METHOD FOR SMELTING AND CASTING REFRACTORY METALS AND ALLOYS THEREOF COMBINING COLD CRUCIBLE INDUCTION SMELTING TECHNOLOGY AND ENERGY BEAM TECHNOLOGY

摘要

A method for smelting and casting refractory metals and alloys thereof combining a cold crucible (5) induction smelting technology and an energy beam technology. The method comprises the following steps: 1) smelting, an induction coil produces an electromagnetic field (B), an energy beam emitting head (11) emits an energy beam (N), the energy beam N enables the local furnace charge in the cold crucible (5) to reach a high temperature and melt, so as to form a local molten pool, the electromagnetic field (B) heats the entirety of the furnace charge and enables the local molten pool to enlarge and obtain electromagnetic stirring, until all the metal furnace charges form an integral molten pool with homogeneous ingredients; 2) tilt-casting, at the end of the smelting, the emission of the energy beam (N) is stopped, the induction coil keeps working to maintain the electromagnetic field (B), the electromagnetic field (B) keeps heating the molten pool, a thermal baffle is moved at the same time, and the cold crucible (11) is tilted and the refractory metal is cast into a casting mould (21). With regards to the refractory metal and alloy, this method can prepare a uniform and compact material having accurate ingredients.