一、前言由于真空冶炼铸造设备具有减少金属在冶炼、浇注过程的氧化及易于控制金属液温度等优点,在生产钴基、镍基及铁基高温合金零件和其他高精度零件方面已获得日益广泛的应用。目前,国外正向高功率、半连续及连续真空冶炼铸造炉方向发展。在试制45GP80系列增压器整体铸造涡轮的过程中,由于涡轮盘与叶片截面厚度相差 I. Introduction Since the vacuum smelting casting equipment has the advantages of reducing the metal smelting, pouring process of oxidation and easy to control the temperature of the molten metal, etc., has been widely used in the production of cobalt-based, nickel-based and iron-based superalloy parts and other high-precision parts Applications. At present, foreign countries are developing toward high-power, semi-continuous and continuous vacuum smelting furnaces. In the trial of 45GP80 series turbocharger casting the whole process of the turbine, the turbine disc and blade cross-section thickness difference