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1996 Fiscal Year Final Research Report Summary

Thermodynamic Study on Deoxidation Equilibrium of High Alloyed Steel

Research Project

Project/Area Number 07455297
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionTohoku University

Principal Investigator

HINO Mitsutaka  Faculty of Engineering, Tohoku University Proffessor, 工学部, 教授 (10091729)

Co-Investigator(Kenkyū-buntansha) ISHII Fujio  Faculty of Engineering, Tohoku University Lecturer, 工学部, 講師 (10005291)
Project Period (FY) 1995 – 1996
KeywordsHigh alloyed steel / Deoxidation equilibria / Activity / Interaction parameter / Heat resisting steel / Non-metallic inclusion / High purity steel / Thermodynamics
Research Abstract

Demand for high alloyed steel such as Fe-Ni based alloy, ferrite-and austenite-stainless steel is increasing year by year due to the expansion of the market of advanced electronic materials. For the production of such high purity alloyed steel, it is necessary to control/or minimize non-metallic inclusion in steel products formed during the deoxidation process. A number of investigations have been done on the deoxidation equilibria in conventional low alloyed steel. However, thermodynamic knowledge on the deoxidation equilibria in high alloyed steel is very poor. The objective of the present work is to establish thermodynamic information on the deoxidation equilibria in high alloyed steel containing Ni and Co. In 1995, equilibrium among Mn-Si-O in high manganese steel (<20mass%Mn) was first investigated at MnO saturation in the temperature range from 1550゚C to 1650゚C.It was found that equilibrium oxygen content at high Mn content can not be predicted by using reported interaction parameter, and thermodynamic parameters were re-assessed based on the present experimental results. In 1996, deoxidation equilibria of Al, Ca, Mg, Zr in liquid Fe-Ni-Co alloys were studied. Interaction parameters, deoxidation products and equilibrium constants were determined as a function of temperature. Phase stability of spinel non-metallic inclusion (MgO・Al_2O_3), which is one of the most harmful inclusion, was also predicted in the present work.

  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] M.Hino: "Thermodynamics of Secondary Refining Slag for Steelmaking" Process Technology Conference Proceedings. 14. 47-51 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石井不二夫: "固体CaOと平衡するNi-Ca-OとNi-Ta-Ca-Oの融体の熱力学" 鉄と鋼. 82. 465-470 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石井不二夫: "固体MgOと平衡するNi-Mg-OおよびNi-Nb-Mg-O融体の熱力学" 鉄と鋼. 81. 786-791 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Ishii: "Thermodynamics of Magnesium and Calcium in Liquid Nickel and Nickel Alloys" Metallurgical and Materials Transactions B 28B. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊東裕恭: "溶鉄のMg脱酸平衡" 鉄と鋼. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Itoh: "Thermodynamics on the Formation of Spinel Non-metallic Inclusion" Metallurgical and Materials Transactions B 28B. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊東裕恭: "溶鉄のCa脱酸平衡" 鉄と鋼. 83(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石原一弥: "溶融コバルトのアルミニウム脱酸平衡" 日本金属学会誌. 38(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 日野光兀: "高合金鋼の溶製における高清浄化に関する熱力学的研究課題" 日本鉄鋼協会生産技術部門特殊鋼部会, 15 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hino: "Thermodynamics of Secondary Refining Slag for Steelmaking" Process Technology Conference Proceedings. 14. 47-51 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Ishii: "Thermodynamics of Ni-Ca-O and Ni-Ta-Ca-O Melts in Equilibrium with Solid CaO" Tetsu-to-Hagane. 82. 465-470 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Ishii: "Thermodynamics of Ni-Mg-O and Ni-Nb-Mg-O Melts in Equilibrium with Solid MgO" Tetsu-to-Hagane. 81. 786-791 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Ishii: "Thermodynamics of Magnesium and Calcium in Liquid Nickel and Nickel Alloys" Metallurgical and Materials Transactions B. 28B (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Itoh: "Deoxidation Equilibrium of Magnesium in Liquid Iron" Tetsu-to-Hagane. 83 (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Itoh: "Thermodynamics on the Formation of Spinel Non-metallic Inclusion" Metallurgical and Materials Transactions B. 28B (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Itoh: "Deoxidation Equilibrium of Calcium in Liquid Iron" Tetsu-to-Hagane. 83, (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ishihara: "Deoxidation Equilibrium of Al in Liquid Co" Materials Transactions JIM. 38 (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Hino: The Iron and Steel Institute of Japan. Thermodynamic Subjects for the Technology of High Purity Alloyed Steel Production, 15 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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