Transactions of Materials and Heat Treatment

Title：Simulation study on hot stamping process of ultra high strength steel

Authors： Zou Wei Zhang Liqiang Zan Zhiwei Liu Canjun

Unit： Hunan Financial & Industrial Vocationnal-Technical College Central South University of Forestry and Technology

KeyWords： hot stamping ultra high strength steel FE simulation boundary condition mechanical properties

ClassificationCode：TG385

year,vol(issue):pagenumber：2018,43(8):75-79

Abstract：

The material model of the hot stamping process was firstly set up based on experimental data of mechanics and thermal physical properties, and the boundary condition of the hot stamping simulation was determined effectively by analyzing the characteristics of heat transfer and friction coefficient at the interface between blank and die. Then, the whole hot stamping process was simulated by software LS-DYNA, and the forming state and temperature distribution at different time in the hot stamping process and the temperature variation with time in different positions of blank were analyzed. Finally, the mechanical properties of blank after hot stamping were tested and analyzed. It is found that the mechanical properties of hot stamping parts show an inhomogeneous phenomenon due to the influence of cooling condition at the blank/die interface, and the sidewall of part has a higher tensile strength and yield strength compared with other locations. At the same time, this phenomenon is in good agreement with experimental results.

Funds：

湖南省自然科学基金资助项目(2018JJ2681)

邹伟(1991-)，男，硕士研究生，E-mail：429606865@qq.com；通讯作者：张立强(1978-)，男，博士，副教授，E-mail：21384881@qq.com

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