【摘要】 对大体积液态铜在真空熔炼条件下用熔融钠钙玻璃净化后的过冷度进行了实验研究．结果表明：铜的过冷度受真空度、过热度、净化时间及循环次数的影响．在保证金属液不飞溅和溢出的条件下，增加真空度可提高铜的过冷度；铜的过冷度先随过热度增加而增加，当过热度增加到一定值后，又随过热度的增加而减小；增加净化时间，铜的过冷度先是明显增加，随后逐渐趋于稳定；铜的过冷度在前几个循环中随循环次数增加而增大，在第３～６个循环中达到最大，此后基本上趋于稳定．更多还原

【Abstract】 The undercooling of bulk copper melt denucleated by melted glass in vacuum furnace has been investigated. It is found that the vacuum, cycle number, superheating temperature and denucleating time can put effect on the undercooling of melt; the undercooling of copper melt will increase with the increase of vacuum as long as keeping the copper melt not splash and overflow; the undercooling of copper melt will increase with increasing the superheating of melt at first, as the superheating exceeds a limitation, undercooling will decreased; with the increasing of denucleating time, the denucleating effect will increase apparently at initial stages, henceforth undercooling keeps almost unchanged; the undercooling of copper will increase with the increase of cycle number, and increase to maximum at the third to sixth cycle, henceforth tend to a constant state.更多还原