Abstract

The feasibility of underwater wet arc welding process is experimentally investigated by using high titanium oxide type electrodes and TMCP steel plates as base metal. It is assertained the tis process may be put to practical use. Main results are summarized as follows; (1) Sound underwater weld can be obtained by skilled welding operator, if proper welding conditions are selected. (2) In underwater wet arc welding process, the mechanical properties of HAZ are depend upon welding condition and the optimum welding condition can obtained. (3) The maximum hardness in the HAZ of TMCP steel plates is increased significantly in this welding process.

Keywords

• underwater welding;
• underwater wet arc welding;
• welding conditions;
• HAZ;
• hardness;
• bead appearances;
• bend tes

• 수중용접;
• 습식수중아크용접;
• 용접조건;
• 열영향부;
• 경도;
• 비드외관;
• 굽힙시험;