cesses,the size of inclusions in the solidified metal film will be smaller than that in the solidified ingot as the solidification rate of the metal film is higher than that of the remelted ingot. The remelting experiment results for the superalloys have proved the expe- ctation.The experimental conditions are as follows: GH220,the consumable electrode of 40mm dia.was melted in a 50kg VIM furnace and casted in a refractory mold.VAR ingot dia.is 65mm.The vari- ation of inclusions during the VAR process of GH220 is shown in Fig-3. GH169,the consumable electrode of 40mm dia.was melted in a 50kg VIM furnace and casted in a refractory material mold.During the VIM process,the pure TiN powder weighing 0.1 wt%of charge was added into the melt.The melt remained in the magnesia crucible at 1550C for 2 min.The consumable electrode contains 140 ppm nitrogen and some nitride clusters.ESR ingot dia. is 100mm,the slag composition is 70%CaF2+30%Al,Oa.The variation of inclusions during the ESR process of GH169 is shown in Fig.4. GH36,the consumable electrode of 40mm dia.was forged from AAM (air arc melting)+ESR forging bar of 90mm square.ESR ingot dia.is 100mm,the slag composition is 70%CaF2+30%Al2 Os. 20m Fig.3 Variation of Inclusions during the VAR process of GH220 (31I220) a-cast clectrode; b-mctal filmy c-wrought remelted metal. b 20细 Fig.4 Variation of Inclusions during the ESR process of GH169(In-718) a-cast electrode (TiN powder added) b-metal film, c-wrought remelted metal; 506， 主 主 主 一 五 ， 一 · 且 主 一 。 ， 一 一 宜 王 。 ， 。 住 ， 。 · ， 扭 、 · 巧 ﹁ 确 位 住 一 ， 业器一 。 · 淤 称 募 咬 气 决 矿补兮 一 厂 一。 尹 美 一 一 ， 泌 黔 榔 农 一 。 豁 一 甄 一 一 、 未笋侧翔一 猫 夔弩 勇 扩巍 矜 噢氛纂 赘 脚一弓 梦 铆 飞 矛 一奋 一 瓜 矿爵中 百 一 犷 扩 万感称 终一粤谁 一 赢 涟咬一月找州减彼资汁汹月份︸雌门斗咚该份汗味套 易 声谬， 城翻节 。 卜 一 ， 一 口 ， 一 一