Iron based alloy material for thixocasting process and method for casting the same

摘要

An iron based alloy material for a thixocasting process and a method for casting the material which extends the service life of dies by inhibiting solidification contraction, and in which casting defects such as size variations and cracks can be inhibited. The material comprises 1.6 wt %<=C<=2.5 wt % and 3.0 wt %<Si<=5.5 wt %, and a carbon equivalent (the value of CE) defined as "C(wt %)+1/3Si(wt %)" of 2.9 to 3.5. This material is made to be in a half-melted state with 35 to 50 wt % of a solid phase to be cast under a pressure load.