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稀土鈰對鋼中溶質(zhì)碳偏析影響的熱力學(xué)研究
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重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院,重慶大學(xué) 材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金青年基金(項(xiàng)目號51504048)


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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    摘要:

    以Fe-C-Ce合金為對象,建立多元合金溶質(zhì)分配系數(shù)熱力學(xué)計(jì)算模型,并利用FactSage Equilib模塊計(jì)算不同鈰含量下凝固體系中溶質(zhì)碳的平衡分配系數(shù),以此研究稀土鈰對鋼中溶質(zhì)碳偏析的影響。結(jié)果表明：稀土鈰對體系的凝固相轉(zhuǎn)變影響較大。鈰的添加可促使奧氏體的轉(zhuǎn)變,使L+γ固-液共存區(qū)擴(kuò)大,從而使碳的平均平衡分配系數(shù)增大,起到減小鋼中碳偏析的作用。改善鋼中碳偏析的最適宜鈰添加量與碳含量有關(guān)。Fe-0.1%C-x%Ce體系最適宜的稀土鈰添加量為0.047%~0.057%。Fe-0.25%C-x%Ce體系最適宜的稀土鈰添加量為0.03%~0.04%。

    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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陳華標(biāo),龍木軍,陳登福,黃云偉,桂林濤,馬有光,段華美.稀土鈰對鋼中溶質(zhì)碳偏析影響的熱力學(xué)研究[J].稀有金屬材料與工程,2018,47(7):2093~2099.[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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  • 收稿日期:2016-06-30
  • 最后修改日期:2016-11-02
  • 錄用日期:2016-11-11
  • 在線發(fā)布日期: 2018-10-10
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