Effects of Si and its content on the scale formation on hot-rolled steel strips
Effects of Si and its content on the scale formation on hot-rolled steel strips
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DOI：
10.1016/j.matchemphys.2008.06.021
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发表时间：
2008-12
影响因子：
4.6
通讯作者：
Yu Yang;C. Yang;S. Lin;C. Chen;W. Tsai
中科院分区：
文献类型：
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作者：
Yu Yang;C. Yang;S. Lin;C. Chen;W. Tsai
硅含量的影响（0.01 - 1.91wt. %）对硅钢氧化动力学和氧化膜结构的影响。使用热重分析仪（TGA）测量各种钢在700 - 1000 ° C温度范围内在干燥空气中氧化后的重量变化。结果表明，随着钢中硅含量的增加，氧化速率和氧化膜厚度均减小。在普通碳钢上形成的并且含有0.51重量%的氧化皮。Si主要由Fe2O3、Fe3O4和Fe1 − XO组成。在含0.51wt. % si.对于含1.14wt. %结果表明，氧化膜由两层不同的氧化物组成，外层为Fe_2O_3，内层含有大量的Si。含1.91wt. %的钢的氧化皮思瘦了很多。在外层Fe2O3层之下，在氧化膜/基体界面处发现了富含Si和Al的氧化物，这改善了钢的钝化性。在一些离散的表面斑点上发现了氧化物局部分解导致的结垢形成，特别是对于含有1.91wt. % si.在高硅钢中也观察到内氧化。
The effect of silicon content (0.01–1.91wt.%) on the oxidation kinetics and the structure of scales formed on silicon steels was investigated. A Thermal Gravimetric Analyzer (TGA) was used to measure the weight changes of various steels oxidized in dry air in the temperature range of 700–1000°C. The results showed that both oxidation rate and scale thickness decreased with increasing silicon content in the steels. The scales that were formed on plain carbon steel and contained 0.51wt.% Si mainly consisted of Fe2O3, Fe3O4, and Fe1−XO. A scale with banded oxide structure was also observed in the steel containing 0.51wt.% Si. For the steel containing 1.14wt.% Si, a scale with two distinct layers of oxides was found. The outer layer was Fe2O3while the inner layer of the oxide contained a high amount of Si. The scale of the steel containing 1.91wt.% Si was much thinner. Beneath the outer Fe2O3layer, an oxide enriched with Si and Al was found at the scale/substrate interface, which improved the passivity of the steel. Nodular scale formation resulting from local breakdown of the oxide was found on some discrete surface spots, particularly for the steel containing 1.91wt.% Si. Internal oxidation was also observed in the high Si-containing steels.