Fusion crust characteristic of additional SiC particle in cast iron

Abstract

There have been many researches about improving the properties of materials by adding SiC particle in cast iron in recent years. However, researches on the appearance change, action mechanism, etc. of SiC particle in cast iron have not been deepened. We mainly study the appearance change characteristics of additional SiC particle in cast iron melt and its improvement effect in the paper. The results show that additional SiC particle reacts in cast iron solution, and its size decreases. The phenomenon is summarized as fusion crust characteristic of SiC particle in cast iron. The reaction product of SiC particle fusion crust process can be used as additional nucleation of graphite precipitated core during solidification and the reduced SiC particle after reaction also can be used as additional nucleation of nucleation center for graphite and austenite. Meanwhile, SiC is distributed in a scattered mode, and pin inhibits grain growth in grain boundary.