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Ironmaking & Steelmaking
Processes, Products and Applications
Volume 48, 2021 - Issue 9
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Articles

Continuous cooling transformation behaviour of 30CrMo steel simulated by CSP process

Zhixiang Fua Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Gengwei Yanga Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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Yaowen Xua Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Ruyang Hana Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Qilong Yina Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Siqian Baoa Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Gang Zhaoa Hubei Provincial Key Laboratory for New Processes of Iron making and Steel making, Wuhan University of Science and Technology, Wuhan, People’s Republic of China;b The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, People’s Republic of ChinaView further author information
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Pages 1094-1101 | Received 28 Feb 2021, Accepted 22 Apr 2021, Published online: 20 May 2021
 
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ABSTRACT

The continuous cooling transformation (CCT) diagram of 30CrMo steel simulated by compact strip production process was constructed. And the effect of austenite deformation on the CCT behaviour was investigated. The results showed that the microstructure gradually transformed from proeutectoid ferrite and pearlite to bainite and martensite with the increase of cooling rate, accompanying a refined microstructure and an increasing hardness. When the cooling rate was lower than 0.1°C s−1, the desired microstructure of ferrite and pearlite could be obtained. And the austenite deformation strongly promoted the formation of proeutectoid ferrite, which led to a decreasing hardness of deformed steel. When the cooling rate was larger than 10°C s−1, the fully martensite microstructure was obtained. And the austenite deformation inhibited martensite transformation, resulting in a decrease of the martensite transformation starting (Ms) temperature from 391°C to 368°C.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Key Research and Development Program of China [grant number 2017YFB0305100], Key Research and Development Program of Hubei Province [grant number 2020BAB057] and Natural Science Foundation and Major Technology Innovation of Hubei Province [grant number 2017AAA113].

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