doi:10.1007/s12613-019-1881-y

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文章导航 > 矿物冶金与材料学报（英文） > 2020 > 27(3): 340-346

Man Liu, Guang Xu, Jun-yu Tian, Qing Yuan, and Xin Chen, Effect of austempering time on microstructure and properties of a low-carbon bainite steel, Int. J. Miner. Metall. Mater., 27(2020), No. 3, pp. 340-346. https://doi.org/10.1007/s12613-019-1881-y

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Man Liu, Guang Xu, Jun-yu Tian, Qing Yuan, and Xin Chen, Effect of austempering time on microstructure and properties of a low-carbon bainite steel, Int. J. Miner. Metall. Mater., 27(2020), No. 3, pp. 340-346. https://doi.org/10.1007/s12613-019-1881-y

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Research Article

Effect of austempering time on microstructure and properties of a low-carbon bainite steel

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Abstract

Abstract

The effect of austempering time after the bainitic transformation on the microstructure and property in a low-carbon bainite steel was investigated by metallography and dilatometry. The results showed that by prolonging the austempering time after the bainite transformation, the amount of large-size martensite/austenite islands decreased, but no significant change of the amount and morphology of bainite were observed. In addition, more austenite with a high carbon content was retained by prolonging the holding time at the bainite transformation temperature. Moreover, with a longer holding time, the elongation was improved at the expense of a small decrease in tensile strength. Finally, the Avrami equation B_RF = 1− exp(−0.0499 × t^0.7616) for bainite reaction at 350°C was obtained for the tested steel. The work provided a reference for tailoring the properties of low-carbon steels.
- austempering time;
- retained austenite;
- martensite/austenite island;
- low-carbon bainite;
- transformation kinetics

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Effect of austempering time on microstructure and properties of a low-carbon bainite steel

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