Influence of Inoculation Method on Microstructure and Performance of Gray Iron Produced via Lost Foam Casting
Because of graphite morphology and matrix microstructure were unstable in the process of lost foam casting,influence of inoculation method on microstructure and performance of gray cast iron was studied by casting ladder samples and test bars attached to cast produced via lost foam casting.The results showed that graphite morphology,matrix microstructure were obviously improved and mechanical properties increased by instantly inoculating and controlling the suitable inoculation quantity.Instant inoculation of 0.25% ferrosilicon can eliminate undercooled graphite and refine matrix,tensile strength increase by 15 MPa than blast furnace inoculation.