Transactions of Materials and Heat Treatment

Title：Hot deformation behavior and processing map of austenite stainless steel 304

Authors： Liao Xiping Xie Qijun Hu Chengliang Zhao Zhen

Unit： Shanghai Jiao Tong University Shanghai Winkelmann Longchuan (SWL) Motorcomponents Co. Ltd.

KeyWords： austenite stainless steel 304 hot compression constitutive equation processing map microstructure evaluation

ClassificationCode：TG142.71

year,vol(issue):pagenumber：2017,42(12):150-156

Abstract：

The uniaxial hot compress experiments of austenite stainless steel 304 with strain rate of 0.1-10 s-1 and temperature range of 850-1200 ℃ were carried out by Gleebe-1500 thermal mechanical simulation machine. Based on the experimental data, the flow stress of austenite stainless steel 304 has a significant influence on the change of temperature and strain rate, the greater the strain rate is, the lower the deformation temperature and the greater the flow stress are. Then, the constitutive equation was deduced by Arrhenius mode to calculate the activation energy of heat forming for austenite stainless steel 304 which was 486.0 kJ·mol-1, and the hot processing map was established under the true strain of 0.7. The analysis of microstructure shows that the dynamic recrystallization happens with the temperature range of 1025-1200 ℃, the strain rate range of 0.1-0.8 s-1 and the efficiency of power dissipation over 26%, which are the optimum technology parameters for austenite stainless steel 304.

Funds：

国家自然科学基金资助项目（51475294）

作者简介：廖喜平（1992-），男，硕士研究生 E-mail：Simon-liao@sjtu.edu.cn 通讯作者：胡成亮（1980-），男，博士，副研究员 E-mail：clhu@sjtu.edu.cn

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