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Construction of Thermodynamic Database for Trump Elements in Steels

Research Project

Project/Area Number 07555494
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

OHTANI Hiroshi  Tohoku Univ., Cnt.Interdisciplinary Res.Ass.Prof., 学際科学研究センター, 助教授 (70176923)

Co-Investigator(Kenkyū-buntansha) AKAMATSU Satoshi  Nippon Steels Senior Researcher, 光製鉄所, 主任研究員
SENUMA Takehide  Nippon Steels Senior Researcher, 八幡技術研究部, 主任研究員
KAINUMA Ryusuke  Tohoku Vniv., Fac.Eng.Ass.Prof., 工学部, 助教授 (20202004)
ISHIDA Kiyohito  Tohoku Univ., Fac.Eng., Professor, 工学部, 教授 (20151368)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1996: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordstrump element / scrap / thermodynamic database / phase diagram
Research Abstract

The residual Cu in steel made from ferrous scrap is well known to cause surface fissure during the hot roling process. When the concentration of Cu in the surface layr exceeds the solubility of Cu in solid Fe, nearly pure liquid Cu forms at the interface of steel and the oxides. The solubiliyt of Cu in solid Fe is one of the dominant factors of this phenomena. Therefore, the effect of allying elements on the solubility of Cu in solid Fe has been investigated by using solid-liquid diffusion couples. An addition of Co, Ni and Al results in an increase of the solubility of Cu, while that of V,Cr, Mn, Si and Sn decreases the solubility. Thermodynamic calculation of the solid/liquid phase equilibria in the Fe-Cu-X ternary system has been also performed, whire a set of thermodynamic parameters of solid and liquid phases has been evaluated. Furthermore, the equation that describes the change of the solubility of Cu in solid Fe with an addition of alloying elements has been derived by thermodynamic analysis of these experimental values

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] H.Ohtani et al.: "Liquid/Solid Phase Equiliibria in the Fe-Cu-X Ternary Systems" ISIJ International. 37. 207-216 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohtani et al.: "Application of the CALPHAD Method to Material Design" Thermochimica Acta. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohtani et al.: "Liquid/Solid Phase Equilibria in the Fe-Cu-X Ternary Systems" ISIJ International. Vol.37. 207-216 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohtani et al.: "Application of the CALPHAD Method to Material Design" Thermochimical Acta. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H. Ohtani et al.: "Liquid/Solid Phase Equilibria in the Fe-Cu-X Ternary Systems" ISIJ International. 37. 207-216 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] H. Ohtani et al.: "Application of the CALPHAD Method to Material Design" Thermochimica Acta. 印刷中. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] H. Ohtani, K. Ishida et al.: "Liquid/Solid Phase Equiliibria in the Fe-Cu-X Ternary Systems" ISIJ Intern.(発表予定).

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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