Newly Developed Hot Rolled High Strength Steel Sheets and Their Formability 930030
A wider usage of hot rolled high strength steels (HRHSSs) are intensively studied for more complicated underbody structural parts of cars now.
With an emphasis placed on the improvement of sheared-edge flangeability, we have developed new types of HRHSSs ranging from 440N/mm2 to 690N/mm2 in ultimate tensile strength (UTS). The microstructure and chemistry of these steels were controlled: The hard second phase in the polygonal ferrite matrix was controlled both by adjusting the chemical composition, mainly, silicon-content, and by applying thermomechanical treatment to a hot strip mill.
Compared to conventional high strength steels such as a high-carbon, low-silicon steel and a niobium-bearing steel, various formability-performances of the developed steels were found to be good.
Citation: Kunishige, K., Komatsubara, N., Hirose, Y., Sudo, C. et al., "Newly Developed Hot Rolled High Strength Steel Sheets and Their Formability," SAE Technical Paper 930030, 1993, https://doi.org/10.4271/930030. Download Citation
