Effect of Intercritical Quenching Temperature on the Microstructure and Performance of 650 MPa Low-Carbon Structural Steel

Abstract:

The effect of intercritical quenching temperature on the microstructure and performance of a 650 MPa low-carbon structural steel was investigated by optical microscope and mechanical test. The results showed that the obtained microstructures at different temperature were mainly bainites, the volume fraction of the bainites was gradually increased and the size of which became finer with the increase of the quenching temperature. Moreover, as the temperature increased, the yield strength and tensile strength gradually increased; the yield ratio decreased initially and then increased; the impact energy increased among the temperature range of T3°C and T4°C, subsequently dropped significantly at T5°C, and then increased atT6°C. The best comprehensive performance was obtained at T4°C in this study.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 329-332
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.329
• Online since: December 2012
• Authors: Hai He Luo, De Hui Zou, Han Xiong Dong, Zhong Bo Dong
• Keywords: Intercritical Quenching Temperature, Low-Carbon Structural Steel, Mechanical Property, Microstructure

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