Evolution of Microstructure and Oxidation Layer of 430 Stainless Steel During Hot Rolling

Abstract:

OM, SEM, TEM and XRD were used to analyze microstructure and oxidation layer of 430 stainless steel during hot rolling, and microstructure characteristic and oxidation layer evolution rule under high temperature deformation were studied. It is shown that microstructure after each pass under laboratory rolling condition is composed of austenite and ferrite, but there are significant differences in the size, morphology and distribution of dual phase microstructure. Oxidation layer of each pass consists mostly of Fe₂O₃, Fe₃O₄ and FeCr₂O₄. Thickness of surface oxide film decreases from 12μm to about 4~5μm as rolling pass increases. Compared to experimental result of laboratory rolling, because high-pressure descaling is used in practical production, meanwhile deformation amount is higher and surface quality of roller is better, oxidation layer of finished product is uniform, distributes continuously and has strong internal bonding force with matrix.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 316-320
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.316
• Online since: February 2011
• Authors: Lian Hong Yang, Ya Zheng Liu, Le Yu Zhou, Long Jiao Li
• Keywords: 430 Stainless Steel, Dual Phase Microstructure, Oxidation Layer

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