| 摘要 |
PURPOSE:To effectively reduce iron loss of a steel by curving the steel sheet as arc-state so as to become equal distance to an electron beam source to irradiate the electron beam on the surface of the steel sheet at uniform intensity at the time of improving the iron loss characteristic by irradiating the electron beam on the grain-oriented silicon steel sheet in a vacuum chamber. CONSTITUTION:The grain-oriented silicon steel sheet S is introduced in the vacuum treating chamber 2 and the electron beam 11 is scanned to irradiated to crossing direction to rolling direction of the steel sheet S to subdivided magnetic domain of the steel sheet and the iron loss characteristic is improved. In this case, by holding facing posture to sheet width direction of the steel sheet S to the irradiating source of the electron irradiating device 10 to the recessed shape along the arc centering the irradiating source with a steel sheet bending device 12, the center part and the edge parts to the width direction of the steel sheet S become the equal distance to the irradiating source and the electron beam 11 is uniformly radiated to width direction of the steel sheet S, and the magnetic domain in the steel sheet S is subdivided to reduce the iron loss. |
