METHOD FOR CONTINUOUS CASTING OF BILLETS IN CURVILINEAR TYPE MACHINES Russian patent published in 2003 - IPC

FIELD: ferrous metallurgy, namely continuous casting of billets in curvilinear type machines. SUBSTANCE: method for continuous casting of billets of low carbon steel in curvilinear type machines comprises steps of supplying low-carbon steel into mold; drawing billet out of mold and cooling it; determining water flowrate for secondary cooling zones at sides of large and small radiuses of machine according to relations and where F₁ is water flowrate for secondary cooling zones at side of large radius of machine, cu.m/h; F₂ is water flowrate for secondary cooling zones at side of small radius of machine, cu.m/h; V is billet drawing speed, m/min; I is mean value of axial chemical non-uniformity of billet; [C] - carbon content in steel, %; [Mn] - manganese content in steel, %; [S] - sulfur content in steel, %; [Al] - aluminium content in steel, %; 6.38; 1.29; -7.65; -0.91; -122.55; 21.10; 5.09; 18.77; 0.71; -21.89; 4.17; 146.99; -14.95 and 3.08 - empiric coefficients. EFFECT: lowered cost price of process for making continuously cast billets with minimally possible mean point of axial chemical non-uniformity for low carbon steels. 1 cl, 2 ex