High Temperature Oxidation Behavior of Fe-1Cr-0.2Si Steel
SUN Bin1,2, HAO Mingxin1, YOU Hongguang1, WANG Hao2, CAO Guangming2
1 Mechanical Engineering Institute, Shenyang University, Shenyang 110044, China; 2 The State Key Laboratory of Rolling Technology and Automation, Northeastern University, Shenyang 110819, China
Abstract: To understand the high temperature oxidation behavior of ternary system Fe-1Cr-0.2Si steel,the high temperature oxidation test of Fe-1Cr-0.2Si steel was carried out by tube furnace at 900 ℃, 1 000 ℃ and 1 100 ℃ in air for 30 min. The results show that the scale develop comprises an outermost magnetite layer, and an inner mixed oxides layer of wüstite, FeCr2O4 and Fe2SiO4 at 900 ℃. It has been found that oxide scales consist of two distinguishable zones at 1 000 ℃ and 1 100 ℃. Outer oxide scale formed at these temperatures comprises three layers, an outer hematite (Fe2O3) layer, an intermediate magnetite (Fe3O4) layer, and a thick inner wüstite (FeO) layer. Inner oxide layer is composed of FeCr2O4 and Si oxide. The scale on the Fe-1Cr-0.2Si steel at different temperature therefore, consists of two layers: the outer layer which grows outward by cation diffusion and is composed mainly of Fe oxide, and the inner layer which grows inward by O2 penetration and which contains a considerable amount of Cr and Si. The thickness of wüstite layer increases with increasing temperature from 900 ℃ to 1 100 ℃, while the thickness proportion of Cr and Si rich region decreases. But the accumulation quantity increases with the increasing temperature. There are no Si and Cr bimetal compound oxides formed, while the microstructure delamination isn’t observed in the Si and Cr oxides.
孙彬, 郝明欣, 尤宏广, 王皓, 曹光明. Fe-1Cr-0.2Si钢的高温氧化行为[J]. 材料导报, 2020, 34(16): 16131-16135.
SUN Bin, HAO Mingxin, YOU Hongguang, WANG Hao, CAO Guangming. High Temperature Oxidation Behavior of Fe-1Cr-0.2Si Steel. Materials Reports, 2020, 34(16): 16131-16135.
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2020, Vol. 34 
