调整工艺参数对ESR熔池深度影响的研究

Effect of ESR remelting parameters on pool depth

研究了自耗电极自动进给系统下的电渣重熔 (Electroslagremelting简称ESR)工艺参数与熔池深度h( 0 ,Y)的关系 ,它可用h( 0 ,Y) =A·e-B/Y数学式表示 ,其中A ,B为工艺参数的函数。利用这一数学表达式 ,如果工艺参数变量为已知 ,则可求出任意锭高Y的h( 0 ,Y) 。比较了调整功率与等电流重熔二种工艺 ,结果表明 ,前者得到的h( 0 ,Y) 有明显的降低 ,且随锭高Y的增加 ,h( 0 ,Y) 变化亦小 ,有利于得到均匀的铸态组织。假若调整幅度选择得当 ,在锭高Y大于某一值时 。

The relation between pool depth h（0, Y） and processing parameters of electrodag 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.