HEAT TREATMENT JIG AND METAL WIRE HEAT TREATMENT METHOD
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United States of America Patent
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Jun 20, 2014
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Jan 27, 2012
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Abstract
The present invention provides a heat treatment jig. A metal wire as a heat treatment target is to be wound around the jig. The jig comprises a cylindrical tubular body whose outer wall surface has a helical groove formed along a circumferential direction to wind the metal wire. A depth of the groove is larger than a length at which the metal wire will isolate from the groove when the metal wire wound along the groove at room temperature is thermally expanded by being heated to a predetermined heat treatment temperature.
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