Laser roll joining method for dissimilar metals and laser roll joining apparatus

摘要

An object is to provide a laser roll joining process for dissimilar metals capable of improving the joining strength of a joint by increasing the amount of generation of ductile intermetallic compound and a laser roll joining equipment. A laser roll joining process for dissimilar metals for joining a first metal sheet 3 and a second metal sheet 4 of different materials held in non-contact state by after only the first metal sheet 3 is heated by laser irradiation, pressing a heated portion of the first metal sheet 3 against the second metal sheet 4 with a pressure welding roller 15 so that they are brought into a firm contact with each other and subjected to plastic deformation, wherein a joining portion between the first metal sheet 3 and the second metal sheet 4 is cooled.