Non-Uniform Contact and Friction Sensitivity on Formability of Boron Steel in Hot Stamping Process

Abstract:

Hot stamping parts made of boron steel have been widely used in automotive industry. In forming process of a hot-stamped vehicle bumper, non-uniform contact and friction between the boron steel and tools caused the bumper groove sidewalls excessive thinning or crack. Increasing stamping speed could improve the non-uniformity of blank temperature field and reduce the temperature difference. Influence of the stamping speed and the friction on the forming quality were studied by numerical simulation. The results showed that increasing the stamping speed within a certain range or using reasonable lubrication could reduce the thickness reduction of the sidewall. A bumper without cracking was obtained with a high stamping speed of 300 mm/s and a certain lubrication method.

• Periodical: Advanced Materials Research (Volume 1063)
• Pages: 198-201
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1063.198
• Online since: December 2014
• Authors: Yong Liu, Zhong Xiang Gui, Zhi Gao Huang, Yi Lin Wang, Yi Sheng Zhang*
• Keywords: Friction, Hot Stamping, Non-Uniform Contact, Numerical Simulation, Stamping Speed

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