Prediction of part shape and associated material properties in hot-press forming using Unite element analysis

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Kim, Hwigeon^1 ; Ha, Jinjin^2 ; Lee, Myoung-Gyu^3 ; Barlat, Frederic^1

Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang

790-784, Korea, Republic of^1

Mechanical Engineering Department, University of New Hampshire, Durham

NH

03824, United States^2

Department of Materials Science and Engineering, Korea University, Seoul

136-713, Korea, Republic of^3

关键词: Austenite deformations;    Boron steels;    Cooling temperature;    Element analysis;    Hot press forming;    Metallurgical model;    Quenching process;    Thermo-mechanical;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032024/pdf
DOI  :  10.1088/1742-6596/734/3/032024

来源: IOP

【 摘 要 】

The hot-press forming of a U-channel was conducted on a boron-steel blank. The die consisted of two separate parts in order to perform the partial quenching process. The cold die was initially at 25 °C while the heated die was set to five different temperatures, namely, 25, 120, 220, 320 and 400 °C. The cooling temperature history, Vickers hardness and springback of the channel were measured. A thermo-mechanical-metallurgical model, which accounts for the prior austenite deformation effect, was successfully implemented in the LS-DYNA explicit solver to simulate the hot-press forming process under partial quenching conditions. The predicted and experimental results were compared and found in reasonable agreement.