Ferrite Transformation and Mechanical Properties of Medium Manganese Steels

摘要：

　　Microstructure evolution and change in mechanical properties in 4Mn-0.1C(-2Si) and 5Mn-0.1C(-2Si) medium manganese steels were studied.It was found that austenite to ferrite transformation of the medium Mn steels was quite slow and they showed mostly martensitic microstructures even after slow cooling from austenite.On the other hand,deformation of austenite greatly accelerated the ferrite transformation to result in ferrite and martensite dual phase (DP) structures.The 4Mn-0.1C steel having the DP structure showed good mechanical properties in tensile test,with tensile strength of 1180 MPa and total elongation of 22%.Intercritical annealing in ferrite and austenite two-phase region stabilized some portion of austenite at room temperature.

关键词： medium manganese steel dual phase steel ferrite transformation ultrafine grains

作者: ITO Atsushi MATSUI Yo-ichiro BAI Yu SHIBATA Akinobu TSUJI Nobuhiro

作者单位: Department of Materials Science and Engineering,Kyoto University,Yoshida Honmachi, Sakyou-ku, Kyoto, Department of Materials Science and Engineering,Kyoto University,Yoshida Honmachi, Sakyou-ku, Kyoto,

会议类型: 国际会议

会议名称: the 1st International Conference on Automobile Steel & The 3rd International Conference on High Manganese Steels (第一届国际汽车用钢大会暨第三届高锰钢国际会议)

会议地点: 成都

会议语种:英文

页码: 123-126

在线出版日期: 2016-11-16（万方平台首次上网日期，不代表论文的发表时间）