Study on hot stamping process of 38MnB5 ultra high strength boron steel

被引：1

作者：

Hao L. ^{[1
]}

Zhu G. ^{[1
]}

Wen Y. ^{[1
]}

Yuan J. ^{[1
]}

Kang Y. ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing

[2] State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2018年 / 49卷 / 04期

基金：

中国国家自然科学基金;

关键词：

38MnB5; steel; Hot stamping; Mechanical property; Microstructure;

D O I：

10.11817/j.issn.1672-7207.2018.04.007

中图分类号：

学科分类号：

摘要：

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 2 061 MPa, the yield strength is 1 421 MPa and the elongation is 7%. © 2018, Central South University Press. All right reserved.

引用

页码：817 / 823

页数：6

共 14 条

[1] Wang Z., Study of development of reduce the weight of automotive, Automobile Technology & Material, 2, pp. 1-5, (2009)
[2] Tang J., New energy automobile lightweight materials, The Journal of New Industrialization, 6, 1, pp. 1-14, (2016)
[3] Turetta A., Bruschi S., Ghiotti A., Investigation of 22MnB5 formability in hot stamping operations, Journal of Materials Processing Technology, 177, 1, pp. 396-400, (2006)
[4] Yan Z., Han X., Hao X., Et al., Experimental study on thermodynamic performance of boron steel B1500HS used for hot stamping process, Journal of Plasticity Engineering, 20, 3, pp. 97-101, (2013)
[5] Jin H., Zhao A., Chen Y., Et al., Effect of titanum on microstructure and properties of hot stamp-formed steels containing boron, Materials for Mechanical Engineering, 8, pp. 6-9, (2012)
[6] Huang M., Wang B., Li X., Et al., Microstructure simulation and mechanical property prediction of boron steel during hot stamping, Chinese Journal of Engineering, 7, pp. 913-918, (2015)
[7] Zhang S., Huang Y., Sun B., Et al., Effect of Nb on hydrogen-induced delayed fracture in high strength hot stamping steels, Materials Science and Engineering A, 626, pp. 136-143, (2015)
[8] Taylor T., Fourlaris G., Evans P., Et al., New generation ultrahigh strength boron steel for automotive hot stamping technologies, Materials Science and Technology, 30, 7, pp. 818-826, (2014)
[9] Jiang C., Shan Z., Zhuang B., Et al., Microstructure and properties of hot stamping 22MnB5 steel, Transactions of Materials and Heat Treatment, 33, 3, pp. 78-81, (2012)
[10] Dai Q., The principle of metal microstructure control, pp. 3-5, (2009)

← 1 2 →