Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Carbon-Restoration on Mechanical Properties of Automobile Safety Parts

자동차용 안전부품의 기계적 성질에 미치는 복탄처리의 영향

  • Kim, M.G. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Jung, B.H. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Jung, S.H. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Lee, B.C. (Dept. of Material, Ulsan Polytechnic College) ;
  • Kim, S.S. (Kwang Rim C & T Co.)
  • Received : 2002.12.12
  • Published : 2003.01.31
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Abstract

Decarburized zone of metal tongue which is used in seat belt for automobiles was carbon-restoration quenched and tempered using nitrogen-methanol gaseous atmosphere. The effects of microstructure and mechanical properties of metal tongue on the effectiveness of carbon-restoration during tempering was studied. Metal tongue showed $20{\sim}30{\mu}m$ decarburized zone. However, after carbon-restoration, it has uniform microstructure and thus hardness without decarburized zone. Carbon-restoration quenching and tempering process resulted in better wear and corrosion resistances than quenching and tempering process.

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Supported by : 부경대학교