Effects of Sulfur Content and Sulfide-forming Elements Addition on Impact Properties of Ferrite-Pearlitic Microalloyed Steels

摘要

Longitudinal Charphy impact value of ferrite-pearlitic microalloyed steel was improved by large addition of S(0.05-0.1 mass/100), however, transverse Charpy impact value was rather deteriorated. This study focused On the sulfide shape, which have large effects on impact properties. The elements of Ca, Mg, Ti, and Zr Were added to ferrite-pearlitic microalloyed steels with 0.1 mass /100 S for sulfide shape control, and the their im- Pact properties were compared.