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Abstract：
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Austenitic stainless steel is widely used in industry, decoration, food, medical machinery and other fields, and has good corrosion resistance and high temperature resistance, etc. However, the oxide scale formed on the surface of austenitic stainless steel causes local cracks in the steel plate and affects the surface quality of steel during the high temperature heating process. Therefore, the high temperature oxidation behavior of austenitic stainless steel was studied, and the evolution processes of the oxide scale on the steel surface under the heating and hot rolling conditions were observed by SEM, EDS and XRD. The results show that when the temperature is 600 ℃,a thin and dense Cr2O3 oxide layer is formed on the surface of austenitic stainless steel, and with the increasing of temperature, a uniform double-layer oxide layer gradually formes on the surface of steel and thickens over time. However, when the temperature is 1250 ℃,the upper oxide scale Fe3O4 is easy to fall off and layers with the substrate, and the oxide scale with the lower layer and the substrate tightly combined is mainly composed of FeO, Cr2O3 and spinel oxide containing Si element. Furthermore, in the rolling process, the surface of the substrate undergoes cyclic oxidation and is destroyed into a broken block structure after the single layer of oxide scale falls off, and the oxide scale is mainly composed of iron oxide, Cr2O3 precipitation and FeCr2O4.
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Funds：
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2020年山西省高等学校教学改革创新项目（J2020457）
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AuthorIntro：
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作者简介：张志红（1985-），女，硕士，讲师，E-mail：574055042@qq.com
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Reference：
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