Microstructure and Mechanical Properties of Ferritic Rolling Low Carbon Steel

Abstract:

The microstructure and mechanical properties of ferritic rolling low carbon steel are investigated by metallurgical microscope, thermal simulation testing machine, electron backscattered diffraction (EBSD) and universal tensile test machine. The finishing temperature of the transition from austenite to ferrite changed from 680°C to740 °C with different cooling rates, which was obvious lower than that of the interstitial free steel. The deformation stress of low carbon steel was larger than that of interstitial free steel. In addition, the deformation stress of the low carbon steel was more sensitive to the deformation rate than that of the interstitial free steel. The microstructure at the surface layer of the hot rolling plate was composed of fully recrystallized grains while the microstructure in the center was composed of fibrous deformed grains. The ferritic rolling low carbon steel has lower yield ratio and higher elongation than that of normal rolling low carbon steel.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 278-282
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.278
• Online since: January 2019
• Authors: Hu Zhao*, Peng Fei Cheng, Xun Zhou
• Keywords: Ferritic Rolling, Low Carbon Steel, Microstructure, Phase Transformation, Yield Ratio

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