struggling independent of magnetic thin plate manufacturing method

摘要

A thin steel plate manufactured through ordinary steps is placed in an atmosphere which contains SiCl4, and a silicon permeation treatment is effected at a silicon permeation temperature of 1100 to 1200oC for a predetermined period of time. At this moment, the heating rate in the SiCl¿4?-containing atmosphere is set to at least 50?o¿C per minute at a temperature of 1000oC or above. This makes it possible to produce a thin magnetic steel plate of a high permeability without internal flaw.