Fundamentals of desoxidation behaviour of Ti-alloys by chamber ESR with Ca-reactive slags

摘要

The special thermochemical and kinetic characteristics of electroslag remelting (ESR) require an advanced process control in order to apply this process for the desoxidation of titanium alloys. Based on the example of high oxygen containing gamma -Titanium Aluminides, that have been prepared from oxidized scrap or via metallothermic reduction, the application of Ca-reactive slags is modelled using a quasi-equilibrium approach, taking into account the effects of varying slag composition and evaporation. This leads to a detailed design of experiment and parameters for process control in order to receive a chemically homogeneous product with low oxygen content.