PROCESS FOR PRODUCTION OF ANISOTROPIC ELECTRIC STEEL

• Main Authors: KAZADZHAN L.B, NOSOV A.D, NOSOV S.K, SHARIPOV R.F, TSYRLIN M.B, LOBANOV M.L
• Format: Patent
• Language: English
• Published: 20.09.1999
• Edition: 6
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

FIELD: ferrous metallurgy. SUBSTANCE: process includes smelting, hot rolling, decarbonization, double cold rolling, retarded heating during primary recrystallization period, and final high- temperature annealing. To increase magnetic properties and stabilize secondary recrystallization of steel, heating temperature of hot rolling (T) is set in dependence of aluminum content in steel expressed by relationship: T = 1190 + 4x10% Al . Coiling is accomplished at 520- 570 C. Retarded heating is effected (i) after final cold rolling with rate 5- 15 C/hr over a temperature range of 400 to 700 C with probability of decarbonization in smelting stage or (ii) after heat treatment of strip plate with initial, intermediate, or final thickness and probability of addition of 0.2-0.7% of copper to steel. EFFECT: enhanced process efficiency. 3 cl, 2 tbl