Grain Refining of 409L Ferritic Stainless Steel Using Fe-Ti-N Master Alloy

摘要

A deliberately prepared Fe-Ti-N master alloy was employed as a grain refiner for the 409L ferritic stainless steel in an attempt to refine the as-cast solidification structure. It was found that the average equiaxed grain size of the sample deceased from 1503 to 303 μm and the proportion of equiaxed grain zone increased from 14 to 100 pct with increasing the Fe-Ti-N master alloy addition level to 2.5 wt pct. Hence, this method may have good prospects for industrial applications.