy materials, can solve the problems such as the stability cannot be well guaranteed, the scope of application is small, and the corrosion is easy to occur, and achieves good toughness, excellent corrosion resistance, The effect of expanding the scope of application

Inactive Publication Date: 2020-08-04
GANZHOU HAICHUANG TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, WC in WC-Co cemented carbide is inert and stable in acidic conditions, but prone to corrosion in alkaline conditions; Co is stable in alkaline and easily corroded in acidic solutions, so The corrosion resistance of WC-Co cemented carbide is also closely related to the environment in which it is used. The scope of application is small, and the stability cannot be well guaranteed. Cemented carbide and its preparation method to solve the above-mentioned problems

Method used

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  • Tungsten-cobalt hard alloy resistant to acid and alkali environment and preparation method of tungsten-cobalt hard alloy
  • Tungsten-cobalt hard alloy resistant to acid and alkali environment and preparation method of tungsten-cobalt hard alloy
  • Tungsten-cobalt hard alloy resistant to acid and alkali environment and preparation method of tungsten-cobalt hard alloy

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Effect test

Embodiment 1

[0025] A tungsten-cobalt hard alloy resistant to acid and alkali environments, comprising the following components: WC-Co composite powder with a content of 97%, Mo powder with a content of 1%, and paraffin wax with a content of 2%.

Embodiment 2

[0027] A tungsten-cobalt cemented carbide resistant to acid and alkali environments, comprising the following components: 97% WC-Co composite powder, 1% Mo 2 C powder and 2% paraffin wax.

Embodiment 3

[0031] A preparation method of tungsten-cobalt cemented carbide resistant to acid and alkali environment, comprising the following steps:

[0032] S 1 , Weigh an appropriate mass of WC-Co composite powder, and prepare WC-Co composite powder by spray drying and reduction carbonization;

[0033] S 2 , will step S 1 The WC-Co composite powder prepared in the above method and appropriate weight parts of additives were put into a stainless steel ball mill tank for ball milling and mixing, and added absolute ethanol ball milling for 48 hours to obtain a mixed powder;

[0034] S 3 , will step S 2 Put the mixed powder in the vacuum oven for drying, and sieve to obtain the mixed powder;

[0035] S 4 , will step S 3 Put the mixed powder in the stainless steel pan, weigh the appropriate mass of paraffin and dissolve it in absolute ethanol, then pour it into the stainless steel pan for mixing, put it into a vacuum drying oven for drying, and put it into a granulator for Granulatio...

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Abstract

The invention provides a tungsten-cobalt hard alloy resistant to an acid and alkali environment and a preparation method of the tungsten-cobalt hard alloy. The tungsten-cobalt hard alloy is prepared from 96%-97.5% of WC-Co composite powder, 0.5%-2.0% of an additive and 2% of paraffin. The preparation method comprises the following steps of preparing WC-Co composite powder by adopting spray dryingand reduction carbonization methods; carrying out ball-milling mixing on the WC-Co composite powder and an additive to obtain mixed powder; drying the mixed powder in a vacuum drying oven, and sievingto obtain mixed powder; mixing the mixed powder with paraffin, drying, and granulating; and a pressed blank is prepared into the final hard alloy through an SPS sintering method. The corrosion resistance of the WC-Co hard alloy in an acidic or alkaline environment is improved while it is guaranteed that the WC-Co hard alloy has high hardness, high wear resistance and good toughness.

Description

technical field [0001] One or more embodiments of this specification relate to the field of powder metallurgy materials, in particular to a tungsten-cobalt cemented carbide resistant to acid and alkali environments and a preparation method thereof. Background technique [0002] Tungsten carbide-cobalt cemented carbide is currently the most widely used type of cemented carbide, which is mainly composed of hard and wear-resistant WC phase and Co phase with good toughness. With the rapid development of modern industry, people not only require cemented carbide to have high hardness, high wear resistance and good toughness, but also put forward higher requirements on the corrosion resistance of the alloy, in order to be able to Long-term service, such as various pump (valve) parts and seals used in petrochemical and marine environments. [0003] In the prior art, WC in WC-Co cemented carbide is inert and stable in acidic conditions, but is prone to corrosion in alkaline conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C1/051C22C29/005C22C29/067C22C29/08
Inventor 郭圣达王海龙王水龙王林海黄星邹爱忠
Owner GANZHOU HAICHUANG TUNGSTEN
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