Property Evaluation of Butt Joint made by Hot-wire CO2 Arc Welding Method

摘要

The improvements of productivity, process flexibility and quality of welded joint are strongly demanded especially in the large-scale ship construction field since the total welding length exceeds several hundred kilometers. CO_2 arc welding with a high current, tandem CO_2 arc welding and submerged arc welding are generally used for a butt joint of thick steel plates in the field. However, there are some problems of an increase of heat input, deterioration of joint properties, small flexibility for its application. The purpose of this research is to study welding phenomena during hot-wire CO_2 arc welding and obtain the optimum welding conditions. Properties of the butt join made by hot-wire CO_2 arc welding was evaluated.