This paper proposes a new flaw inspection technique by use of hysteresis heating and an infrared imaging device. If a periodical magnetic field is applied to a ferromagnetic material, it is heated by iron loss due to the m agnetic hysteresis as well as the Joule heat due to the eddy current. When the frequency of the magnetic field is not high and the magnetic permeability is large, the hysteresis heating is dominant, which enables us to uni formly heat a larger part of the specimen up to the deep region. ...
英字タイトル:
Visualization of Surface Defects of Steel Using Iron Loss And Infrared Thermography