Influence of microalloying on the coiled strip (strength class K56) produced in a casting and rolling complex

The influence of Nb and Ti microadditions on the microstructure and mechanical properties of coiled strip (strength class K56) produced by continuous casting and immediate rolling in a casting and rolling complex at AO OMK Stal’ (Vyksa) is investigated. High niobium content (0.08%) improves the cold strength of the steel in impact-flexure tests and drop tests at temperatures down to–80°C. Adding titanium to steel with 0.04% Nb reduces its strength but improves its plasticity, ductility, and cold strength down to–60°C.