A Comparison of Texture Development in an Experimental and Industrial Tertiary Oxide Scale in a Hot Strip Mill
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MICRO-ALLOYED low-carbon steel is a typical low-carbon composite alloy generally with a microamount of Nb, V, and Ti additions, either individually or together, in order to achieve mechanical properties XIANGLONG YU, Postdoc, formerly with School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia, is now with the School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. ZHENGYI JIANG, Professor, is with the School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, and also with the Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory, Taiyuan University of Science and Technology. JINGWEI ZHAO, Research Fellow, is with the School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong. DONGBIN WEI, Senior Lecturer, is with the School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, and also with the School of Electrical, Mechanical and Mechatronic Systems, University of Technology, Sydney, NSW 2007, Australia. JI ZHOU, Professor, is with the School of Materials Science and Engineering, Tsinghua University. QINGXUE HUANG, Professor, is with the Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China. CUNLONG ZHOU, Professor, is with the Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory, Taiyuan University of Science and Technology. Contact emails: [email protected], [email protected] Manuscript submitted March 29, 2015. Article published online August 25, 2015. METALLURGICAL AND MATERIALS TRANSACTIONS B
that low-carbon steel on its own does not have. These mechanical properties include high strength while still maintaining adequate toughness, weldability, ductility, and formability.[1–3] Because of this, the as-hot-rolled micro-alloyed steel without subsequent processing such as cold rolling has the potential to become an ideal candidate for a wide range of promising applications, particularly in automotive applications for fuel efficiency and weight saving.[4] Another promising potential for the Nb-V-Ti micro-alloyed steel lies in the tight oxide scale formed on the surface of the hot-rolled strip due to thermal oxidation at elevated temperatures.[5,6] Along with the steel substrate, the tight oxide scale is expected to deform without blistering failures and to further enhance the tribological properties of the as-hot-rolled steels during the downstream metal forming process.[7–9] This means that we need to further characterize the microstructural and crystallographic features of the oxide scale formed on the hot-coiled steel after coiling during hot rolling,[10,11] i.e., the tertiary oxide scale. The oxide scale formed in the particular case of hot rolling can generally be classified as the primary, secondary, and tertiary oxide scales, normally corresponding to the reheating stages, roughing stages
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