Transactions of Materials and Heat Treatment

Title：Warm stamping steel and its forming technology for auto security structure parts

Authors： Chen Ying Wang Cunyu Dong Han Cao Wenquan

Unit： East China Branch of Central Iron and Steel Research Institute

KeyWords： warm stamping steel warm stamping auto security structure parts the third generation automobile steel

ClassificationCode：

year,vol(issue):pagenumber：2016,41(7):43-46

Abstract：

For the material of the third generation automotive cold rolled steel 0.1C-5Mn with low austenitizing temperature and high hardenability, the warm stamping auto part was successfully fabricated by the basically identical technological process of hot forming. The result shows that the heating temperature of stamping steel is 100-150 ℃ lower than that of hot stamping. Furthermore, the warm stamping die is simplified, and the cost of warm forming process is reduced and the forming efficiency is improved. Therefore, the dimensional accuracy of warm stamping part is high and the shape is complex. The tensile test of specimens obtained from the warm stamping part is conducted，and the tensile strength is not less than 1.3 GPa and the elongation rate is greater than 12%，which shows better mechanical properties（Especially plasticity）than hot stamped parts produced by steel 22MnB5. The research indicates that the warm stamping steel and its security structure parts can gradually replace or upgrade the traditional 22MnB5 hot stamping parts.

Funds：

高性能钢的组织调控理论与技术基础研究(2010CB630800)

陈鹰（1974-），男，硕士，高级工程师

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