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A Thermodynamic Study of Cerium Effect on the Carbon Segregation in Steel
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College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University

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    Abstract:

    In order to investigate the effect of cerium on the carbon segregation in steel, a thermodynamic calculation mold of equilibrium partition coefficient in multi-component alloy is established. The equilibrium partition coefficient of C in Fe-C-Ce system with different cerium content is calculated with Equilib moudle of FactSage. Results show that the effect of cerium on phase transformation is remarkable during solidification. The addition of cerium facilitates austenite transformation and enlarges the L-γ coexist zone. Cerium increases the average equilibrium partition coefficient which means it can mitigate the segregation of C in steel. The optimum addition content of cerium to improve the segregation of C in steel are associated with carbon content. For Fe-0.1%C-x%Ce system, the optimum addition content of cerium ranges from 0.047% to 0.057%. And for Fe-0.25%C-x%Ce system, the optimum addition content of cerium ranges from 0.03% to 0.04%.

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[Chen Huabiao, Long Mujun, Chen Dengfu, Huang Yunwei, Gui Lintao, Ma Youguang, Duan Huamei. A Thermodynamic Study of Cerium Effect on the Carbon Segregation in Steel[J]. Rare Metal Materials and Engineering,2018,47(7):2093~2099.]
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History
  • Received:June 30,2016
  • Revised:November 02,2016
  • Adopted:November 11,2016
  • Online: October 10,2018

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