The roles the rare earths played in cast iron are summarized,and the applications of them in white cast iron,grey cast iron,malleable cast iron,vermicular cast iron and nodular cast iron are described in details,and the action mechanisms of rare earths in various kinds of cast iron are expounded.At the same time,combined with the scientific research work in recent years,a more efficient rare earth additive"rare earth ferroalloy"was applied to cast iron through master alloy addition method,which solved the problems of large burning loss,low yield and so on during adding the rare earths to the cast irons.
cast ironrare earthrare earth additiverare earth cast iron
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