Method of producing rim-stabilized steel ingots.

摘要

A rim-stabilized steel ingot is produced by teeming a rimming-type steel into an ingot mold until the mold is about 80 to 95% full, whereupon teeming is interrupted to allow a rimming action of from 1/2 to 15 minutes. Thereafter, teeming is recommenced until the mold is full, and during this recommenced teeming molten aluminum is added to the mold in an amount sufficient to semi-kill the molten steel and yield from 0.002 to 0.008 dissolved aluminum in the ingot core. Cold rolled products produced from such an ingot will exhibit forming characteristics equivalent to those produced from ingots having a fully killed core in certain applications. Such good forming properties are attributable to the formation of small, finely dispersed nonmetallic inclusions comparable to those developed when the core is fully killed with molten aluminum.