| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electromagnetic steel sheet with a semi-organic insulating film which does not contain a chromium compound, and nonetheless is free from deterioration in corrosion resistance and water resistance, has excellent anti-powdering properties, flaw resistance, sticking properties, TIG weldability and punchability, and also has excellent appearance after stress relieving annealing. <P>SOLUTION: In the semi-organic insulating film composed of inorganic components and an organic resin, as the inorganic components, a Zr compound, a B compound and an Si compound are respectively contained by at ratios in a dry film; the Zr compound (expressed in terms of ZrO<SB>2</SB>): 20 to 70 mass%, the B compound (expressed in terms of B<SB>2</SB>O<SB>3</SB>): 0.1 to 5 mass%, and the Si compound (expressed in terms of SiO<SB>2</SB>): 10 to 50 mass%, and the balance organic resin is contained. <P>COPYRIGHT: (C)2011,JPO&INPIT |
