| 摘要 |
In a heat treatment jig, a helical groove is engraved in the outer surface of a tubular body having a hollow cylindrical shape. The tubular body is formed from alumina. A metal wire as a heat treatment target is wound along the groove of the heat treatment jig. The heat treatment jig with the metal wire wound is installed in a heat treating furnace, and a heating process is performed. The metal wire heated to a predetermined heat treatment temperature extends due to thermal expansion. However, since the metal wire is heated in a state in which it is wound along the groove, the metal wires do not come into contact with each other. This can prevent the metal wires from adhering to each other at the time of heat treatment. |
