A preparation method of agwc contact blank based on three-dimensional skeleton

Abstract

The invention relates to the technical field of electrical contact preparation, in particular to a method for preparing an AgWC contact blank based on a three-dimensional skeleton; through the technological process of modifying WC fiber → WC fiber mat → WC fiber skeleton → vacuum infiltration, the obtained A AgWC contact blank with dense and uniform structure; the innovative points of the design scheme of the present invention are: WC fiber is used as raw material, and the WC fiber blank can maintain good porosity and pore structure after infiltration and sintering; the explosive consolidation method is adopted , due to the transient nature of the process, the WC fibers inside the AgWC contact blank have no time to grow, so the original properties of the material can be better maintained and closed voids can be avoided.

Description

A kind of preparation method of AgWC contact blank based on three-dimensional framework technical field The present invention relates to the technical field of electrical contact preparation, in particular to a kind of AgWC contact blank based on three-dimensional framework preparation method. Background technique [0002] AgWC material has excellent electrical and thermal conductivity, low current cutoff value and high resistance to arc ablation, so It is used in medium and low voltage vacuum contactors, as contacts in frame circuit breakers. However, due to the lack of solid solution of Ag and WC materials, the phase The wettability of each other is extremely poor, and the inevitable "closed pores" in the WC framework material during the preparation process make the AgWC material The problem of poor infiltration has always existed, and the quality of the prepared AgWC contacts is unstable. For this problem, the current solutions are listed as follows: Patent CN...

AI Technical Summary

Problems solved by technology

However, due to the fact that there is no solid solution between Ag and WC, the wettability between them is extremely poor, and the inevitable "closed pores" in the WC framework material during the preparation process, the problem of poor infiltration of the AgWC material has always existed, and the prepared Unstable quality of AgWC contacts

However, in this patent, there is no force between the WC fibers as toughening materials, so they are randomly distributed in the alloy, that is, there is no strong bond between the WC fibers, and no spatial skeleton structure is formed.

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