Solidification Pattern of Si-Alloyed, Inoculated Ductile Cast Irons, Evaluated by Thermal Analysis

The solidification cooling curve itself as well its first derivative, and related temperatures, reported to the calculated equilibrium temperatures in stable metastable systems, are used predict characteristics of cast iron. Silicon, most representative iron element, inoculation, graphitizing metallurgical treatment, have a major influence on transition from liquid solid state. Six experimental programs performed, with Si content typically for non-alloyed (<3.0% Si), low (3.0–3.5% Si) medium alloyed (4.5–5.5% ductile irons, Si-content increasing, inoculation simultaneous effects. Silicon is an important influencing factor, but base minor elements also affect eutectic much more Fe-C-Si-Xi system (15–20 °C) than (5–10 °C), comparing their calculation based only effect (Fe-C-Si system). highest positive visible non-Si irons (2.5% Si): 9–15 °C reaction 3 4 times increased at end (37–47 °C). Increased decreases power 7–9 alloying grade (up 3.5% lowest contribution 4.5% (0.3–2.0 2.5–3.5% sensitive high undercooling, especially (but higher efficiency inoculation), compared 4.5–5.5% lower undercooling level, contribution, well.