METHOD OF REGULATING METAL HEATING IN BELT-TYPE FURNACE Russian patent published in 2001 - IPC

FIELD: metallurgy, particularly, heat-treatment of ferrous metals, more precisely, processes of control of metal heating; applicable in production of sheet metal and low-carbon steel for cold deformation. SUBSTANCE: coils of cold-rolled blank plate from steel of 0.8 PS grade are arranged into stacks covered with muffles. Heating bell is installed and heated. Set temperature value as referred to bell thermocouple is 760 C (40 C above Ac1). Upon attaining temperature of 760 C, set value is reduced to 680 C and regulation is effected to attain temperature of 580 C (30 C above temperature of beginning of recrystallization of cold-rolled steel) as referred to stand thermocouple, holding at this temperature for at least 2 h. EFFECT: reduced consumption of energy carriers and higher production profitability. 2 tbl