The method of continuous casting of steel

The present invention provides a method drawn from the mold without slab obtained not to cause breakage and cracking of the internal expansion intentionally, after having pressed the continuous casting uncured layer of the slab to reduce center segregation of the slab the method of continuous casting of steel. The slab (10) of the solidified shell (11) before reaching a thickness of 15mm slab roller opening support roller (6) is set to the same positive value below the mold, after the opening degree of the roller stepwise to increase the total amount of a slab to expand the expansion of 20mm ~ 3mm, then, toward the downstream side in the casting direction in the range 0.5m to 5.0m ~ roller set to a constant opening degree, then, in order to meet the speed reduction casting speed Modes of volume of 0.3mm · m / min2 ~ 1.0mm · m / min2 conditions using reduction roller (7) the solid phase was 0.2 to 0.9 slab thickness at the center portion of the slab pressed at least once.