METHOD FOR CONTROLLING PERFORMANCE OF UNIDIRECTIONALLY SOLIDIFIED MATERIAL

摘要

PURPOSE:To obtain a cable stock which is free from dispersion in transmission characteristic from a unidirectionally solidified material to be cast by a unidirectional solidification method by controlling the tensile strength electrical coductivity of the unidirectionally solidified material by the solidifying speed at the time of casting. CONSTITUTION:A unidirectionally solidified ingot of oxygenfree copper is produced by, for example, a continuous casting method using a heated casting mold. Molten copper 4 in a casting furnace 3 is admitted into the casting mold 2 provided with a heating element 1 and the drawn-out ingot 6 is cooled with the water gushed from coolers 5 by which the molten metal 4 in contact with the ingot 6 is solidified in the casting mold 2. The solidified ingot is drawn by pinch rolls 7. The tensile strength and electrical coductivity of the ingot 6 having the unidirectionally solidified structure are controlled by the solidifying speed at the time casting. The tensile strength and electrical coductivity of the ingot 6 worked after the casting are controlled by the solidifying speed at the time of casting and the reduction ratio at the time of working. The cable stock having the excellent transmission characteristics is thereby obtd.