Preparation method of novel binding-phase hard alloy material

Abstract

The invention discloses a preparation method of a novel binding-phase hard alloy material. The preparation method is characterized by comprising the following steps of firstly, preparing a five-element amorphous binding-phase powder (Fe:Ni:Co:Cu:Cr (iron:nickel:cobalt:copper:chromium)=1:1:1:(0.4 to 0.6):(0.2 to 0.4):(0.2 to 0.4)) by intermittent type stirring and ball milling equipment; then, mixing the five-element amorphous binding-phase powder and a hard-phase powder; adding a forming agent, pressing into a blank, and dewaxing at low temperature, so as to prepare a forming agent-removed blank of which the binding phase is still the amorphous state; finally, adopting a microwave sintering technology with steps of quickly heating at the rate of 30 to 50 DEG C / min, warming for 10 to 30minat the temperature of 1400 to 1500 DEG C, and quickly cooling, so as to crystallize the amorphous-state binding phase, and inhibit the dissolving from the hard phase to the binding phase, thereby finally obtaining the novel binding-phase hard alloy which uses high-entropy alloy with a face-centered cubic structure as the binding phase. The preparation method solves the problems of lower relative content and lack of mechanical property of hard alloy due to dissolving of WC hard phase in the binding phase in the existing complicated multi-element alloying binding-phase hard alloy, and can be used for preparing hard alloy materials in the fields of cutting tools, wearing parts, national defense and military tools, and the like.

Description

technical field [0001] The invention relates to a method for preparing hard alloy materials, in particular to a method for preparing hard alloy with a new bonding phase, and belongs to the field of hard materials. Background technique [0002] Cemented carbide is a multi-phase solid material with high hardness and high wear resistance, which is based on refractory metal carbides such as WC and TiC, with Co and other iron group metals as binders, and is manufactured by powder metallurgy. Cemented carbide is widely used in machinery manufacturing, geological and mining tools, construction water conservancy, national defense and military industry, etc. However, as the service conditions become more and more severe, the traditional Co bonded cemented carbide is becoming more and more difficult to meet the demand. Binder phases are increasingly being used. [0003] At present, the cemented carbide industry mostly uses complex multi-element alloying of the binder phase to improve...

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Problems solved by technology

[0005] The present invention aims at the problem that the binder phase composition in multi-component complex alloying process is difficult to maintain and the relative content of hard phase is reduced when preparing new binder phase cemented carbide, and proposes a new binder phase based on high-entropy alloy binder phase. Preparation method of junction cemented carbide

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