Effect of ESR remelting parameters on pool depth

The relation between pool depth h(0,Y) and processing parameters of electroslag remelting under the automatic feeding system of consumable electrode was investigated.This relation can be expressed by h(0,Y)=A·e-B/Y,where A,B are functions of remelting parameters,Y is the height of ingot.By this formula,with remelting parameters known,h(0,Y) can be estimated at any Y.Two remelting regimes were compared:(1)the remelting current was reduced at regular intervals;(2)the remelting current was constant.The results showed that h(0,Y) was small and its change was less with the increase of Y under regime 1.These effects facilitate the formation of homogeneous cast structure.If the interval and current level are chosen properly,it is possible to get a pool with quasi-equal depth when Y exceeds a certain extent.