Method for preparing hard alloy mixture by attritor milling process

A technology of stirring ball milling and cemented carbide, which is applied in the field of preparation of cemented carbide mixtures, can solve the problems of high particle size requirements of raw materials, low ball milling efficiency, and high cost, and achieve easy mass production, high ball milling efficiency, and low cost. low effect

Inactive Publication Date: 2012-02-08
浙江东钨实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional preparation method of mixture is to select tungsten carbide powder and cobalt powder with particle size that meet the requirements (usually the principle that the original grain size of tungsten carbide is the same as that of the alloy after sintering) to configure the mixture, and adopt rolling ball milling, and the ball milling time is long It takes more than 96 hours to prepare a mixture with a particle size and dispersion that meets the requirements. This preparation method is time-consuming, high in cost, low in ball milling efficiency, and has high requirements on the particle size of raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Configure raw materials according to 93.6wt%WC+6wt%Co+0.3wt%Cr3C2+0.1wt%VC (the average Fischer particle size of tungsten carbide is 2.0 μm, and the average Fischer particle size of cobalt powder is 1.0 μm.), add 650ml / Kg Alcohol is used as grinding medium, and the stearic acid that adds 50ml / 200Kg is used as dispersant in the mixed material slurry, 2wt% polyoxyethylene glycol (molecular weight is 300 and 4000, wherein 300 molecular weight is 1: 7 with 4000 molecular weight ratio) as a binder. The above materials are ball milled in an SC-50 type agitating ball mill. The rotating speed of the stirring arm of the ball mill is set at 100 rpm, the filling factor is 0.5, the solid-liquid ratio (volume ratio) is 1:1, and the diameter of the grinding ball is 6.0 mm ± 0.2mm, ball-to-material ratio (4-5): 1; after ball milling for 8 hours, the particle size of the mixture is 0.8μm.

Embodiment 2

[0020] Configure raw materials according to 93.6wt%WC+6wt%Co+0.3wt%Cr3C2+0.1wt%VC (the average Fischer particle size of tungsten carbide is 2.0 μm, and the average Fischer particle size of cobalt powder is 1.0 μm.), add 650ml / Kg Alcohol is used as grinding medium, and the stearic acid that adds 50ml / 200Kg is used as dispersant in the mixed material slurry, 2wt% polyoxyethylene glycol (molecular weight is 300 and 4000, wherein 300 molecular weight is 1: 7 with 4000 molecular weight ratio) as a binder. The above materials are ball milled in an SC-50 type agitating ball mill. The rotating speed of the stirring arm of the ball mill is set at 120 rpm, the filling factor is 0.5, the solid-liquid ratio (volume ratio) is 1:1, and the diameter of the grinding ball is 6.0 mm ± 0.2mm, ball-to-material ratio (4-5): 1; after 8 hours of ball milling, the particle size of the mixture is 0.6 μm.

[0021] A kind of method that utilizes stirring ball milling process of the present invention to...

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Abstract

The invention relates to a method for preparing a hard alloy mixture, in particular to a method for preparing a hard alloy mixture by an attritor milling process. |By adopting attritor milling and adding a certain amount of dispersing agent, adhesive and the like, a superfine hard alloy mixture is obtained. The method for preparing the hard alloy mixture by the attritor milling process has the characteristics of high milling efficiency, low energy consumption, suitability for mass production and the like, and can be widely applied to preparation of the superfine hard alloy mixture.

Description

technical field [0001] The invention relates to a method for preparing cemented carbide mixture, and in particular provides a method for preparing cemented carbide mixture by using a stirring ball milling process. Background technique [0002] Cemented carbide is widely used in petroleum exploration, mining, machining, aerospace and other industries due to its high strength and high hardness. One of the key technologies in the manufacture of cemented carbide lies in the preparation of cemented carbide mixture. The traditional preparation method of mixture is to select tungsten carbide powder and cobalt powder with particle size that meet the requirements (usually the principle that the original grain size of tungsten carbide is the same as that of the alloy after sintering) to configure the mixture, and adopt rolling ball milling, and the ball milling time is long It takes more than 96 hours to prepare a mixture with particle size and dispersion that meets the requirements....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
Inventor 张敬利张平陈冬华吴立志熊成渝
Owner 浙江东钨实业有限公司
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