专利名称：Friction stir welding method发明人：Masakuni Ezumi申请号：US11477467申请日：20060630
公开号：US20070199978A1公开日：20070830
专利附图：
摘要：There is provided a friction stir welding method for forming a satisfactory weldportion by two steps when members having different thicknesses are butted togetherand friction stir welded. A first member having a thickness Tand the second memberhaving a thickness T, which is smaller than the thickness T, are placed on a table to form a
stepped butt portion . In a first step, metal is transferred from the first member to thesecond member to form a convex substitute portion in the stepped portion by rotatinglymoving a columnar tool along the butt portion . In a second step, friction stir welding isperformed on the convex substitute portion to obtain a satisfactory weld portion byusing a friction stir welding tool
申请人：Masakuni Ezumi
地址：Hofu-shi JP
国籍：JP
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