| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method of a heat treatment type aluminum alloy wherein a welded blank excellent in ductility, and furthermore in press formability is advantageously obtained, by preventing a fracture in a stir-welded section and a heat-affected section, and also to provide the welded blank improved in press formability. SOLUTION: In the welding method, the heat treatment type aluminum alloy subjected to T4 tempering treatment is friction-stir-welded to obtain a welded blank. Then, such a welded blank is subjected to a reversion treatment. As a result, hardness of a base material is configured to become the smallest among the stir-welded section, the heat-affected section, and the base material. COPYRIGHT: (C)2005,JPO&NCIPI |
