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Development of Next-generation Steels combined with High-density Oxide Particles assisted by Interfacing

Research Project

Project/Area Number 16360358
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionThe University of Tokyo

Principal Investigator

KOSEKI Toshihiko  The University of Tokyo, School of Eng, Dept of Mat Eng, Professor, 大学院・工学系研究科, 教授 (70361532)

Co-Investigator(Kenkyū-buntansha) SUZUKI Toshio  The University of Tokyo, School of Eng, Dept of Mat Eng, Professor, 大学院・工学系研究科, 教授 (70115111)
ASAKURA Kentaro  The University of Tokyo, School of Eng, Dept of Mat Eng, Research Associate, 大学院・工学系研究科, 助手 (10111460)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥14,800,000 (Direct Cost: ¥14,800,000)
Fiscal Year 2005: ¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 2004: ¥6,900,000 (Direct Cost: ¥6,900,000)
Keywordsinterfacing / steel / particle dispersion / wettability / intragranular ferrite / nucleation / simulation / grain growth / インターフェーシング / 反応濡れ
Research Abstract

To achieve new steels combined with high-density oxide particles, this study focuses on the following three subjects : (a)improvement of the wettability between steel melts and oxide particles which is necessary for the oxide particle dispersion through liquid phase processing, (b)development of numerical simulation techniques to give quantitative guideline for oxide particle dispersion to achieve fine grain steels, and (c)investigation of the mechanism of fine ferrite nucleation from oxide particles to achieve fine microstructure steels. As for the wettability, it was found that the addition of Ti to steel melts improved the melt-oxide wettability by forming Ti-rich nano-scale oxide on the original oxide. For the simulation of the effect of oxide dispersion on grain refinement in steels, a hybrid numerical model combining finite difference method and Monte Carlo method was developed, where the finite difference method is used for heat and mass transfer and the Monte Carlo method for n … More ucleation and growth simulation. Using the model, the pinning effect of oxide particles against austenite grain growth during various thermal cycles in steels was made quantitatively clear, which indicated that the pinning force of the dispersed oxide particles was the same as what the modified Zener theory predicted and suggested necessary amount of the dispersion to achieve desired grain size in steels used for welded structure. In the third research subject, a thin oxide film was deposited on a steel plate using electron-beam physical vapor deposition technique, and austenite-to-ferrite transformation behavior from the oxide-steel interface was investigated. It was found that ferrite was preferentially formed from the NaCl-type oxide such as TiO and MgO and this was attributed to good lattice matching between the oxide and ferrite. The investigation also suggested that the interface composition also exerted an influence on the formation and growth of ferrite from the oxide. Both findings would be the basis of the microstructure control in oxide-dispersed steels. Less

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (13 results)

All 2006 2005

All Journal Article (11 results) Book (2 results)

  • [Journal Article] 溶鋼-酸化物間の反応漏れ性に及ぼす鋼組成の影響2006

    • Author(s)
      鈴木崇久, 小関敏彦
    • Journal Title

      鉄と鋼 Vol.92 No.7

      Pages: 411-416

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of steel composition on the dispersion of oxideinclusions in steel melts2006

    • Author(s)
      T.Suzuki, T.Koseki
    • Journal Title

      Trends in Welding Research, S. David et al. eds., ASM International, Materials Park, OH (掲載予定)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Investigation of factors affecting ferrite transformation from steel-oxide interface2006

    • Author(s)
      M.Tsutsumi, H.Kato, T.Koseki
    • Journal Title

      Trends in Welding Research, S. David et al. eds., ASM International, Materials Park, OH (掲載予定)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of steel composition on the reactive wetting between steel melts and oxides2006

    • Author(s)
      T.Suzuki, T.Koseki
    • Journal Title

      Testu-to-Hagane Vol.92, No.7

      Pages: 411-416

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 溶鋼-酸化物間の反応濡れ性に及ぼす鋼組成の影響2006

    • Author(s)
      鈴木崇久, 小関敏彦
    • Journal Title

      鉄と鋼 Vol.92 No.7(掲載予定)

    • NAID

      110004731561

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 溶鋼-酸化物間の反応濡れ性に及ぼす鋼組成の影響2006

    • Author(s)
      鈴木崇久, 小関敏彦
    • Journal Title

      材料とプロセス Vol.19 No.1

      Pages: 160-160

    • NAID

      110004731561

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Inclusion Assisted Microstructure Control in C-Mn and Low Alloy Steel Welds2005

    • Author(s)
      T.Koseki, G.Thewlis
    • Journal Title

      Materials Science and Technology Vol.21 No.8

      Pages: 867-879

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] モンテカルロ法による鋼溶接熱影響部の粒成長シミュレーション2005

    • Author(s)
      荒木俊雄, 小関敏彦
    • Journal Title

      材料とプロセス Vo.18 No.6

      Pages: 1517-1517

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 鋼/酸化物界面からのフェライト変態挙動の検討2005

    • Author(s)
      加藤大樹, 小関敏彦
    • Journal Title

      材料とプロセス Vo.18 No.6

      Pages: 1598-1598

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 溶鋼-酸化物間の濡れ性に及ぼす界面反応の影響2005

    • Author(s)
      鈴木, 小関
    • Journal Title

      材料とプロセス 17・3

      Pages: 12-12

    • NAID

      10014480736

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 鋼-酸化物界面からのフェライト変態の影響因子2005

    • Author(s)
      堤, 小関
    • Journal Title

      材料とプロセス 17・3

      Pages: 34-34

    • NAID

      10014481733

    • Related Report
      2004 Annual Research Report
  • [Book] Effect of steel composition on the dispersion of oxide inclusions in steel melts(Trends in Welding Research)(S.David et al. eds.)2006

    • Author(s)
      T.Suzuki, T.Koseki
    • Publisher
      ASM International, Materials Park, OH(to be published)
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] Investigation of factors affecting ferrite transformation from steel-oxide interface(Trends in Welding Research)(S.David et al. eds.)2006

    • Author(s)
      M.Tsutsumi, H.Kato, T.Koseki
    • Publisher
      ASM International, Materials Park, OH(to be published)
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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