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Effect of Cold Rolling on Microstructure and Mechanical Properties of AISI 301LN metastable austenitic stainless steels

引用

Journal of Iron and steel Research International 2012年第10期19卷 59-63页

作者： HUANG Jun-xia1, YE Xiao-ning1, XU Zhou2 (1. Shanghai Baosteel Research Institute, Shanghai 200431, China 2. School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) Shanghai Baosteel Research Institute Shanghai China School of Material Science and Engineering Shanghai Iiao Tong University Shanghai China

The microstructure and mechanical properties evolution of AISI 301LN metastable austenitic stainless steels during cold rolling were investigated. A wide range of cold thickness reduction (10%-80%) was carried out in a four-high rolling mill at ambient temperature. The X-ray and Feritscope MP30 were used to identify the strain-induced α′-martensite phase and its volume fraction, respectively. The microstructure was observed by optical micrograph and the mechanical properties were determined by tensile tests and microhardness. The results show that the strain-induced α′-martensite nucleated at the shear bands intersections and the growth of α′-martensite occurred by the repeated nucleation of new embryos. The volume fraction of strain-induced α′-martensite increased with increasing the cold rolling reduction. In addition, the percentage increased in the tensile strength is the same as that of hardness. The ratio between the average tensile strength and the average microhardness was found to range between 2.82 and 3.17.

关键词： metastable austenitic stainless steel cold rolling reduction strength

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