CHANGES OF THE CHROMIUM CONTENT IN LIQUID COPPER DURING VACUUM MELTING OF A CU-CR-NI-SI ALLOY

The kinetics of the chromium dissolution process in liquid copper and in liquid Cu-Ni and Cu-Si alloys during melting in an induction-heated vacuum furnace is described in this article. As the subject of the studies an alloy containing 1.0% Cr, 2.4% Ni and 0.6% So has been taken. The AAS method was used as determination procedure for chromium, nickel and silicon. It has been found that the chromium dissolution kinetics in liquid copper does not undergo any significant changes by a previous addition of silicon or nickel to the melt. However, the maximum amount of chromium entering the smelt decreases.