Effect of Nb, Ti on the Microstructure and Texture of As-Cast and As-Rolled Ferritic Stainless Steel

The effect of different niobium and titanium addition contents on the microstructure and texture of as-cast and as-rolled ferritic stainless steel was studied. The research results show that the as-cast microstructure was refined obviously by Nb addition. The addition of double stable elements of Nb and Ti strongly promote the ratio of grain equiaxed and grain refinement. Addition of Nb and Ti can not only refine the microstructure of casting, but also the as-rolled microstructure. The addition of only Nb or Ti all can delay the recrystallization process, but Ti has more significant function, while recrystallization process of the plate can be obviously delayed by the simultaneous addition of Nb and Ti.