Effect of Chromium and Nickel on the Viscosity of Molten Iron

Viscosities of molten Fe-Cr and Fe-Ni binary melts have been measured up to 1600℃ by using the oscillating viscometer developed for precise measurement. Viscosities obtained for all the compositions showed very good Arrhenian temperature dependence. Isothermal viscosity of Fe-Cr melt increases monotonously with increasing Cr content, and that of Fe-Ni alloy decreases monotonously with increasing Ni content. Activation energy for viscous flow of the binary alloy also increases and decreases monotonously with increasing the content of chromium and nickel, respectively. The order of the viscosity value of the elements is same to that of the melting point that reflects the cohesive energy in the melt and affects the viscosity of the alloy.