INVESTIGATION ON CAST IRON HAVING REFINED GRAPHITE PRODUCED BY MELTING CAST IRON COVERED WITH SLAG CONTAINING TiO₂ (VII)

Thermodynamic Study on the Ti Contained in S-H Cast Iron

Abstract

A thermodynamic study was carried out on the equilibrium of the reactions C+Ti=TiC (s) and Ti+N=TiN (s) in a cast iron melt containing 4% C, 0.25% Ti, 0.03% S, 0.008% N, and 0.002% O under some assumptions. The formation temperatures of TiO₂ (s), TiO (s) and TiS (s) in the same melt were also determined by calculation. Ti in the form of TiC (s) was found to be about 80% of the total Ti content at 1400-1450°C. Though the result was not accurate, the behaviour of Ti in the melt during its slow cooling from about 1800°C could be apploximately estimated.