Forming Response of Ultra High Strength Steel Sheet to Stamping Speed during Hot Forming

Abstract:

Stamping speed is an important parameter in sheet metal forming especially in hot forming. In this study, hot forming of a U-shaped part made of ultra high strength boron steel (22MnB5) sheet is simulated with solid elements. The mechanical properties of 22MnB5 steel sheet and the key process parameters are introduced in detail. Emphasis is laid on the forming response of the boron steel sheet to stamping speeds of 3.25m/s, 0.325m/s and 0.0325m/s. The mechanism of stamping speed acting on hot formability and temperature field of the stamped part is analyzed. It is demonstrated that stamping speed affects both formability and the heat transferred from blank to tools and to environment during hot forming. And the coupling effect of material properties, the heat produced during plastic deformation and heat boundary condition decides the formability and temperature field. An appropriate stamping speed is more important for hot forming than that for common cold forming.

• Periodical: Advanced Materials Research (Volumes 160-162)
• Pages: 123-129
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.160-162.123
• Online since: November 2010
• Authors: Hai Yan Yu, Li Bao, You Zhi Deng, Wei Cao
• Keywords: Forming Response, Hot-Forming, Stamping Speed, Ultra High-Strength Steel

References

[1] T.B. Hilditch, J.G. Speer, D.K. Matlock: J Mater. Proce. Techn., Vol. 182(1-3)(2007), p.84.

[2] Ti-Kun Shan, Wei-Gang Zhang, Shu-Hui Li: J Plasticity Engineering, Vol. 15(4)(2008), pp.19-23, in Chinese.

[3] K. Mori, S. Saito, S. Maki: CIRP Annals-Manufacturing Technology. Vol. 57 (2008), p.321.

[4] R. Kolleck, R. Veit, M. Merklein, J. Lechler, M. Geiger : CIRP Annals - Manufacturing Technology, Vol. 58(1) (2009), p.275.

DOI: 10.1016/j.cirp.2009.03.090

[5] Myoung-Gyu Lee, Sung-Joon Kim, Heung Nam Han, Woo Chang Jeong : Intern. J. Mechanical Sci., Vol. 51(11-12) (2009), p.888.

[6] Jeong-Hwan JANG, Jae-Ho LEE, Byeong-Don JOO, Young-Hoon MOON. Trans. Nonferrous Metals Society of China, Vol. 19(4)(2009), p.913.

[7] M. Merklein, J. Lechler, M. Geiger：CIRP Annals-Manufacturing Technology, Vol. 55(1)(2006), p.229.

[8] Alexander Bardelcik, Christopher P. Salisbury, Sooky Winkler, Mary A. Wells, Michael J. Worswick.: Intern. J. Impact Engin., Vol. 37(6)(2010), p.694.

[9] Information on http: /www. arcelormittal. com/automotive/sheets.

[10] Múnera, Daniel Duque; Pic, Aurélien; Abou-Khalil, Damien; et al. : SAE Intern. J Mater. Manufactur. Vol. 1(1)(2009), p.472.

[11] B. Oberpriller, L. Burkhardt, B. Griesbach: Numisheet 2008, 7th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes. Interlaken, Switzerland(2008).

[12] R.E. Cowper, P.S. Symonds. Brown University, Applied Mathematics Report, (1958).

[13] Arthur. Shapiro: Steel Res. Intern., Vol. 80(9) (2009), p.658.

[14] Arthur. Shapiro: 7th European LS-DYNA Conference. Livermore, CA, USA, May (2009).

[15] Zhao Zhennan. Heat Transfer. Beijing: High Education Press. 2002(in Chinese).