Abstract
The effects of the finisher entry temperatures (FETs) on the surface ridging behavior for an ultra-purified 21%Cr ferritic stainless steel have been investigated. The results indicate that decreasing the FET facilitates the formation of in-grain shear bands in the hot rolled slab. The in-grain shear bands supplied recrystallization nucleation sites in grains during subsequent annealing through coalescence of subgrains, which is beneficial to refine the microstructures and intensify the {111}//ND textures. This effect will evolve to the final cold rolled and annealed sheet. The micro-texture analysis indicates that the formation of grain colony in the final sheet is weakened by decreasing the FET. Then, the surface ridging resistance of FSS is enhanced due to the optimizing of micro-texture distribution.
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Acknowledgments
This work was supported by the Fundamental Research Funds for the Central Universities of China, the Scientific Research Fund of Liaoning Provincial Education Department under Grant No. L2015120, and the Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University, China (Grant No. 2015003). Part of this work was presented at the International Deep Drawing Research Group Conference (2015).
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Zhang, C., Zhang, LW. & Liu, ZY. Improvement of Surface Ridging Resistance of an Ultra-purified Ferritic Stainless Steel by Optimizing Hot Rolling Condition. Acta Metall. Sin. (Engl. Lett.) 29, 561–567 (2016). https://doi.org/10.1007/s40195-016-0421-2
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DOI: https://doi.org/10.1007/s40195-016-0421-2