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本文研究了GJW50WC-钢复合材料(配料成分重量％:WC50、C 0.25、Cr 0.50、Mo 0.25、Fe余量)不同热处理状态下的性能、组织及断口。结果表明:高温淬火、等温淬火均能提高其强韧性,回火温度亦对强韧性产生一定影响。影响WC-钢复合材料强韧性的微观因素除了WC颗粒的数量、形状、大小及分布外,还有残余奥氏体量;未溶碳化物质点的数量及大小;回火及等温组织中析出碳化物的形状、大小及分布;马氏体、贝氏体及铁素体的强度和塑性。不能通过热处理大幅度提高此类材料的强韧性。此外,由于WC与基体的相互溶解,也不利于获得强韧的组织状态。
In this paper, the properties, microstructure and fracture of GJW50WC-steel composites (weight fraction ingredients: WC50, C 0.25, Cr 0.50, Mo 0.25, Fe balance) were studied. The results show that the high temperature quenching and the isothermal quenching can both improve the toughness and the tempering temperature also has a certain impact on the toughness. In addition to the number, shape, size and distribution of WC particles, the amount of retained austenite, the number and size of undissolved carbide particles, the precipitation and carbonization in tempering and isothermal tissues Shape, size and distribution of objects; strength and ductility of martensite, bainite and ferrite. The toughness of such materials can not be drastically increased by heat treatment. In addition, due to the mutual dissolution of the WC and the matrix, it is not conducive to obtaining a tough tissue state.