Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
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Mechanical properties of fine grained steel weldments formed with low heat input

세립강 저입열 용접부의 기계적 성질

  • 윤중근 (현대중공업(주) 기술개발본부 산업기술연구소) ;
  • 박태동 (현대중공업(주) 기술개발본부 산업기술연구소) ;
  • 김광수 (현대중공업(주) 기술개발본부 산업기술연구소) ;
  • 박영수 (현대중공업(주) 기술개발본부 산업기술연구소)
  • Published : 2003.11.01
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Abstract

Low heat input welding methods have been investigated in order to minimize the HAZ softening of the 600MPa grade fine grained steel weldment. The welding processes of interest were a high speed FCA welding with a multi-torch welding system, laser welding with filler feeding and hybrid laser welding. No HAZ softening was found for all the weldments formed with low heat input less than 10kJ/cm. Tensile strength of the weldments was high enough to satisfy the required value. Impact toughness of the weldments was also good even at -20$^{\circ}C$.

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