Influence of Top Slag on the Plasticity of CaO-SiO₂-Al₂O₃ Inclusions in 42CrMoA Crankshaft Steel

Abstract:

In order to control the plasticity of CaO-SiO₂-Al₂O₃ system inclusions so as to reduce the harm to the quality of 42CrMoA crankshaft steel, the target controlling ranges of CaO-SiO₂-Al₂O₃ inclusions is put forward. On the basis, influence of CaO-SiO₂-Al₂O₃ and CaO-SiO₂-Al₂O₃-MgO system top slag on the content of calcium and aluminum in molten steel is contrasted. Theoretical research results show that, calcium activity should be controlled in the range of (90~3300)×10^-10, oxygen activity should be below 7×10^-6, the mass percent of calcium should be controlled more than 75ppm. And CaO-SiO₂-Al₂O₃-MgO should be a good choice to obtain the plastic inclusions of CaO-SiO₂-Al₂O₃.

• Periodical: Materials Science Forum (Volume 804)
• Pages: 285-288
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.804.285
• Online since: October 2014
• Authors: Jian Tao Ju, Sen Yang, Yan Ping Guo, Yuan She*, Zhao Hui Zhang
• Keywords: CaO-SiO₂-Al₂O₃, CaO-SiO₂-Al₂O₃-MgO, FactSage, Plasticity

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