Modeling Of Continuous Casting By Combined Process Of Mccb + Esr

Abstract

Проведено компьютерное моделирование комбинированного процесса непрерывной разливки с электрошлаковым обогревом рельсовой стали. Применена программа THERCAST ® , позволяющая учесть особенности конструкции конкретной машины непрерывного литья. Расчетным путем установлены исходные параметры не только скорости разливки, но и вторичного охлаждения и их влияние на глубину жидкометаллической ванны непрерывнолитого слитка. Рассмотрены особенности совмещения на машине непрерывного литья заготовок отдельных ручьев с разной скоростью вытягивания слитка. Библиогр. 10, табл. 1, ил. 4. К л ю ч е в ы е с л о в а : непрерывная разливка; ЭШП; вторичное охлаждение; осевая неоднородность; гиперэвтектоидная рельсовая сталь

Innovative Solutions for Manufacturing High-Quality Rails in Ukraine

“…The results of mathematical modeling of the formation of a round-shaped continuously cast ingot with a diameter of 500 mm of carbon steel at different casting rates (200-500 mm/min in 100 mm/ min increments) have shown almost li near dependence of the depth of both the liquid metal bath and the two-phase zone on the casting rate [17]. The direct dependence of the metallurgical length of the liquid metal bath depth on the casting rate has been established to remain unchanged, even with the influence of the four se condary cooling zones taken into consideration (the lengths of the secon dary cooling spray zones are assumed equal to 5000 mm (zone 1); 6000 mm (zone 2); 11000 mm (zone 3); and 11000 mm (zo ne 4) (the last two are consecutive sections of coo ling, which differ in the intensity of water flow), which corresponds to the geometry of Continuous Casting Machine of PSJC Dzerzhinsky Dniprovsky Metallurgical Plant, Kamianske).…”

“…The estimated reduction of the two-phase zone depth from 29 m to 11 m (almost three times) as a result of slowing the rate of casting into a 500 mm diameter mold down to 300 mm/min suggests that the proposed hybrid slag heating process [17] а b c d can give the second life to a semi-continuous casting of forging ingots with a large cross section on vertical machines [18]. A significant reduction in the fraction of liquid metal in the two-phase zone means that the proposed method for reducing the casting rate to prevent the formation of axial heterogeneity and shrinkage effects is quite promising.…”