Precipitation Behavior in Ultra-Low-Carbon Steels Containing Titanium and Niobium

摘要

This work revealed the basic mechanism for thestabilization of carbon in ultra-low-carbon (ULC) steels that containmoderate S (0.004 to 0.010 wt pct), adequate Ti (0.060 to 0.080),and low Mn (≤0.20). During cooling through the austenitic regionto the ferritic, the initially formed sulfide particles (TiS) undergo anin situ transformation into carbosulfides (H-Ti4C2S2) by absorbing C and Ti.