抄録
The effects of alloying elements on graphite (TEG) and cementite eutectic temperature (TEC) of cast iron, and the difference between them (ΔTE) were investigated. A thermal analysis system consisting of three cups was used to measure eutectic temperature. The order of the expanding effect on ΔTE is as follows : Si> Al> C<2.9%> Cu> Co> P> Ni> C>2.9%. The order of the narrowing effect on ΔTE is as follows : B> S>0.44%> V> Cr> S<0.44%> Mn> Nb> Ti> Sn> W> Mo> Sb. Mn and Ti form sulfide, so that they expand ΔTE for a low content of element and narrow ΔTE when the content is less than the transition content. It can be concluded that ΔTE is not related to carbon activity but to the distribution coefficient of element between cementite and austenite.
