TWO INOCULATION METHODS FOR REFINING AS-CAST GRAIN STRUCTURE IN AUSTENITIC 316L STEEL

摘要

Two grain refining methods that introduced titanium nitride (TiN) into 316L melt by in-situ formation and by master alloy addition were designed, performed, compared and discussed. The master alloy method extended the equiaxed zone and improved the distribution of TiN in the casting (less clustering). However, this method showed less effective grain size refinement when compared to the in-situ method.