采煤机行走轮失效机理分析及改进

ccording to the physical metallographic report provided by xi'an Coal Mining Machinery Plant China，there is analysis on the coal mining machine wheel failure mechanism of metallographic organization. The materials of the coal mining machine's wheel is 18Cr2Ni4WA which is carburizing carbon steels containing alloy elements more.The correct heat treatment can make the heart of workpiece with sufficient strength and toughness，surface hardness and high wear resistance, and increase the fatigue strength of workpiece, which has good comprehensive mechanical properties.At last,the two improved methods of wheel were put forward based on the coal mining machine working environment.