| 摘要 |
PURPOSE:To provide the method where end surfaces of iron/aluminum multi- layered clad steel sheets are welded by the laser beam without forming the brittle metallic compound and the weld zone. CONSTITUTION:In the butt welding of the end surfaces of iron/aluminum double layered clad steel sheets or iron/aluminum/iron triple layered clad steel sheets, the ferrous metallic layer 1 or the aluminum metallic layer 2 and filler wires 6a, 6b of same metal are placed at the butt part, and are irradiated with the laser beam 4 from the top to execute the welding. The irradiation of the laser beam is intermittently executed to control the heat input, preventing the formation of the compound at the weld zone. This constitution increases the width of the multi-layered clad steel sheet. The forming of the joined multi-layered clad steel sheets becomes possible. |
