Feasibility of semisolid forging of cast iron using rapid resistance heating was
experimentally investigated. Gray pig iron FC250 and spheroidal graphite cast iron FCD600, whose
carbon equivalents are both 4.3% in mass, were used for the experiments. Since these cast irons
have a narrow semisolid temperature range, an AC power supply with an input electric energy
control function was used. In this study, the resistance heating characteristics of the cast irons were
firstly examined, and then their semisolid forging experiments were conducted. In the forging
experiments, the conditions of the forgings such as microstructures and hardness properties were
examined, and the feasibility of the semisolid forging of cast iron using resistance heating was
discussed. As a result, it was found that the method presented here is highly feasible.
Thermomechanical Testing of GGG 40 Spheroidal Graphite Cast Iron Alloy
