Method for preparing cemented carbide mixture by adopting modified wax forming agent

Abstract

A method for preparing a cemented carbide mixture by adopting an modified wax forming agent is characterized in that the method sequentially comprises the following steps that 1, all raw materials forforming the cemented carbide mixture are put into a ball-milling chamber of ball-milling equipment according to the requirements of weight parts, wherein the cemented carbide mixture is composed of 90-99 parts of cemented carbide powder, 1-10 parts of modified wax forming agent and 10-50 parts of alcohol, and the modified wax forming agent comprises paraffin, a complexing agent and an impregnating compound; 2, the mixture of all the raw materials is ball-milled; and 3, all the ball-milled raw materials are dried, and the cemented carbide mixture is obtained after drying. In the process of preparing the cemented carbide mixture through the modified wax forming agent, the modified wax forming agent is dispersed quite easily in an alcohol solvent, the fluidity of the powder is good during spraying, the powder is uniform, and powder pressing performance is good.

Description

technical field [0001] The invention relates to powder mixing production of cemented carbide, in particular to a method for preparing cemented carbide mixture using a modified wax forming agent, including ball milling and spray granulation processes. Background technique [0002] In the preparation process of cemented carbide mixture, the alcohol-based paraffin spray process is a relatively mature technology. The pure paraffin wax spray process cannot solve the problem of uniform dispersion of paraffin wax in alcohol, paraffin wax cannot evenly cover the powder, and the spray powder is difficult to form into a good ball, which makes the pure paraffin spray powder fluidity poor, and the performance of the alloy powder above 10% Co is more obvious , The pressing performance shows that the weight fluctuates greatly and the soft waste is high. The usual practice in the cemented carbide industry is to add surfactants such as oleic acid, stearic acid, and palmitic acid at the sam...

AI Technical Summary

Problems solved by technology

However, stearic acid, palmitic acid, and oleic acid all have double bonds and π bonds, and voids are formed in the bonds during the crystallization process, so the self-shrinkage rate is large and the strength is low. Adding it to the powder will reduce the powder compression formability. Additive spray powder compaction is difficult to form complex products, and low production efficiency for simple products

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