本文用X射线衍射仪测定了激光处理灰铸铁硬化层内的残余奥氏体分布以及磨损过程中残余奥氏体量的变化;对硬化层磨面表层金属薄膜进行了电子显微镜观察。结果表明,硬化层中的残余奥氏休在1.72MPa载荷下的滑动磨损过程中,应变诱发出两种形态的马氏体,应变诱发马氏体对滑动磨损抗力有利。
The distribution of residual austenite in the laser hardening layer ofthe gray cast iron and the change in amount of residual austenite during slidingwearing have been investigated by X-ray diffractometer. The thin foils of the hard-ening layer worn down have been observed by electron microscopy. It was reveal-ed that two types of martensite are strain-induced by sliding wearing under loadof 1.72 MPa on the hardening layer of residual austenite. The strain-induced mar-tensite is profitable to improve the sliding wearing resistance.
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