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

J. Ocean Eng. Technol. 1999;13(3):49-56.

Jeong, Ho-Sin;Eom, Dong-Seok;Lee, Hae-U;

후판 용접부의 횡균열 발생 방지에 관한 연구(I)

정호신;엄동석;이해우;

부경대학교;부산대학교;삼성 중공업;

Keywords: Diffusible Hydrogen Content, Weld Metal Transverse Crack, 3 Point Bending Type Crack Test, Transverse Crack Sensitivity, Restraint

핵심용어: 확산성 수소 함유량, 용접금속 횡균열, 3점 굽힘형 균열시험, 횡균열 감수성, 구속도

Abstract

Welding is a reliable process and is mainly adopted for fabricating heavy structures. Recently, transverse cracks in the weld metal is serious problem, and they affect cost, efficiency, safety and joint reliability for various welded structures. In this view of point, this study investigated the potential factors for weld metal transverse crack. The main results obtained are as follows; 1) The content of diffusible hydrogen in the commercial flux cored are welding wire was remarkable change by manufacturer. 2) The diffusible hydrogen content was thd main factor for weld metal transverse cracks. 3) Weld metal was immune to transverse cracking under the condition of low diffusible hydrogen content of high restraint condition. 4) The factors for weld metal transverse crack would be the content of diffusible hydrogen and restraint of weld joint.