Tensile strength of thick plate welded joint with weld HAZ softening for hight heat input welding

대입열 용접에 의한 HAZ연화부를 갖는 극후판 용접이음부의 인장강도 평가

In recent time there are vigorous requirement for the use of thick steel plate in various industrial fields including shipbuilding industry. Application of TMCP steel plates, especially, is increase progressively. As a welding process for thick steel plate assembly high heat input welding method is used. However, HAZ softening of TMCP steel plates has a possibility to reduce the strength of welded joint. In this study, therefore, tensile strength of TMCP welds had softened HAZ was examined using numerical calculation and experiment.