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首页> 外文期刊>鉄と鋼／Journal of the Iron and Steel Institute of Japan. >Formation of Retained Austenite and Effect of Retained Austenite on Elongation in Low Carbon Hot-Rolled High Strength Steels
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Formation of Retained Austenite and Effect of Retained Austenite on Elongation in Low Carbon Hot-Rolled High Strength Steels

机译：低碳热轧高强度钢中残余奥氏体的形成及残余奥氏体对延伸率的影响

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摘要

Austenite stabilization behavior and effect of retained austenite on elongation of Fe-0.2 percentC-1.5 percentSi-1.5 approx 1.7 percent Mn hot-rolled high strength steels were investigated in the mill-scale test. The results are as follows;(1) A large amount of retained austenite (maximum approx =15 vol percent) remained in steels as-hot-rolled.(2) The two metallurgical processes (ferrite transformation and bainite transformation) ate important for the austenite stabilization. Especially ferrite transformation plays an important role to obtain retained austenite in 0.2 percent C steels. The volume fraction of retained austenite is in proportion to V_PF/d_PF (V_PF; volume fraction of polygonal ferrite, d_PF; grain diameter of polygonal ferrite).(3) TS x T.El value increases with the volume fraction of retained austenite. It is to be noted that the TS x T.El values of 25000 approx 30000 MPa centre dot percent were obtained, which are higher than those of conventional steels.TS x T.El value was improved by increasing of the plastic stability of retained austenite.
机译：在轧机规模试验中研究了奥氏体稳定行为和残余奥氏体对Fe-0.2％C-1.5％Si-1.5约1.7％Mn热轧高强度钢的延伸率的影响。结果如下：（1）热轧钢中残留大量残余奥氏体（最大约15 vol％）。（2）两种冶金工艺（铁素体相变和贝氏体相变）对于保持热轧非常重要。奥氏体稳定化。尤其是铁素体相变对于在0.2％C的钢中获得残留奥氏体起着重要作用。残余奥氏体的体积分数与V_PF / d_PF成正比（V_PF;多边形铁素体的体积分数d_PF;多边形铁素体的粒径）。（3）TS x T.E1值随残余奥氏体的体积分数而增加。值得注意的是，获得的TS x T.El值为25000约30000 MPa中心点百分比，高于常规钢的TS x T.El值。通过提高残余奥氏体的塑性稳定性来改善TS x T.El值。

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