| 摘要 |
A method of friction welding suitable for joining workpieces and forming a joint region therebetween comprises the steps of:- (i) Offering a probe 1 of material harder than the workpiece material to the workpiece surfaces in the joint region, a head region of the probe contacting one or both workpieces; (ii) Causing a rotational movement between the probe and the workpieces while urging the probe and workpieces together whereby frictional heat is generated in the joint region so as to create a plasticised region in the workpieces around the probe; (iii) Removing the probe or advancing the probe along the joint region and allowing the plasticised region to solidify and thereby join the workpieces together. The method is characterised in that the head region of the probe incorporates a plurality of protrusions 2 adapted to penetrate the workpieces. Such protrusions 11 may be crescent shaped. |
