Abstract: Effect of finishing rolling temperature on microstructure,texture,formability and surface ridging resistance of ultra-purified ferritic stainless steel 443 was investigated by means of optical microscope,EBSD and other analysis technologies.The results show that lowering the finishing rolling temperature promotes recrystallization of both hot rolled and annealed steel sheets,and makes the microstructure of final cold rolled-annealed sheet refined and homogenized.The γ-fiber texture in cold rolled-annealed state can be strengthened effectively by reducing the final rolling temperature,which is an effective way to improve the r value,cupping value,formability and surface ridging resistance.

Key words: ultra-purified ferritic stainless steel, microstructure, texture, formability, surface ridging resistance