Introducing Carbon Nanoparticles in Titanium During Chamber Electroslag Remelting (Chesr)

The possibility of introducing carbon nanoparticles in titanium during ChESR is currently under investigation at DonNTU. Theoretical evaluation of phase and structure formation during crystallization was fulfilled by using the binary phase diagram of titanium and carbon. Within the investigations, consumable electrodes with previously introduced dispersed carbon particles were prepared by pressing of titanium sponge and nanoparticles of different types. The subsequent remelting was performed under a protective gas atmosphere in a 724 kW ChESR furnace. The average carbon content after remelting was in the range of 0.03 – 0.34 wt.-%. An increased carbon content simultaneously resulted in an increase of hardness from 140 to 220 HB. Metallographic investigations of precipitations in metal have shown phases mainly consisting of titanium-carbide particles with nonstoichiometric composition. As a result it could be stated, that structure as well as hardness show that ChESR provides good chemical and structural homogeneity of titanium ingots.