材料期刊网

RESIDUAL AUSTENITE AND STRAIN-INDUCED MARTENSITE IN LASER HARDENING LAYER ON GRAY IRON

LI Chenglao SHEN Lian Xi'an Jiaotong University , Xi'an , China LI Chenglao Lecturer Dept.of Material Engineering , Xi'an Jiaotong University , Xi'an 710049 , China

金属学报(英文版)

The distribution of residual austenite in the laser hardening laver on the gray cast iron and the change in the amount of residual austenite during sliding wearing have been investigated by X-ray diffractometer.The thin foils of the hardening layer worn down have been observed by electron microscopy.It was revealed that two types of martensite are strain-induced by slid- ing wearing under load of 1.72 MPa on the hardening layer of residual austenite.The strain induced martensite is profitable to improve the sliding wearing resistance.

关键词: laser surface modification , null , null , null , null