Influence of Cu and Ni on the Hot Ductility of Low C Steels with Respect to the Straightening Operation When Continuous Casting

Cu-containing steels can suffer from hot shortness unless Ni is added to protect them but whether this problem also influences the straightening operation not clear. Previous work on ductility has found that only when tensile samples are oxidised any deleterious influence of copper be found. However, paper shows oxidation essential. It more complex than and, as Cu been suggested for TRIP at levels up 2.5% increase their strength and ductility, a greater understanding required, both cracking during straightening. The present explores behaviour alloyed with in temperature range, 700–1000 °C, tested air an argon atmosphere. Segregation sulphides grain boundaries occurred allowing formation fine Cu2S particles austenite favouring intergranular failure was pronounced under oxidising conditions required strain. concluded addition, well causing higher temperatures will cause problems range sensitive grades steel although different they nevertheless interrelated provided there sufficient Ni, may avoided.