METAL MATERIAL PROCESSING METHOD, STRUCTURE PROCESSED USING METAL MATERIAL PROCESSING METHOD AND ROTARY TOOL
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app pub date -
Mar 23, 2012
filing date -
Dec 24, 2008
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Abstract
A metal material processing method includes arranging two metal materials to face each other in a processing portion and inserting a distal end of a rod-shaped rotary tool into the processing portion while rotating the rotary tool, the two metal materials are processed. The distal end of the rotary tool has a probe protruding in a central portion and a shoulder in a peripheral portion, and the probe and the shoulder are constituted by different materials in at least surface portions that are in contact with the metal materials.
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