Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

A Study on the Characteristic Change of 2.25Cr-1Mo Steel Welds for Various Welding Processes

용접 공정에 따른 2.25Cr-1Mo강 용접이음부의 특성 변화에 관한 연구

  • BANG HAN-SUR (Dept. of Naval Architecture and Ocean Engineering, Chosun University) ;
  • OH CHONG-IN (Dept. of Naval Architecture and Ocean Engineering, Graduate School of Chosun University) ;
  • BANG HEE-SUN (Dept. of Naval Architecture and Ocean Engineering, Chosun University) ;
  • KIM HYUNG (Dept. of Naval Architecture and Ocean Engineering, Graduate School of Chosun University)
  • 방한서 (조선대학교 공과대학 선박해양공학과) ;
  • 오종인 (조선대학교 선박해양공학과 대학원) ;
  • 방희선 (조선대학교 공과대학 선박해양공학과) ;
  • 김형 (조선대학교 선박해양공학과 대학원)
  • Published : 2005.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

In spite of the merits of laser welding being able to obtain the high welding quality such as smaller width of melting and heat affected zone, smaller welding deformation and fine grains of weldment compared to arc welding, laser welding is mainly used in joining of thin steel parts of electronics industry. Laser welding is getting widely used in joining thick plate and special kinds of steel due to its high power. While the arc welding is still applied for 2.25Cr-1Mo steel which is the essential material of atomic power generation equipment, the laser welding is not yet applied despite its high quality. So it has a trial to a special case demanding high welding quality such as atomic power plant. Accordingly, in this research, the mechanical properties of weldments by arc and laser welding were investigated using FEM to confirm the applicability of laser welding to 2.25Cr-1Mo steel. The Charphy test was carried out to understand the effect on the fracture toughness of weldments. The results of examination and test of the mechanical properties showed the validity of this research.

Keywords

References

  1. 방한서, 김유철 (1991). '유한요소법에 의한 후판용접시의 3차원 비정상열전도해석', 대한용접학회지, 제9권, 제2호, pp 37-43
  2. 방한서 (1992). '후판 용접부의 역학적 특성 -유한요소법에 의한 3차원 열탄소성 해석', 대한용접학회지, 제10권, 제4 호, pp 250-258
  3. 이제명, 백점기, 윤동렬(2003). '용접구조물의 구속효과와 균열발생특성간 상관관계', 한국해양공학회지, 제17권, 제2호, pp 14-20
  4. Cannignani, C. Mares, R. and Toselli, G. (1999). 'Transient Finite Element Analysis of Deep Penetration Laser Welding Process in a Singlepass Butt-Welded Thick Steel Plate', Computer Methods in Applied Mechanics and Engineering, Vol 179, No 3, pp 197-214 https://doi.org/10.1016/S0045-7825(99)00043-2
  5. Kuwamura., H. (2003). 'Classification of Material and Welding in Fracture Consideration of Seismic steel Frames', Engineering Structures, Vol 25, No 5, pp 547-563 https://doi.org/10.1016/S0141-0296(02)00166-9
  6. Qianchu Liu (1997). 'Modelling the Effect cf Welding Residual Stresses on Fracture Toughness of a Welded Joint', International Journal of Pressure Vessels and Piping, Vol 72, No 2, pp 103-109 https://doi.org/10.1016/S0308-0161(97)80239-6