Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
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Effect of heat input on the strength & micro-fissuring of alloy 59 weld

용접입열이 Alloy 59 용접부 강도와 미세균열에 미치는 영향

  • 최준태 (현대중공업 산업기술연구소 용접연구실) ;
  • 김영일 (현대중공업 산업기술연구소 용접연구실) ;
  • 김대순 (현대중공업 산업기술연구소 용접연구실)
  • Published : 2005.11.17
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Abstract

Compared with Inconel 625 (ERNiCrMo-3) weld, Nb-free Alloy 59 (ERNiCrMo-13) weld with 15% Mo showed much higher resistance to hot cracking. Especially in the condition of current 350A and 30CPM of welding speed, no crack was detected at Inconel 625 fillet weld. Furthermore, it was found that the strength of Alloy 59 is sensitive to welding heat input. Up to around 14kJ/cm of heat input, Alloy 59 showed 678N/$mm^{2}$ of ultimate strength and 466N/$mm^{2}$ of yield strength. However, as heat input increased above 14kJ/cm, Alloy 59 weld could not satisfy the weld strength required for European LNG tank.

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