Abstract: A method of continuously casting molten metal by continuously drawing a strand, wherein the thickness of said strand is continuously reduced at a reduction rate (x) in a region between a point of time when the center of said strand has a temperature corresponding to a solid-phase ratio of 0.1 to 0.3 and a point of time when said temperature has dropped to a level corresponding to a solid-phase ratio at a limit of fluidization, provided that said reduction rate (x) satisfies the following equation (1):0.6.xi..ltoreq.x.ltoreq.1.1.xi. (1)where.xi.=4/r, 1.cent.r.ltoreq.4,r is a flatness ratio of the strand,x is a reduction rate (mm/min).

Abstract: A method of the continuous casting of molten metal by continuously withdrawing a strand is disclosed. The method is characterized in that the thickness of the strand is continuously reduced at a rate of 0.5 mm/min to less than 2.5 mm/min in the region between the point of time when the center of the strand has a temperature corresponding to a solid-phase ratio being within the range of 0.1 to 0.3 and the point of time when said temperature has dropped to a level corresponding to the solid-phase ratio at the limit of fluidization, while substantially no reduction in thickness is effected in the region between the point of time when the center of the strand has a temperature corresponding to the solid-phase ratio at the limit of fluidization and the point of time when said temperature has dropped to the solidus line.

Abstract: A method for producing steels by continuous casting, in which an addition material composed of an addition metal or alloy in the form of wire and a cover metal covering the addition metal or alloy is dissolved at a predetermined depth of the molten steel in a mold for continuous casting, and the cover metal prevents the addition metal from dissolving at undesired position in the molten steel, thus very advantageous for production of high grade steels and cored steels.

Abstract: A method for producing steels by continuous casting, in which an addition material composed of an addition metal or alloy in the form of wire and a cover metal covering the addition metal or alloy is dissolved at a predetermined depth of the molten steel in a mold for continuous casting, and the cover metal prevents the addition metal from dissolving at undesired position in the molten steel, thus very advantageous for production of high grade steels and cored steels.