Flow Behavior of Ultra-High Strength Boron Steel at Elevated Temperature

Abstract:

Ultra-high strength boron steel is widely used in a new hot stamping technology which is hot formed and die quenched simultaneously in order to obtain stamping parts with 1500MPa tensile strength or higher. Tensile experiments were carried out with ultra-high strength boron steel in a range of temperature 500°C~860°Cand strain rate 0.01/s~1/s with the thermal simulation testing machine Gleeble 3800, and the stress-strain curves were obtained. The influences of the deformation temperature and strain rate on the stress-strain curves were analyzed. The results show that hot behavior at elevated temperature of ultra-high strength boron steel consists of strain hardening and dynamic recovery mechanism, which can be accurately described by the mathematic model. Keywords: Ultra-high strength boron steel, hot stamping, hot flow behavior

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 191-195
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.191
• Online since: December 2011
• Authors: Jun Bao, Hong Sheng Liu, Zhong Wen Xing, Bao Yu Song, Yu Ying Yang
• Keywords: Hot Flow Behavior, Hot Stamping, Ultra-High Strength Boron Steel

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