中南大学学报（自然科学版）2018，Vol.49Issue(4)：817-823,7.DOI:10.11817/j.issn.1672-7207.2018.04.007
超高强度硼钢38MnB5的热冲压工艺研究
Study on hot stamping process of 38MnB5 ultra high strength boron steel
摘要
Abstract
Microstructure and prior austenite grain size of 38MnB5 hot stamping steel were observed and investigated via scanning electron microscopy (SEM) and optical microscope. Mechanical properties were obtained via universal tensile testing machine. Hot stamping steels with different heating temperature and soaking time were performed and the optimal process was confirmed. The results show that the tensile strength increases at first and then decreases with the increase of temperature, peaking at 950℃. The prior austenite grain grows with the increase of soaking time while tensile strength increases at first and then decreases, peaking at 10 min. The 38MnB5 hot stamping steel with the most optimal mechanical properties is obtained at the heating temperature of 950℃ and the soaking time of 10 min. The tensile strength is 2061 MPa, the yield strength is 1421 MPa and the elongation is 7%.关键词
热冲压/38MnB5钢/组织/力学性能Key words
hot stamping/38MnB5 steel/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
郝亮,朱国明,闻玉辉,袁静玺,康永林..超高强度硼钢38MnB5的热冲压工艺研究[J].中南大学学报（自然科学版）,2018,49(4):817-823,7.基金项目
国家自然科学基金资助项目(U1460101) （U1460101）
高等学校博士学科点专项科研基金资助项目(20120006120002) (Project(U1460101) supported by the National Natural Science Foundation of China （20120006120002）
Project(20120006120002) supported by the Specialized Research Fund for Doctoral Program) （20120006120002）
