Iron - Sulphur - Titanium

Nataliya Bochvar and Lazar Rokhlin

Introduction

The presence of sulphur in iron and steel leads commonly to decrease of strength, ductility and corrosion resistance. The steels containing sulphur incline to cracking at high temperatures of hot working. Therefore, the sulphur content in commercial steels is strictly limited in steelmaking processes. Titanium additions to the steel melts result in precipitation of disperse spherical complex sulphides which are modificators of cast structure and decrease the sulphur danger. For successful control this process, the Fe-S-Ti phase diagram is of a great importance.