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Preparation method of ultra-coarse-grain hard alloy

A hard alloy, coarse-grained technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of slurry precipitation, gun blocking, etc.

Inactive Publication Date: 2021-06-08
晋城富联鸿刃科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to provide a preparation method of ultra-coarse-grained cemented carbide, which can solve the problems of slurry precipitation and gun blocking that occur when ultra-coarse-grained cemented carbide is spray-dried

Method used

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  • Preparation method of ultra-coarse-grain hard alloy
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  • Preparation method of ultra-coarse-grain hard alloy

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preparation example Construction

[0027] see figure 1 , some embodiments of the present invention provide a method for preparing ultra-coarse-grained cemented carbide, comprising the following steps:

[0028] Step S11, adding raw materials and alcohol into a ball mill for wet grinding to obtain a first slurry, wherein the raw materials include cobalt powder and tungsten carbide.

[0029] In some embodiments, the raw material further includes tungsten powder or carbon powder. The tungsten powder and the carbon powder can be used to adjust the carbon content of the raw material (that is, the mass ratio of carbon to the raw material). Specifically, when the carbon content of the raw material is too high, the tungsten powder can be added to reduce the carbon content of the raw material; when the carbon content of the raw material is too low, the carbon powder can be added to increase the carbon content of the raw material. The carbon content of the feedstock.

[0030] A plasticizer may also be added to the ball...

Embodiment 1

[0051] The first step, 20kg of 10-type cobalt powder and tungsten powder or carbon powder (the tungsten powder and the carbon powder are specifically added according to the carbon content of the raw material) and a small amount of alcohol are added to the tilting ball mill, fully wetted Grind and mix for 2 hours, then add 180kg of Jinlu 200 tungsten carbide, paraffin wax accounting for 2% of the mass of the raw material, oleic acid accounting for 1% of the mass of the paraffin wax, and alcohol into the ball mill to make the carbon content of the raw material The content is 6.10%, the ball-to-material ratio is 3:1, the solid-to-liquid ratio is 140ml / kg, and the wet grinding is continued for 12 hours to obtain the first slurry.

[0052] In the second step, stop the machine 1h-2h before the end of the wet grinding in step S11, add a suspending agent accounting for 0.2% of the mass of the raw material into the first slurry, and then complete the wet grinding to obtain the second S...

Embodiment 2

[0057] The difference between embodiment 2 and embodiment 1 is:

[0058] The time to continue wet grinding in the first step is 24h.

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Abstract

The invention provides a preparation method of an ultra-coarse-grain hard alloy, which comprises the following steps that raw materials and alcohol are added into a ball mill for wet milling to obtain first slurry, wherein the raw materials comprise cobalt powder and tungsten carbide; a suspending agent is added into the first slurry for wet milling to obtain second slurry; the second slurry is taken out and subjected to spray drying to obtain a mixture; the mixture is pressed to form a green compact; and the green compact is sintered to obtain the ultra-coarse-grain hard alloy. According to the preparation method provided by the invention, the problems of slurry precipitation and gun blockage during spray drying of the ultra-coarse-grain hard alloy can be solved.

Description

technical field [0001] The invention relates to the technical field of hard alloy material manufacture, in particular to a preparation method of ultra-coarse grain hard alloy. Background technique [0002] Due to its excellent wear resistance, impact resistance and thermal fatigue resistance, ultra-coarse grained cemented carbide is widely used in mining, die stamping and rock formations. The process of preparing cemented carbide is to use tungsten carbide powder and cobalt powder as raw materials, form a slurry after batching and ball milling, and form a mixture after spray drying and granulation, and then prepare a green product by forming technology, and then pass The sintering process is prepared into cemented carbide products. [0003] However, during the spray-drying process of ultra-coarse-grained cemented carbide, the slurry is prone to precipitation in the barrel, causing the spray gun to be blocked. Contents of the invention [0004] In view of this, it is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C29/08B22F9/04B22F1/00B22F3/02B22F3/10
CPCC22C1/051C22C29/067C22C29/08B22F9/04B22F3/02B22F3/10B22F2009/043B22F2009/042B22F1/103B22F1/142B22F1/10
Inventor 王超袁晓波孙娜薛桂全李军旗蒋益民项凤鸣边伟李尧贺晨晨马永岗
Owner 晋城富联鸿刃科技有限公司
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