Transactions of Materials and Heat Treatment

Title：Influence of fillet radius on hot stamping springback of V-shaped part for TC4 titanium alloy

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ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(11):53-59

Abstract：

The mechanical properties of TC4 titanium alloy sheet were analyzed by uniaxial tensile test, and the numerical simulation model of hot stamping for V-shaped part of TC4 titanium alloy was established by finite element method. Then, the simulation experiment was conducted, and the influences of forming temperature, punch speed and friction factor on the forming were investigated to obtain the optimum process parameter combination. Under the optimal process condition, the influence of punch fillet radius on the springback was analyzed, and for the V-shaped part of TC4 titanium alloy, the hot stamping tests with different punch fillet radiuses were conducted to obtain the springback data of parts. According to the comparative analysis of experimental and simulation data, it is verified that the simulation results are in good agreement with the experimental results. The results show that the influence of forming temperature on the forming result is greater than that of the punch speed, and the influence of friction factor is the least. Furthermore, the optimum forming condition is as follows: the forming temperature is 750 ℃, the punch speed is 0.1 mm·s-1 and general lubrication. However, when the punch fillet radius increases, the springback rate also increases, when the punch fillet radius is smaller than that of die, the springback angle is negative value, and when the punch fillet radius equals that of die, the springback rate is the minimum.

Funds：

四川省应用基础研究项目(2019YJ0519)；四川省科技厅项目（18ZB0050)

岳太文（1982-），男，硕士，讲师 E-mail：yuetaiwen@qq.com

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