Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Precipitation and Precipitate Coarsening Behavior According to Nb Addition in the Weld HAZ of a Ti-containing Steel

Nb의 첨가에 따른 Ti 첨가 저합금강 용접열영향부에서의 석출물 거동 변화

  • Moon, Joon-Oh (Division of Materials Science and Engineering, Hanyang University) ;
  • Lee, Chang-Hee (Division of Materials Science and Engineering, Hanyang University)
  • Published : 2008.02.28
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Abstract

The effect of Nb addition on the precipitation and precipitate coarsening behavior was investigated in Ti and Ti + Nb steel weld HAZ. A dilatometer equipped with a He-quenching system was used to simulate the weld thermal cycle. Compared to $TiC_yN_{1-y}$ precipitate in a Ti containing steel, $Ti_xNb_{1-x}C_yN_{1-y}$ complex particle with addition of Nb is precipitated in a Ti + Nb containing steel. Meanwhile, precipitate coarsening occurred more easily in Ti + Nb steel, which may be because the high temperature stability of $Ti_xNb_{1-x}C_yN_{1-y}$ complex particle is deteriorated by the Nb addition.

Keywords

References

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