Transactions of Materials and Heat Treatment

Title：Influence of anisotropy for ultra-deep drawing IF steel on stamping of front door inner panel

Authors： Huang Xinghong Liu Chonglin Chen Yongjun Li Xide Wu Junyuan Liu Fuxin

Unit： Guangxi Liuzhou Iron and Steel Group Co． Ltd． Liuzhou 545002 China

KeyWords： anisotropy IF steel stamping plastic strain ratio blank angle

ClassificationCode：TG386

year,vol(issue):pagenumber：2025,50(6):69-77

Abstract：

For the automobile front door inner panel, taking the maximum thinning rate and the maximum failure value as the evaluation indicators, the simulation analysis was conducted by using finite element simulation software Autoform and changing the material parameter conditions to explore the influences of weighted average value of plastic strain ratio r , anisotropy of plastic strain ratio Δr and blanking angle θ of ultra-deep drawing steel DC05 on the stamping performance. Then, the physical object test results were compared with the numerical calculation results to verify the reliability of the method. The results show that compared with Δr, r is the main factor determining the formability of ultra-deep drawing steel. When r remains constant, Δr has a significant effect on the stamping formability of materials, and the formability first decreases and then increases with the increasing of Δr. When Δr is 0.3-0.8, the formability of the material is not good, and the formability of the material is the worst when Δr=0.5. Therefore, Δr of the material should be controlled below 0.3 as much as possible, the larger the Δr, the more significant the influence of stamping angle θ on the formability, and the formability is proportional to plastic strain ratio rθ in the corresponding direction, and the formability is the worst in the direction with smallest rθ.

Funds：

广西科技重大专项(桂科AA22068079)

作者简介：黄兴鸿（1995-），男，硕士，助理工程师,E-mail：hongzi7350@163.com;通信作者：刘崇林（1983-），男，博士，高级工程师,E-mail：liuchonglin2003@163.com

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