Vacuum induction melting method for reducing nitrogen content in high temperature alloy

The invention discloses a vacuum induction melting method for reducing the nitrogen content in high temperature alloy and belongs to the technical field of high temperature alloy smelting. Niobium which belongs to high nitride-forming elements is added at the later stage of material melting instead of adding along with a furnace and added after N in alloy melt is mostly removed, so that forming of a core with hard-to-decompose nitride inclusion is reduced, and Al, Ti and the like which are prone to be damaged after being burnt and the elements with high affinity to N are added at the later stage of refining. The vacuum induction melting method for reducing the nitrogen content in the high temperature alloy has the advantages that the adding sequence of raw materials is merely required to be adjusted, the operation is simple, the method is easy to implement, and the metallurgical quality of the high temperature alloy in actual industrial production can be remarkably improved.