As an optimal microstructure of pipeline steels, acicular ferrite is widely found in steels used in oil and gas pipeline transportation because it possesses both high strength and good toughness. In this paper, the microstructure of acicular ferrite and its continuous cooling transformation (CCT) diagrams of six steels with different carbon and alloy additions have been studied by using dilatometry, optical metallography. And the effects of different hot deformation processes on the CCT diagrams and microstructures have also been studied. Furthermore, the effects of microalloyed elements and hot deformation on continuous cooling transformation have been discussed. The results show that lower carbon content and alloy additions such as Mn, Nb, Ti, Mo, Ni and/or Cu in steels will promote the formation of acicular ferrite. The hot deformation promotes the acicular ferrite transformation and refines the microstructures of final products.
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1 April 2006
Review Article|
April 01 2006
Effects of Chemical Composition and Hot Deformation on Continuous Cooling Transformation Behavior of Acicular Ferrite Pipeline Steels
Furen Xiao;
Furen Xiao
State Key Laboratory of Metastable Materials Science & Technology and College of Materials Science & Engineering, Yanshan University, Qinghuangdao 066004, P.R. China
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Bo Liao;
Bo Liao
State Key Laboratory of Metastable Materials Science & Technology and College of Materials Science & Engineering, Yanshan University, Qinghuangdao 066004, P.R. China
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Guiying Qiao;
Guiying Qiao
State Key Laboratory of Metastable Materials Science & Technology and College of Materials Science & Engineering, Yanshan University, Qinghuangdao 066004, P.R. China
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Yiyin Shan;
Yiyin Shan
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China
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Yong Zhong;
Yong Zhong
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China
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Ke Yang
Ke Yang
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China
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Publisher: Emerald Publishing
Online ISSN: 1573-6113
Print ISSN: 1573-6105
© Emerald Group Publishing Limited
2006
Multidiscipline Modeling in Materials and Structures (2006) 2 (4): 389–410.
Citation
Xiao F, Liao B, Qiao G, Zhang C, Shan Y, Zhong Y, Yang K (2006), "Effects of Chemical Composition and Hot Deformation on Continuous Cooling Transformation Behavior of Acicular Ferrite Pipeline Steels". Multidiscipline Modeling in Materials and Structures, Vol. 2 No. 4 pp. 389–410, doi: https://doi.org/10.1163/157361106778554842
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