A Study on Prevention of Weld Transverse Crack for Thick Plate(Ⅱ)

J. Ocean Eng. Technol. 1999;13(3):57-67.

Jeong, Ho-Sin;Gang, Seong-Won;

후판 용접부의 횡균열 발생 방지에 관한 연구(Ⅱ)

정호신;강성원;

부경대학교;부산대학교;

Keywords: Diffusible Hydrogen Content, Weld Metal Transverse Crack, CTS Test, Transverse Crack Sensitivity of Fillet Weld, Thermal Severity Number

핵심용어: 확산성 수소 함유량, 용접금속 횡균열, CTS 시험, 필렛 용접부 횡균열 감수성, 열적 구속도 지수

Abstract

Welding is widely applicable and reliable process and is mainly adopted for fabricating heavy structures. Recently, weld metal transverse cracks in butt and fillet weld joint is a serious problem, and they must be eliminated for improving weld joint reliability. The weld metal transverse crack susceptibility of butt and fillet joint was carried out by cantilever type tensile crack testing jig and CTS test. In this view of point, this study investigated the potential factors for weld metal transverse crack. The main results obtained were as follows: 1. The content o fdiffusible hydrogen in weld metal played an important role for weld metal transverse cracks. 2. From cantilever type tensile crack tests, it was pointed out that the higher the diffusible hydrogen content and tensile restraint, the more susceptible to weld metal transverse craking. 3. The TSN(thermal severity number) and diffusible hydrogen were important factors for determining weld metal transverse cracks in fillet weld joints.