| 摘要 |
<p>The present invention relates to a friction stir welding method and a structural body which is formed using a friction stir welding method. In particular, the present invention is directed to a friction stir welding method and a structural body made of an aluminium alloy extruded frame member, such as is used for example in a railway vehicle, formed by friction stir welding of a number of extruded frame members. Joining is performed by abutting a first member (101) with a second member (102) by contacting a downwards facing surface of an overlapping portion of a first member which projects above one face of the other member in the lateral direction in and an upwards facing surface of a second member in such manner that the downwards facing surface and the upwards facing surface are in slideable contact before joining and said first and second member are rotatable, and carrying out a friction stir welding to join the members to form a frame structure.</p> |
