Abstract
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.
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Liu, Yb., Zhang, W., Tong, Q. et al. Effects of Si and Cr on Complete Decarburization Behavior of High Carbon Steels in Atmosphere of 2 vol. % O2. J. Iron Steel Res. Int. 23, 1316–1322 (2016). https://doi.org/10.1016/S1006-706X(16)30194-7
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DOI: https://doi.org/10.1016/S1006-706X(16)30194-7