The Effect of the Si Content on the Morphology and Amount of Fe2SiO4 in Low Carbon SteelsReport as inadecuate




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The State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, 947 Heping Avenue, Qingshan District, Wuhan 430081, China





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Academic Editors: Vineet V. Joshi and Alan Meier

Abstract In order to study the effect of the Si content on the morphology, amount, and distribution of fayalite Fe2SiO4, three low-carbon steels with different Si contents were selected, and reheating tests were conducted in an industrial furnace in a hot strip plant. The results show that Si distributes in two forms—first, Fe2SiO4, in the innermost layer of the oxide scale, and, second, granular SiO2, dispersively distributed in the matrix near the scale. In addition, Fe2SiO4 appears in a net-like form in the innermost layer of the oxide scale close to the iron matrix when the Si content is 1.21 wt. %. However, no obvious net-like Fe2SiO4 is observed when the Si content is less than 0.25 wt. %. Moreover, the inhibition effect of the solid Fe2SiO4 on the oxidation reaction plays a more important role than the promotion effect of the liquid Fe2SiO4 during the entire oxidation reaction. Therefore, the total thickness of the scale decreases with the increase in Si content. View Full-Text

Keywords: Si content; oxide scale; Fe2SiO4; X-ray diffraction Si content; oxide scale; Fe2SiO4; X-ray diffraction





Author: Qing Yuan, Guang Xu * , Mingxing Zhou and Bei He

Source: http://mdpi.com/



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