| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming an excellent weld zone through two processes in friction stir welding by abutting members of a different thickness. SOLUTION: A first member 10 having a thickness of T<SB>1</SB>and a second member 20 having a smaller thickness of T<SB>2</SB>are placed on a table 40 to form an abutting part 30 with a difference in level. In the first process, friction stir welding is performed on the difference-in-level part using a columnar tool 100 to form a projection substitution part 150. In the second process, friction stir welding is performed on the projection substitution part 150 using a friction stir welding tool 200 to obtain the excellent weld zone 250. COPYRIGHT: (C)2007,JPO&INPIT |
