• 제목/요약/키워드: Cr-Mo Steel

검색결과 552건 처리시간 0.032초

용접 공정에 따른 2.25Cr-1Mo강 용접이음부의 특성 변화에 관한 연구 (A Study on the Characteristic Change of 2.25Cr-1Mo Steel Welds for Various Welding Processes)

  • 방한서;오종인;방희선;김형
    • 한국해양공학회지
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    • 제19권1호
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    • pp.49-56
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    • 2005

  • 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.

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