Activities of Chromium in Molten Fe-Cr-C Alloy.

• Park Jung-Ho

  Graduate Student, Pohang University of Science and Technology

• Min Dong-Joon

  Department of Metallurgical Engineering, Yonsei University

• Rhee Chang-Hee

  Department of Materials Science and Engineering, Pohang University of Science and Technology

抄録

The activity of chromium in molten Fe–Cr–C alloy was measured at 1823 K using chemical equilibration technique in the dilute Cr concentration region. It was found that chromium in Fe–Cr–C alloy showed Henrian behavior up to 3 mass% Cr and that the activity coefficient of chromium at infinitely dilute solution in Fe–Cr alloy was 3.90 at 1823 K. <br>The effects of carbon on the activity coefficient of chromium at infinitely dilute solution in Fe–Cr–C alloy could be expressed as follows;<br><br>ln γ_Cr(S)^o=1.29–7.09X_C   at 1823 K <br><br>There is little temperature dependence of the activity of chromium at carbon saturated condition. <br> The standard Gibbs energy of mixing for Fe–Cr alloy and Fe–Cr–C_satd alloy was calculated using the Gibbs–Duhem relationship. The results indicated that the affinity between chromium is larger than that of chromium for iron in Fe–Cr alloy. But the affinity between chromium and carbon is increased with increasing carbon.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 38 (12), 1287-1291, 1998

  一般社団法人 日本鉄鋼協会

キーワード

• chromium activity
• infinitely dilute solution
• Henrian behavior
• tramp element
• carbon solubility
• Gibbs–Duhem relationship
• standard Gibbs energy of mixing

詳細情報

• CRID: 1390001206451893120
• NII論文ID: 10002461551
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.38.1287
• COI: 1:CAS:528:DyaK1MXotlChtg%3D%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/38/12/38_12_1287/_pdf
• 本文言語コード: en
• データソース種別:
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