High temperature alloy refers to as the base, iron, nickel and cobalt in the high temperature of 600 ℃ above and must stress under the action of the long-term work of the kind of metal material, has excellent high temperature strength, good resistance to oxidation and thermal corrosion resistance, good fatigue properties, fracture toughness and other comprehensive performance, also known as "super alloy, mainly used in aerospace field and energy field.