摘要:
A method of bonding the contiguous windings of a wound core of magnetic strip material by the steps which include coating said strip with a silicate solution and drying in situ prior to or after winding in to said core. During a subsequent stress relief anneal, the silicate fuses the core togethe thereby effecting the bond.
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.