| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a different metals-welding method capable of tightly attaching welding interfaces of materials to be welded, allowing the heat to be reliably transferred from a material of high melting point to a material of low melting point, and realizing consistent welding in the overlap welding of different metals to irradiate high energy beams to the side of the material of high melting point through defocus while the different materials of different melting points overlap each other. <P>SOLUTION: A material 2 of high melting point and a material 3 of low melting point which are different in melting point overlap each other, and are overlap-welded to each other by irradiating high energy beams 1 defocused on the surface on the material side of high melting point in a spot to perform the overlap-welding of these materials. By using a pressing means such as an air cylinder, a weld part is locally pressed in a tightly attaching direction of both materials from an irradiation surface of the high energy beams 1 and the opposite surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
