ESTIMATES OF DROPWISE TRANSFER PARAMETERS IN ELECTROSLAG REMELTING OFNICKEL AND CHROMIUM BRONZE AND A METHOD OF CALCULATING THESE PARAMETERS FOR FERROUS AND NONFERROUS METALS

Experimental data are used for determining the parameters of a film of liquid metal and drop at the electrode up in electroslag remelting of nickel and chromium bronze. In these cases film thickness was 0.8-1.2 and 1.6-1.8 mm. respectively, film overheating above liquidus 8-18 an d 3-4 degrees C: drop diameter 4.0-4.5 and 3.9-4.1 mm; time of drop tr avel in slag 0.2-0.3 s: total overheating of drop 60-70 and 45-50 degr ees C. The possibility is shown of obtaining estimates of dropwise tra nsfer characteristics on the basis of thermal and physical properties of the remelted metal without using the properties of slags. Multipurp ose, empirical formulas are given suitable ibr calculating the film an d drop parameters under optimum conditions of electroslag remelting.