Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Growth of Interfacial Reaction Layer by the Isothermal Heat Treatment of Cast-Bonded Fe-C-(Si)/Nb/Fe-C-(Si)

Nb/Fe-C-(Si) 주조접합재에서 등온열처리시 계면반응층의 성장에 관한 연구

  • Jung, B.H. (Division of Advanced Materials Engineering, Pukyong University) ;
  • Kim, M.G. (Division of Advanced Materials Engineering, Pukyong University) ;
  • Jeong, S.H. (Division of Advanced Materials Engineering, Pukyong University) ;
  • Park, H.I. (Division of Advanced Materials Engineering, Pukyong University) ;
  • Ahn, Y.S. (Division of Advanced Materials Engineering, Pukyong University) ;
  • Lee, S.Y. (Division of Mechanical & Materials Engineering, Korea Maritime University)
  • 정병호 (부경대학교 신소재공학부) ;
  • 김무길 (부경대학교 신소재공학부) ;
  • 정상훈 (부경대학교 신소재공학부) ;
  • 박홍일 (부경대학교 신소재공학부) ;
  • 안용식 (부경대학교 신소재공학부) ;
  • 이성열 (한국해양대학교 기계소재공학부)
  • Received : 2003.07.28
  • Published : 2003.09.30
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Abstract

In order to study the interfacial reaction between Nb thin sheet and Fe-C-(Si) alloy with different Chemical compositions, they were cast-bonded. The growth of carbide layer formed at the interface after isothermal heat treatment at 1173K, 1223K, 1273K and 1323K for various times was investigated. The carbide formed at the interface was NbC and the thickness of NbC layer was increased linearly in proportional to the heat treating time. Therefore, It was found that the growth of NbC layer was controlled by the interfacial reaction. The growth rate constant of NbC layer was slightly increased with increase of carbon content when the silicon content is similar in the cast irons. However, as silicon content increases with no great difference in carbon content, the growth of NbC layer was greatly retarded. The calculated activation energy for the growth of NbC layer was varied in the range of 447.4~549.3 kJ/moI with the compositions of cast irons.

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Acknowledgement

Supported by : 부경대학교