Transactions of Materials and Heat Treatment

Title：Simulation and optimization on B-pillar reinforcing parts during hot stamping process based on Dynaform

Authors： Liu Xuefei Huang Xinyue Xiang Xiang Wang Menghan

Unit： Chongqing Jiangdong Machinery Co. Ltd. Chongqing University

KeyWords： hot stamping B-pillar martensite orthogonal experiment Dynaform

ClassificationCode：TG306

year,vol(issue):pagenumber：2019,44(6):46-52

Abstract：

In order to study the influences of different process parameters on the forming quality of hot stamping parts for ultra-high strength steel, for B-pillar reinforcing parts, the numerical simulation during the whole process of hot forming, pressure holding and quenching was conducted by Dynaform. Then, the influences of initial blank temperature, initial die temperature, blank holder force and holding time on thickness uniformity, martensite average transformation rate and martensite distribution uniformity of hot stamping parts were analyzed by the orthogonal experiment, and the optimal combination of process parameter was determined with the initial blank temperature of 750 ℃, the initial die temperature of 30 ℃, the blank holder force of 5000 N and the holding time of 15 s. Through simulation verification, the results show that the established quality evaluation standard can effectively guarantee the performance of the product with the optimal combination of process parameters of the thickness uniformity of 0.0491, martensite average transformation rate of 99.92% and the martensite distribution uniformity of 0.0024.

Funds：

工信部强基工程项目（TC160A310-20）

刘雪飞(1986-)，男，硕士，高级工程师 E-mail：lxffesto@163.com 通讯作者：王梦寒(1975-)，女，博士，副教授 E-mail：wmh9792@163.com

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