| 摘要 |
A method for the production of a homogeneous steel with reduced segregation of its ingredients by providing a continuous steel cast or steel ingot, the steel consisting of C</=1.0%, Si</=1.0% and Mn=0.2-3.0% plus one or more than two elements consisting of V</=0.2%, Nb</=0.2%, Mo</=1.0%, Cu</=2.0%, Cr</=2.0%, Ni</=3.0%, B</=0.002%, Ti</=0.1%, Al</=0.1%, and Ca</=0.01%, and the balance Fe and other unavoidable impurities, all percentages being by weight, subjecting the steel casting to a primary hot working at more than 20% reduction of area at an austenitic temperature range of less than 1200 DEG C. or at a temperature in the range from the Ar1 temperature to the Ac3 temperature in which two phases of austenite and ferrite coexist, and then to a soaking step wherein the core temperature of the steel casting stays at 1000 DEG C. or higher for a period of 30 minutes or longer.
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