超硬合金と鋼の焼結接合における応力緩和層材料としてのWC-Fe系合金 WC-Fe Alloys as Stress Relief Layer Materials for Sinter-Bonding between Cemented Carbides and Steels

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The applicability of sintered WC-Fe alloys as stress relief layer materials for the sinter-bonding method of cemented carbide and carbon steel has been basically discussed. The structure and mechanical properties of sintered WC-(20-40mass%)Fe alloy compacts were investigated. These WC-Fe alloys compacts sintered at 1553K or higher showed complete densification. η phase (Fe<SUB>3</SUB>W<SUB>3</SUB>C) particles which were coarser than the tungsten carbides particles were formed in the sintered compacts, and also fine pearlite structure were formed in binder metal parts. Though the hardness of sintered compacts were almost independent of sintering temperature being higher than 1553K, the fourpoint bending strength decreases with the increase of sintering temperature. It may be caused by coarsening of rl phase particles. Therefore the restraint in growth of rl phase particles in the WC-Fe alloys is effective for the high bonding strength. Coefficient of thermal expansion α (K<SUP>-1</SUP>) between 303 and 973K for the compacts sintered at 1553K was given by α=(0.093V<SUB>Fe</SUB>+4.12)×10<SUB>-6</SUB>, where V<SUB>Fe</SUB> is volume percent of iron powder.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(12), 1111-1115, 1998-12-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002053323
  • 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
    4629444
  • 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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