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The Effect of S and Mn on the High-temperature Oxidation and Scale Spallation Behavior of Low-carbon Steels

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Title: The Effect of S and Mn on the High-temperature Oxidation and Scale Spallation Behavior of Low-carbon Steels
Authors: Hayashi, Shigenari Browse this author →KAKEN DB
Sekimoto, Takeshi Browse this author
Honda, Kazuhiko Browse this author
Kinoshita, Takeshi Browse this author
Tanaka, Kazuaki Browse this author
Ushioda, Kohsaku Browse this author
Narita, Toshio Browse this author
Ukai, Shigeharu Browse this author →KAKEN DB
Keywords: S effect
hot-rolled steel
scale spallation
Fe-FeS eutectic reaction
Issue Date: 15-Dec-2009
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 49
Issue: 12
Start Page: 1938
End Page: 1944
Publisher DOI: 10.2355/isijinternational.49.1938
Abstract: Early-stage oxidation behavior in air of low-carbon steels with and without S and Mn additions was investigated in terms of oxidation kinetics and scale spallation in a temperature range of 900 to 1150°C. S and Mn did not appear to affect the growth rate of oxide scales within the given oxidation time, ~30 min, however it was found that S significantly enhanced oxide scale spallation. Scale spallation occurred only on the S doped steels oxidized at temperatures more than 1000°C when the thickness of oxide scale exceeded about 120 μm. This scale spallation was confirmed to occur during cooling after the given oxidation time. GD-OES analysis revealed that a significant amount of S enrichment occurred at the oxide/steel interface, which was around 1 mass% on 100 ppm S steel after 120 s of oxidation at 1150°C. Such sulfur enrichment was speculated to be due to accumulation of rejected S from surface recession during the high-temperature oxidation. Observation of the steel surface after complete removal of the oxide scale by quenching the steels into liquid nitrogen clearly indicates the formation of eutectic Fe–FeS structure at scale/steel interface, resulting from a liquid phase formation above 1000°C. Formation of sulfide, and therefore a liquid phase at higher temperature, greatly affected oxide scale spallation.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 林 重成

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