Effect of Pre-Heating Temperature on Microstructure and Properties of 22MnB5 Steel Hot Stamping

Abstract:

The hot stamping process of ultra high strength steel(UHSS) sheet is an innovative way to manufacture the components with a ultra high tensile strength. The sufficiency of martensitic transformation in formed component is affected by pre-heating temperature of blank directly. In this paper, experiments of heating UHSS blanks to 700°C, 800°C, 900°C and 1000°C were implemented to investigate the effect of pre-heating temperature on the formed component’s microstructure and mechanical properties. The results indicate that 900°C is the best pre-heating temperature for hot stamping process. The microstructure of formed component is all fine and uniform martensite. Meanwhile, tensile strength and vickers hardness raise up to 1580MPa and 450HV, respectively.

• Periodical: Advanced Materials Research (Volume 1063)
• Pages: 108-111
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1063.108
• Online since: December 2014
• Authors: Ping Li, Yu Sheng Liu, Tian Zong Gongzi, Ke Min Xue*
• Keywords: 22MnB5, Hot Stamping, Microstructure, Pre-Heating Temperature

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