Effect of annealing time on oxide phases and morphology of Fe- 3%Si steel surface during decarburization

doi:10. 13228/j.boyuan.issn1001- 0963. 20160412

Journal of Iron and Steel Research ›› 2017, Vol. 29 ›› Issue (12) : 1024-1029. DOI: 10. 13228/j.boyuan.issn1001- 0963. 20160412

GUO Yue¹,DAI Fang- qin¹,HU Shou- tian²,GAO Yang²,LUO Zhong- han²

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Abstract

Annealing time is an important process parameter to determine the oxidation behavior of Fe- 3%Si steel during decarburization, and then affects the nitriding process and secondary recrystallization process. The oxidation behavior of Fe- 3%Si steel with different annealing time was studied in N2+H2+H2O at 1103K. The evolution of oxidized layer and the relationship between structure of oxidized layer and oxide content were investigated using Vertex type Fourier transform infrared, scanning electron microscopy and Glow Discharge Spectrometer. The results show that the oxides are composed of SiO2 and Fe2SiO4. With the increase of annealing time, the internal oxidation zone thickens and the enrichment of silicon increases in the oxidized layer. When the depth of oxidized layer is same, the oxides content increases with increasing annealing time.

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Decarburization / Internal oxidation / Annealing time

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GUO Yue,DAI Fang- qin,HU Shou- tian,GAO Yang,LUO Zhong- han. Effect of annealing time on oxide phases and morphology of Fe- 3%Si steel surface during decarburization[J]. Journal of Iron and Steel Research, 2017, 29(12): 1024-1029 https://doi.org/10. 13228/j.boyuan.issn1001- 0963. 20160412

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