ANISOTROPIC ELECTRICAL STEEL PRODUCTION PROCESS Russian patent published in 1998 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: invention relates to electrical steel applicable to manufacture magnetic conductors in electrical devices. Principal characteristic of anisotropic steel is its magnetism. It improves with increased perfection of crystallographic texture of secondary recrystallization { 110} <001>. This perfection determines chemical analysis of steel and process operation conditions. In order to improve magnetism of steel, the latter containing, in wt %, carbon 0.020-0.060, silicon 2.60-3.20, aluminum 0.008-0.030, phosphorus 0.015-0.100, and other inevitable admixtures is processed according to technology involving consecutively performed smelting of steel with indicated analysis, hot rolling, etching of hot-rolled stock, first cold rolling, decarbonizing annealing, second cold rolling, applying heat-resistant coating, and high-temperature annealing. This technology, with steel thickness 0.35 mm, gives rise to specific magnetic reversal energy loss P_1,7/50 1.28-1.32 W/kg. In a similarly produced steel not alloyed with phosphorus the same characteristic is 1.40-1.50 W/kg. EFFECT: improved magnetism. 1 tbl