Method of producing potassium silicate glass coating for ferrous magnetic sheet stock
    5.
    发明授权
    Method of producing potassium silicate glass coating for ferrous magnetic sheet stock 失效
    生产硅酸镁玻璃涂层的方法

    公开(公告)号:US3582409A

    公开(公告)日:1971-06-01

    申请号:US3582409D

    申请日:1970-02-18

    申请人: ARMCO STEEL CORP

    发明人: KOHLER DALE M

    摘要: METHODS OF MAKING POTASSIUM SILICATE GLASS COATINGS FOR SILICON STEEL MAGNETIC SHEET STOCK, WHEREIN THE SHEET STOCK, HAVING ON ITS SURFACES A FILM COMPRISING A MILL GLASS LAYER, OR PHOSPHATE COATING LAYER, OR LAYERS OF BOTH, IS COATED WITH AN AQUEOUS SOLUTION OF POTASSIUM SILICATE HAVING A SILICA TO POTASSIUM OXIDE RATIO OF FROM ABOUT 2:1 TO ABOUT 2.5:1 AND HIGHER. THE COATED STOCK, IN STRIP FORM, IS THEN HEATED RAPIDLY TO A TEMPERATURE OF FROM ABOUT 1000*F. TO ABOUT 1650*F., WHEREBY TO FORM ON THE STOCK A SMOOTH, HEAT-RESISTANT, PROTECTIVE, INSULATIVE GLASS HAVING A TOTAL FINAL THICKNESS OF FROM .04 MIL TO ABOUT .2 MIL, AND WHEREBY TO IMPROVE THE MAGNETIC PROPERTIES OF THE STOCK.