Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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The Study about Characteristics of Welding Consumable and Weld Metal for EGW

EGW 용접재료 및 용접부 특성에 관한 연구

  • Lee, Jeong-Soo (Research Institute, Hanjin Heavy Industries & Construction Co., Ltd.) ;
  • Yun, Jin-Oh (Research Institute, Hanjin Heavy Industries & Construction Co., Ltd.) ;
  • Jeong, Sang-Hoon (Research Institute, Hanjin Heavy Industries & Construction Co., Ltd.) ;
  • Park, Chul-Gyu (R&D Center, KISWEL) ;
  • An, Young-Ho (Technical Research Laboratories Steel Solutions Research Group)
  • 이정수 (한진중공업 기술연구소) ;
  • 윤진오 (한진중공업 기술연구소) ;
  • 정상훈 (한진중공업 기술연구소) ;
  • 박철규 (KISWEL 연구소) ;
  • 안영호 (POSCO 기술연구원 강재솔루션연구그룹)
  • Received : 2009.12.11
  • Accepted : 2010.01.27
  • Published : 2010.04.30
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Abstract

In this study, newly developed welding consumables for EGW were welded in EH 36 TM steel plates and their welded joints were evaluated in point of mechanical properties and microstructures compared with imported consumables. Newly developed welding consumables were evaluated as good arc stability and slag fluidity, substantially the same with imported products. The tensile strength of all welded joints were sufficient to meet the requirements specified in a ship’s classification(490~640MPa) and all areas of fracture were heat affected zone(HAZ). Charpy absorbed energy values of all EG welded metals were sufficient to meet the requirements of classification(min. 34J) and those of newly developed wires were evaluated to be better than those of imported wires. As a result observing microstructures of single and tandem EG welded metals through optical and scanning electron microscope (OM&SEM), no grain boundary ferrite(PF(G)) were created in a prior austenite grain boundary and a volume fraction of a fine acicular ferrite were observed very high.

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References

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