A Study on Metallurgical Properties and Fatigue Strength depending on Bead Height in SAW Butt Joints

SAW 맞대기 용접부의 야금학적 특성과 비드높이에 따른 피로강도 연구

  • 이해우 (삼성중공업 조선플랜트연구소 용접연구팀) ;
  • 신용택 (삼성중공업 조선플랜트연구소 용접연구팀) ;
  • 박정웅 (삼성중공업 조선플랜트연구소 용접연구팀) ;
  • 석한길 (삼척대학교 금속공학과)
  • Published : 1998.08.01

Abstract

This paper is a study on the fatigue Strength depending on bead height. According to the AWS CODE D1.1, reinforcement shall not exceed 1/8"(3.2mm) in height. Most of the bead heights exceed AWS rule in actual welding. So we estimated the fatigue Strength of the as-welded specimens and the removed bead specimens of which height is 3mm with SAW 2 pole process. As a result, this paper presents that fatigue Strength is not concerned with as welded condition and removed 3mm bead height, also fatigue Strength obtained as welled specimens are satisfied with those proposed by the UK DEN, DNV and AWS.

본 논문은 서브머지드 아크 2pole 용접시 용접비드 높이에 따른 피로강도와 야금학적 특성을 고찰하였다. AWS(American Welding Society) Code D1.1에 의하면 피로강도 측면에서 비드높이가 1/8"(3.2mm)를 초과하지 못하도록 규정하고 있으나, 실구조물 용접시 대부분 비드높이가 이 규정을 초과하고 있다. 따라서 보 연구에서는 as-weld상태에서의 피로시험편과 비드높이 3mm인 피로시험편을 제작하여 야금학적 고찰 및 피로강도를 비교 평가하였다.

Keywords

References

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  2. American Welding Society 8th v.1 Welding Handbook
  3. The Welding of Fine-Grained Structural Steels for Operating Temperatures Low at -60℃ with reference to MAG Filler 6NiMnSi 9.4. Welding International v.9 Schuster;J.;Gentzsch;O.
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  5. 溶接構造要覽 在藤邦彦編
  6. Journal of Japan Welding Socity v.47 no.9 Effect of Size and Frequency on Fatigue Properties of SM50B Butt Welded Joint S. Yoshida(et al.)