Investigation on the effects of V and Ti on continuous cooling transformation behaviour of weathering steel

Cui Kaiyu; Li Zhengrong; Zhao Zhengzhi; Ye Xiaoyu; Wang Chuangwei; Zhang Kaihua; Hu Yunfeng; Xiong Xuegang

doi:10.7513/j.issn.1004-7638.2022.03.021

Volume 43 Issue 3

Jun. 2022

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Cui Kaiyu, Li Zhengrong, Zhao Zhengzhi, Ye Xiaoyu, Wang Chuangwei, Zhang Kaihua, Hu Yunfeng, Xiong Xuegang. Investigation on the effects of V and Ti on continuous cooling transformation behaviour of weathering steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 132-138. doi: 10.7513/j.issn.1004-7638.2022.03.021

Citation:

Cui Kaiyu, Li Zhengrong, Zhao Zhengzhi, Ye Xiaoyu, Wang Chuangwei, Zhang Kaihua, Hu Yunfeng, Xiong Xuegang. Investigation on the effects of V and Ti on continuous cooling transformation behaviour of weathering steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 132-138. doi: 10.7513/j.issn.1004-7638.2022.03.021

Citation:

Cui Kaiyu, Li Zhengrong, Zhao Zhengzhi, Ye Xiaoyu, Wang Chuangwei, Zhang Kaihua, Hu Yunfeng, Xiong Xuegang. Investigation on the effects of V and Ti on continuous cooling transformation behaviour of weathering steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 132-138. doi: 10.7513/j.issn.1004-7638.2022.03.021

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Investigation on the effects of V and Ti on continuous cooling transformation behaviour of weathering steel

doi: 10.7513/j.issn.1004-7638.2022.03.021

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000， Sichuan, China
2.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, Heilongjiang, China
3.
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100000, China

Received Date: 2020-11-30
Publish Date: 2022-06-30

Abstract

Abstract

Continuous cooling transformation thermal simulation experiment of weathering steel with various V or Ti contents was conducted, and effects of cooling rate and V or Ti element on microstructure transformation and property of weathering steel were investigated. When V content increases from 0.03% to 0.07%, the martensite-start temperature increases 25 ℃, thereby promoting martensitic phase transformation. When Ti content increases from 0.03% to 0.10%, the bainitic phase transformation region expands, and the cooling rate with which bainite transformation starts decreases, thereby promoting bainitic phase transformation; meanwhile, martensite-start temperature decreases 22 ℃, and martensite-finish temperature increases 18 ℃, inducing martensitic phase transformation region shrinks, thereby restraining martensitic phase transformation. With the cooling rate increasing, HV0.2 hardness increases. HV0.2 hardness is mainly affected by the size and morphology of metallographic structure but fewer affected by second phase precipitates of V or Ti.
- weathering steel,
- CCT curve,
- vanadium,
- titanium,
- bainite,
- martensite,
- hardness

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References(13)

References

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