METHOD FOR MAKING THIN STRIP Russian patent published in 2004 - IPC

FIELD: metallurgy, namely manufacture of thin strip in continuous casting machines with two rolls-cylinders. SUBSTANCE: method comprises steps of arranging rolls with mutual gap; supplying melt steel into cavity restricted by cylinders; keeping steel level higher than site between cylinders; rotating cylinders one towards another with circumferential velocity determined according to formula V = kD/τ_з, where V - circumferential velocity of cylinders, mm/min; K - proportionality coefficient equal to 0.35 - 0.85; D - diameter of cylinder,mm; setting thickness value of blank formed by means of cylinders according to relation τ_з = k_зh1,4-2,00

where τ_з - time period of solidifying blank, min; k_з - solidification factor equal to 0.0012; h₀ - thickness of blank, mm. Calculation of process parameters according to given relations provides arrangement of convergence point of solidified skins of blank at optimal level over site between cylinders. It prevents metal breaking under cylinder and non-desired widening of blank during its further reduction by means of cylinders. EFFECT: enhanced reliability of process, improved quality of strip. 2 ex