Effect of annealing process on microstructure and mechanical properties of low carbon bainitic steel

doi:10.13251/j.issn.0254-6051.2022.03.010

Abstract

Abstract: Effect of annealing process on microstructure and mechanical properties of a low carbon bainitic steel produced by twin-roll casting and rolling process was studied. The results show that microstructure of the tested steel is granular bainite, which is gradually decomposed after annealing. As the increase of soaking time, the yield strength and tensile strength increase gradually when annealed at 500 ℃ for long time, and the elongation does not change much. After annealing, the increase of strength is caused by NbC precipitation strengthening. The yield strength and tensile strength of the steel reach the maximum when annealed at 650 ℃ for 3 min.

Key words: low carbon bainitic steel, annealing process, microstructure, mechanical properties

CLC Number:

TG156.2

Liu Zhiqiao, Feng Qingxiao, Li Hualong, Li Tengfei. Effect of annealing process on microstructure and mechanical properties of low carbon bainitic steel[J]. Heat Treatment of Metals, 2022, 47(3): 53-56.

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