Features of ellinvar alloys deoxidation
An ingenious method for calculating the thermodynamic models for liquid metal solutions of multicomponent systems based on iron and nickel, as well as ellinvar alloy is proposed. Calculation of activity and the oxygen content in ellinvar alloy and deoxidation power of aluminum, cerium and lanthanum is determined using equations and models of regular and pseudoregular solutions. When melting the base model ellinvar alloy the content of oxygen and nitrogen is determined by the gas analysis methods. Oxygen activity is investigated by the EMF method (а <sub>O)</sub>, the morphology and composition of non-metallic inclusions are studied by metalography and SEM and the benefits of Al, Ti introduction into the melt to reduce the а <sub>O</sub> and nonmetallic inclusions, comprising predominantly Ti and O <sub>2</sub>, N and S with the size 5-10 microns is shown.