Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shinji Koga0
Atsushi Kato0
Mitsuo Fujimoto0
Ryoji Ohashi0
Date of Patent
November 9, 2010
0Patent Application Number
117171080
Date Filed
March 13, 2007
0Patent Primary Examiner
Patent abstract
The present invention is a friction stir welding machine adapted to perform solid phase welding on a welding portion of materials to be welded, by pressing a welding tool against the welding portion of the materials to be welded while rotating the welding tool, and forcing the welding tool to be advanced into a softened portion which is softened by a frictional heat while stirring the softened portion, wherein a coating made of aluminum nitride is formed on at least a region of the welding tool to be in contact with the materials to be welded.
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