IN LINE HEAT TREATMENT OF HOT-ROLLED STEEL ROD

摘要

Hot rolled steel rod, containing less than 0.4% C, is cooled by a prescribed, interrupted-cooling procedure for producing rod with enhanced ability to receive cold work. In cooling from the austenite range, the rod is held within a specified, narrow temperature range for a period of at least about 2 minutes. The particular holding range is shown to be a function of carbon content, whereby low carbon steels (0.28% C) are held at a prescribed temperature above 1,450 DEG F, while medium carbon steels are held at a temperature of about 1,250 DEG F.