Abstract
In order to enhance the formability and ridging resistance of Sn microalloyed ferritic stainless steel (FSS), an investigation was conducted on the texture and microstructure evolution, as well as formability and surface ridging of Sn microalloyed FSS at various hot rolling finishing temperatures (HRFTs). This study employed x-ray diffraction, optical microscopy, electron backscattering diffraction, tensile testing, and surface roughness measurement techniques. Hot-rolled sheets with HRFTs of 940, 870, 800, and 730 °C were subjected to annealing at 950 °C for 5 min and cold rolling at a reduction of 80%. Subsequently, they were annealed at 900 °C for 2 min. The research indicates that decreasing the HRFT has a positive impact on reducing {001} <110> grains and its texture intensity. Additionally, it leads to microstructure refinement and intensification of <111> //ND (ND: normal direction), thereby improving formability and resistance against ridging. When the HRFTs are within the range of 940–730 °C, the final sheet with an HRFT of 800 °C exhibits optimal formability and surface quality due to the formation of fine recrystallized <111> //ND grains with a sharp texture intensity. In comparison to the final sheet produced through conventional hot rolling with an HRFT of 940 °C, the average r value for the final sheet with an HRFT of 800 °C is increased by 19.4%, while the ridging height is reduced by 46.5%. This demonstrates the significance of reasonable optimization of the hot rolling process in enhancing the formability and ridging resistance of Sn microalloyed FSS.
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Acknowledgment
This work was financially supported by the National Natural Science Foundation of China (No. U1860201, No. 52174308), the Department of Education of Liaoning Province (No. LJ2020QNL004), and the Fundamental Research Funds for the Central Universities (No. N2002004).
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Bai, Y., Liu, Y., He, T. et al. Effects of Hot Rolling Finishing Temperature on Texture, Formability, and Surface Ridging of Sn Microalloyed Ferritic Stainless Steel. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08943-w
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DOI: https://doi.org/10.1007/s11665-023-08943-w