新型铸造WC颗粒复合耐磨材料的研究

新型铸造WC颗粒复合耐磨材料中的金属基体采用多元合金化，用氧-乙炔焰进行堆焊。研究了该材料的显微组织和相组成并测定了材料的宏观硬度和显微硬度。在两种不同的磨损条件下，测定材料的磨料磨损耐磨性，并分析了其磨损机制，研究结果表明，新型铸造WC颗粒复合材料的金属基体组织细化了，其中含有一定量M7C3型碳化物，使金属基体具有较高硬度。在两种磨损条件下，新型复合材料的耐磨性均明显高于常用的D35－4及YZ－4材料的耐磨性，在两体磨料损磨时，金属基体的磨损方式主要是显微切削，铸造WC颗粒的磨损则是脆性显微剥落。

A STUDY ON NEW TYPE COMPLEX WEAR RESISTANT MATERIAL CONTAINING CAST WC GRANULES

The metal matrix in a new type of complex wear resistant material containing cast WC granules was alloyed by way ofmultielement. The material was made by a oxygen-acetylene welding. The microstructures and phase components of the ma-terial were studied, as well as their macrohardness and microshardness measured. under two kinds of wear conditions, theabrasive wear resistance of the material was determined amd the wear mechanism cmalvsed. The rcsults show that the mi-crostructure of the metal matrix in the complex materlal is refined and there is a carbide of M7C3 type in it,which makes themetal matrix has possessed high hardness. Under both wear conditions,the wear resistances of the complex material havemarkedly been higher than D35-4 and YZ-4 which are generally used. In two body wear,the wear loss of thc rnetal matrixis mainly caused by microcutting and the wear mode of the cast WC granules is brittle micropeeling.