Patent ID: 7179416
Filing Date: 2007-02-20
Classification: C21D,F27B,F27D,G11B,H01F,H01L

Abstract:
1. A heat treatment apparatus comprising a holding device which holds an object of treatment which is a magnetic material, a generally horizontal heat treatment vessel which houses the object of treatment held by the holding device, a conveying device which conveys the holding device together with the object of treatment into the heat treatment vessel, a heating device which heats the object of treatment, and a magnetic field generating device which impresses a magnetic field onto the object of treatment wherein: the heat treatment vessel has a horizontally extending outer peripheral surface; the magnetic field generating device is a DC electromagnet having an air core coil which is wound around the heat treatment vessel so as to surround the outer peripheral surface of the heat treatment vessel; the direction of the magnetic field generated by the magnetic field generating device in a region in which the object of treatment is heat-treated and the conveying direction of the conveying device in which the object of treatment is conveyed into the heat treatment vessel are in parallel with each other, and are in parallel with the horizontal direction of the entire heat treatment apparatus; and the heat treatment is carried out so that the main surface of the object of treatment is in parallel with the direction of the magnetic field generated by the magnetic field generating device in the heat treatment region.