| 摘要 |
An ultralow-iron-loss grain oriented silicon steel plate remarkably improved in the undercoating adhesion onto the matrix surface, remarkably reduced in iron loss as compared with the prior art materials and also excellent in magnetic strain characteristics can be produced at a low cost with a high producibility by forming, at the boundary between the surface of a matrix and a tension isolating coating of a silicon steel plate, a boundary layer such as a layer of a nitride/oxide of at least one element of Fe, Si, Al and B or an ultrathin undercoating comprising a nitride/oxide of at least one element of Fe, Si, Al and B finely dispersed in the coating component same as the tension isolating coating, optionally after dissolving the matrix surface by dipping the steel plate in an aqueous solution of chlorides mainly comprising SiCl4 or after conducting flattening or pickling in an aqueous solution of SiCl4. |
