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Superhigh Strengthening and Net Shaping for Sintered Low Alloy Steels by Utilizing the Partial Constituent Gradient Microstructure in MIM Process

Research Project

Project/Area Number 13555201
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Material processing/treatments
Research InstitutionKumamoto University

Principal Investigator

MIURA Hideshi  Kumamoto University, Graduate School of Sci. & Tech., Professor, 大学院・自然科学研究科, 教授 (30117254)

Co-Investigator(Kenkyū-buntansha) MATSUDA Mitsuhiro  Kumamoto University, Fac. of Eng., Assistant Researcher, 工学部, 助手 (80332865)
OTSU Masaaki  Kumamoto University, Fac. of Eng., Lecturer, 工学部, 講師 (20304032)
KAWAMURA Yoshihito  Kumamoto University, Graduate School of Sci. & Tech., Associate Professor, 大学院・自然科学研究科, 助教授 (30250814)
UEMURA Makoto  Kumamoto Industrial Research Institute, Researcher, 生産技術部・研究員
小松 敏泰  (株)本田技術研究所, 栃木研究所 第3研究ブロック, 研究員
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥10,200,000 (Direct Cost: ¥10,200,000)
Fiscal Year 2003: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2002: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥5,100,000 (Direct Cost: ¥5,100,000)
KeywordsMetal Injection Molding / Sintered low alloy steel / Ni addition / Heat treatment / Mezzo heterogeneous structure / Mechanical properties
Research Abstract

Metal Injection molding (MIM) process is an advanced powder processing technique because of net shaping with shape complexity at low processing energy and 100% material utilization. This study has been performed to clarify and to optimize the relationship between the mechanical properties and the microstructures for the superhigh strengthening sintered low alloy steels (Fe-Ni system) by using MIM process. A 6%mass%Ni MIM steel showed excellent properties of 2000MPa tensile strength, 5% elongation, and 500MPa fatigue strength. The Ni rich phase consists of only the martensitic structure if the size of agglomerated Ni powders is below 18μm, whereas the retained austenite is formed in the center of Ni rich phases if the size of agglomerated Ni powders is above 18μm. If the Ni powders of approximately 20μm particle size is dispersed uniformly in the matrix, therefore, superior mechanical properties may be obtained by even the same composition of Fe-6Ni-0.5Mo-0.2Mn steels. Instead of Fe-Ni, moreover, the Fe-Mn low alloy steel was investigated to obtain high performance properties, because Ni has harmful influence upon the human body, for example, a Ni allergy.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Miura, M.Matsuda: "Ultrahigh Strengthening Sintered Low Alloy Steels by Advanced Powder Processing-MIM"Journal of Advanced Science. Vol.13. 348-352 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura, M.Matsuda: "Superhigh Strength Metal Injection Molded Low Alloy Steels by In-Process Microstructural Control"Materials Transaction. Vol.43. 343-347 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 三浦秀士: "機械構造用材料の直列バリア"未踏科学技術協会エコマテリアル研究会第28回論文集. 57-64 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura: "Fatigue Fracture Behavior of PM and PIM Steels"Proc.of 3rd Int.Powder Metallurgy Conf.. (CD-ROM). 47-55 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Matsuda, H.Miura: "Mechanical Properties of Injection Molded Fe-6%Ni-0.4%C Steels with Varing Mo Content of 0.5 to 2%"METALS AND MATERIALS International. Vol.9. 537-542 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura, M.Matsuda: "Ultrahigh Strengthening Sintered Low Alloy Steels by Advanced Powder Processing-MIM"Journal of Advanced Science. Vol.13. 348-352 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura, M.Matsuda: "Superhigh Strength Metal Injection Molded Low Alloy Steels by In-Process Microstructural Control"Materials Transaction. Vol.43. 343-347 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura: "Barrier in Series with Machine Structural Materials"Proc. of 28th Eco-materials Forum of the Soc. of Non-Traditional Tech.. 57-64 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura: "Fatigue Fracture Behavior of PM and PIM Steels"Proc. of 3rd Int. Powder Metallurgy Conf.. (CD-ROM). 47-55 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Matsuda, H.Miura: "Mechanical Properties of Injection Molded Fe-6%Ni-0.4%C Steels with Varing Mo Content of 0.5 to 2%"METALS AND MATERIALS International. Vol.9. 537-542 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Miura: "Fatigue Fracture Behavior of PM and PIM Steels"Proc.of 3rd Int.Powder Metallurgy Conf.. CD-ROM. 47-55 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Matsuda, H.Miura: "Mechanical Properties of Injection Molded Fe-6%Ni-0.4%C Steels with Varing Mo Content of 0.5 to 2%"METALS AND MATERIALS International. Vol.9, No.6. 537-542 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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