| 摘要 |
PROBLEM TO BE SOLVED: To make welding and surface layer reforming possible by friction stir for a workpiece composed of a high melting point material, in a friction stir welding method in which a workpiece is welded through plastic flow by frictional heat produced between a rotary tool and the workpiece by inserting the rotary tool into the workpiece and rotatably moving it. SOLUTION: Welding or reforming by friction stir is performed with a weld zone s heated by irradiating it with a laser beam, or with an insert 3 placed between welding faces, or with the above two means combinedly used. Irradiation of the laser beam fluidizes even a high melting point material. Also, placing the insert between the welding faces causes adiabatic effect to be imparted between the insert and the workpiece, preventing the frictional heat from diffusing. COPYRIGHT: (C)2006,JPO&NCIPI |
