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RESIDUAL AUSTENITE AND STRAIN-INDUCED MARTENSITE IN LASER HARDENING LAYER ON GRAY CAST IRON |
LI Chenglao;SHEN Lian Xi'an Jiaotong University Li Chenglao; Department of Material Engineering; Xi'an Jiaotong University;Xi'an 710049 |
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Cite this article:
LI Chenglao;SHEN Lian Xi'an Jiaotong University Li Chenglao; Department of Material Engineering; Xi'an Jiaotong University;Xi'an 710049. RESIDUAL AUSTENITE AND STRAIN-INDUCED MARTENSITE IN LASER HARDENING LAYER ON GRAY CAST IRON. Acta Metall Sin, 1989, 25(6): 74-77.
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Abstract 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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Received: 18 June 1989
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1 Belfote D. In: Ready J E ed, Lasers in Modern Industry, Dearborn MI: Society of Manufacturing Engineers, 1979: 128 2 Chen C H, Altstetter C J, Rigsbee J M. Metall Trans, 1984; 15A: 719 3 Dash S, Brown N. Acta Metall, 1966; 14: 595 4 徐祖耀.马氏体相变与马氏体,北京:科学出版社,1980:421 5 Maxwell P C, Goldberg A, Shyne J C. Metall Trans, 1974; 5: 1319$ |
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