Effects of Si and Cr on Complete Decarburization Behavior of High Carbon Steels in Atmosphere of 2 vol. % O₂

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• 作者：Yang-bo LIU^a ; ^b ; ^{liuyangbo913@126.com}Author Vitae ; Wei ZHANG^a ; Qian TONG^a ; Qi-song SUN^a
• 关键词：complete decarburization ; silicon ; chromium ; low oxygen concentration ; oxide scale
• 刊名：Journal of Iron and Steel Research, International
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：23
• 期：12
• 页码：1316-1322
• 全文大小：2175 K
• 卷排序：23

文摘

The effects of chemical compositions, especially silicon and chromium contents, on the complete decarburization behaviors of steels in atmosphere of 2 vol. % O2 and 98 vol. % N2 were investigated by using a simultaneous thermal analyzer. Complete decarburization was observed at both 750 and 800 °C for 60Si2MnA steel, while 750 °C only for 92A steel. For GCr15 steel, no decarburization was found at 750 or 800 °C, and only partial decarburization was observed at 850 °C. It indicates that silicon promotes while chromium prevents the complete decarburization of steels in atmosphere with 2 vol. % O2. The main reason is that silicon increases while chromium reduces the equilibrium concentration of ferrite at the interface of ferrite and austenite, which results in the complete decarburization.