METHOD OF PRODUCING ROLLED STEEL HAVING HIGH-STRENGTH AND LOW-IMPACT TRANSITION TEMPERATURE

摘要

Rolled steels characterized in their as-rolled condition by an unexpected combination of high-strength and low-impact transition temperature. The product is produced by rolling a steel workpiece containing both austenite and ferrite, preventing complete recrystallization at any time thereafter, and continuing the rolling of said workpiece as it is cooling in the temperature range between the Ar1 temperature and 600 DEG F.