高強度MIM焼結合金鋼の疲労破壊試験 Fatigue Failure Test for High Strength MIM Sintered Alloy Steels

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抄録

It is well-known that the high performance sintered alloys were obtained by a Metal Injection Molding (MIM) process. Although assessment of the dynamic properties such as fatigue strength is important to design a reliable structural sintered steels, especially for the high strength steels, there are very few reports about the dynamic properties of MIM steels at the present time. In this study, the behavior of fatigue properties for high strength 4600 steels (Fe-1.8%Ni-0.5%Mo-0.2%Mn) produced by the MIM process using mixed elemental powders were investigated taking the microstructure into account.<BR>Sintered and heat treated steels showed the fine heterogeneous microstructures with the segregation of Niadded as one of the alloying elements. The fatigue strength of heat treated MIM 4600 steels were higher than that of the conventional P/M steels because of the near full-densification and the spheroidization of pores. Additionally, the regions of a high nickel concentration, which were hard martensite or retained austenite and were uniformly distributed within the tempered martensitic matrix, were also effective against the crack propagation. This result indicated that it is possible to attain high performance structural steels combined with high static and dynamic strength by MIM techniques.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(7), 863-867, 1996-07-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002012578
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4004685
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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