한국분말재료학회지 (Journal of Powder Materials)

  • 제20권5호
  • /
  • Pages.366-370
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  • 2013
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  • 2799-8525(pISSN)
  • /
  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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WC/Ni-Si 초경합금의 기계적 성질에 미치는 B4C의 영향

Effect of Added B4C on the Mechanical Properties of WC/Ni-Si Hardmetal

  • 이길근 (부경대학교 신소재시스템공학과) ;
  • 하국현 (한국기계연구원부설재료연구소)
  • Lee, Gil-Geun (Department of Materials System Engineering, Pukyong National University) ;
  • Ha, Gook-Hyun (Powder Technology Department, Korea Institute of Materials Science)
  • 투고 : 2013.09.13
  • 심사 : 2013.10.23
  • 발행 : 2013.10.28
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초록

The effects of $B_4C$ on the mechanical properties of WC/Ni-Si hardmetal were analyzed using sintered bodies comprising WC(70-x wt.%), Ni (28.5 wt.%), Si (1.5 wt.%), and $B_4C$ (x wt.%), where $$0{\leq_-}x{\leq_-}1.2$$ wt.%. Samples were prepared by a combination of mechanical milling and liquid-phase sintering. Phase and microstructure characterizations were conducted using X-ray diffractometry, scanning electron microscopy, and electron probe X-ray micro analysis. The mechanical properties of the sintered bodies were evaluated by measuring their hardness and transverse rupture strength. The addition of $B_4C$ improved the sinterability of the hardmetals. With increasing $B_4C$ content, their hardness increased, but their transverse rupture strength decreased. The changes of sinterability and mechanical properties were attributed to the alloying reaction between $B_4C$ and the binder metal (Ni, Si).

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