continuous casting method of the thin-walled steel hollow ingot

摘要

continuous casting method of the thin-walled steel hollow bars mainly with ratio of diameter to thickness of the wall, equal to 15 to 40, which includes heating u0437u0430u0442u0440 awka, u0437u0430u043bu0438u0432u043au0443 liquid metal u043au0440u0438u0441u0442u0430u043bu043bu0438u0437u0430u0442u043eu0440 dorn and the lengthening bars with the fact that, in order to ensure the stability of process heat appetizer to u0442u0435u043cu043fu0435u0440u0430u0442u0443u0440u044bt = 530 + 8D / b - 2,5t, where t is the temperature of heating free,hail; d is the diameter of the bars, mm; b - wall thickness hollow ingot, mm, t is the temperature of heating the liquid metal, the hail.