Transactions of Materials and Heat Treatment

Title：Analysis of stamping performance of A-pillar reinforcement plate for QP980 ultra-high strength steel

Authors： Pei Yongsheng Zhang Shizhe Meng Ning

Unit： Yanshan University China Heavy Truck Group Co Ltd

KeyWords： QP980 ultra-high strength steel stamping the maximum thinning rate wrinkles springback amount

ClassificationCode：TG302

year,vol(issue):pagenumber：2020,45(12):28-33

Abstract：

In order to reduce the weight of automobiles, ultra-high-strength steels has been used in automotive sheet metal parts. Based on QP980 ultra-high-strength steel, the A-pillar reinforcement plate is used to analyze its stamping performance. The UG model was created according to the A-pillar internal reinforcement plate. Next, the stamping process was designed, and the stamping process analysis was carried out. Furthermore, referring to the three standards of the maximum thinning rate, wrinkling criterion and springback amount, the quality of stamping was judged and compared with the situation of DP780 high-strength steel. Using finite element simulation analysis, it is concluded that the maximum thinning rate of the A-pillar reinforcement plate for QP980 ultra-high-strength steel under the action of blank holder force of 1200 kN reaches the standard range, but the wrinkle and springback are larger，and the three standard conditions are worse than DP780 high-strength steel. Then, the QP980 ultra-high strength steel was tested by stamping process under three different blank holder forces, and the test results were inspected. The test results show that the stamping performance of QP980 ultra-high strength steel has a great relationship with the blank holder force.

Funds：

河北省自然科学基金资助项目(E2015203002)；秦皇岛市科学技术研究与发展计划项目(201701B039)

裴永生(1973-)，男，博士，副教授 E-mail：39568353@qqcom 通讯作者: 张世哲(1996-)，男，硕士研究生 E-mail: zhshzh0109@163com

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