Transactions of Materials and Heat Treatment

Title：Hot stamping forming limit of ultra high strength steel

Authors： Wu Bin Wang Zhenhua Shan Yun

Unit： Wuxi Institute of Technology

KeyWords： FLD ultra-high strength steel hot stamping bulging experiment forming limit

ClassificationCode：TG142.41

year,vol(issue):pagenumber：2016,41(8):29-34

Abstract：

The ultra high strength steel as a kind of lightweight material is widely used in hot stamping, and it is important to research its mechanical properties at high temperature. First, the bulging experiment was conducted to study the forming limit curves (FLD) of ultra-high strength steel B1500HS at room temperature, 700 ℃, 800 ℃ respectively. At the same time, the nonlinear and linear calculating models were built to predict the FLDs at various temperatures. The results show that the dual pull area data points are expanded by changing lubrication conditions at room temperature, while at high temperature the data points in dual pull area are less and lacking equivalent pull data points. The nonlinear calculating model is more stable and accurate than linear calculating model, and the equivalent pull area points are obtained by changing the friction factor at high temperature in simulation.

Funds：

国家自然科学基金资助项目（51165021）；江苏高校品牌专业江苏项目（PPZY2015A086）

吴斌（1972-），男，硕士，副教授

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