Transactions of Materials and Heat Treatment

Title：Thermal deformation behavior on stainless steel containing bismuth

Authors： Deng Qingwen1 Zuo Changbing1 Zhang Junni1 Xiao Lin2 Li Lixin2 Hu Shengde2

Unit： 1.Hubei Tri-Ring Forging Co. Ltd. 2.Faculty of Materials Wuhan University of Science and Technology

KeyWords： stainless steel containing bismuth thermal processing map thermoplastic deformation friction force error correction

ClassificationCode：TG142

year,vol(issue):pagenumber：2023,48(12):233-241

Abstract：

Aiming at the problem that stainless steel materials containing bismuth are prone to cracks during the thermal processing, thermal compression experiments were carried out to obtain the true stress-true strain curves of stainless steel materials containing bismuth. Considering the thermoplastic deformation and the temperature and stress changes of sample caused by the friction between sample and tool, the true stress-true strain curve was corrected to eliminate the experimental errors caused by thermoplastic deformation and friction. Furthermore, based on the dynamic material model (DMM) and Murty criterion, a thermal processing map of free-cutting austenitic stainless steel was established, and the stable and unstable areas of thermal processing for free-cutting austenitic stainless steel were given. The process parameters for the stable area were selected for on-site rolling. The rolling experiment shows that under the selected stable area conditions, no cracks occur in the cross section of the rolled piece.

Funds：

材料成形与模具技术国家重点实验室开放基金（P2020-020）

作者简介：邓庆文（1975-），男，本科，高级工程师 E-mail：dqw096@foxmail.com

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