Fedosov A. Improvement surface quality of slabs made of steel grades, disposed to cracking, and casting in curved CCM

Research object - a process of steel continuous casting in curved CCM. Research subject - mechanism of formation and shrinkage of slab casted in curved CCM. The purpose - determination of rational technological parameters of continuous casting of steel grades, disposed to cracking, for surface quality of slabs improvement. Methods - research computation and experimental methods of the process of slab formation during its casting in curved CCM. Novelty - the equation connected CCD matrix response rate and temperature of viewing object is developed; the new method of the slab surface temperature optical measuring by devices with CCD matrix is offered; the new simplified method of calculation of slab mold taper rational values for casting of steel grade with the carbon content of 0,1 - 0,17 % is offered; the method of calculation of local heat transfer coefficients distribution on the slab surface in secondary cooling zone of curved CCM is improved. Results - the rational values of mold taper for casting of steel grade with the carbon content of 0,1 - 0,17 % is offered; The package of software for the calculation of terms of slab cooling with the use of the improved model of local heat transfer coefficients determination is made; it is suggested to turn the nozzles of secondary cooling zone on the angle of 4 - 6 degree with the purpose of surface quality of slabs improvement; introduction of dissertation results in "Azovstal" Iron and Steel Works allowed to reduce plate offal for 10% (relatively). Sphere of use - ferrous metallurgy (steel continuous casting).