LOW SURFACE ROUGHNESS CAST STRIP AND METHOD AND APPARATUS FOR MAKING THE SAME

OF THE DISCLOSURE LOW SURFACE ROUGHNESS CAST STRIP AND METHOD AND APPARATUS FOR MAKING THE SAME 5 A THIN CAST STRIP IS FORMED HAVING AT LEAST ONE MICROSTRUCTURE SELECTED FROM THE GROUP CONSISTING OF POLYGONAL FERRITE, ACICULAR FERRITE, WIDMANSTATTEN, BAINITE AND MARTINSITE, A SURFACE ROUGHNESS OF LESS THAN 1.5 MICRONS RA. AND A SCALE THICKNESS OF LESS THAN ABOUT 10 MICRONS BY APPLYING A MIXTURE OF WATER AND OIL ON THE WORK ROLLS OF THE HOT ROLLING MILL, PASSING THE THIN CAST STRIP AT A TEMPERATURE OF LESS THAN I 100' C THROUGH THE HOT ROLLING MILL 10 WHILE THE MIXTURE OF OIL AND WATER IS APPLIED TO THE WORK ROLLS, AND SHROUDING THE THIN CAST STRIP FROM THE CASTING ROLLS THROUGH THE HOT ROLLING MILL IN AN ATMOSPHERE OF LESS THAN 5 OXYGEN TO FORM THE THIN CAST STRIP.