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Erschienen in: Journal of Iron and Steel Research International 8/2019

03.04.2019 | Original Paper

Effects of Al addition on bainite transformation and properties of high-strength carbide-free bainitic steels

verfasst von: Jun-yu Tian, Guang Xu, Ming-xing Zhou, Hai-jiang Hu, Zheng-liang Xue

Erschienen in: Journal of Iron and Steel Research International | Ausgabe 8/2019

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Abstract

The effects of aluminum addition on bainite transformation and properties of carbide-free bainitic steels containing 0.22 wt.% carbon were investigated by two different types of heat treatment processes: continuous cooling process (CCP) and isothermal transformation process (ITP). The results indicate that for the CCP treatment, Al addition significantly promoted the ferrite and bainite transformation; however, it did not significantly increase the product of tensile strength and total elongation (PSE). For the ITP treatment, Al addition significantly promoted the kinetics of bainite transformation, and thus, more bainite was formed with Al addition; however, it was found that Al addition resulted in a decrease in tensile strength and an increase in elongation of the tested bainitic steels. Moreover, the effects of Al addition on comprehensive property were profoundly dependent on austempering temperatures. When the austempering temperature was higher (430 °C), PSE significantly increased with Al addition, whereas it decreased at the lower austempering temperature (400 °C). Therefore, it can be concluded that the effects of Al on properties of bainitic steels were more significant at higher austempering temperatures.
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Metadaten
Titel
Effects of Al addition on bainite transformation and properties of high-strength carbide-free bainitic steels
verfasst von
Jun-yu Tian
Guang Xu
Ming-xing Zhou
Hai-jiang Hu
Zheng-liang Xue
Publikationsdatum
03.04.2019
Verlag
Springer Singapore
Erschienen in
Journal of Iron and Steel Research International / Ausgabe 8/2019
Print ISSN: 1006-706X
Elektronische ISSN: 2210-3988
DOI
https://doi.org/10.1007/s42243-019-00253-7

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