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High temperature alloy refers to a type of metal material based on iron, nickel, and cobalt, which can work for a long time at high temperatures above 600 ℃ and under certain stress conditions; And it has high high-temperature strength, good oxidation and corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. High temperature alloys have a single austenitic structure, which exhibits good structural stability and reliability in use at various temperatures. Based on the above performance characteristics and the high degree of alloying of high-temperature alloys, also known as \"superalloys\", it is an important material widely used in aviation, aerospace, petroleum, chemical, and shipbuilding. According to the matrix elements, high-temperature alloys are further divided into iron-based, nickel based, cobalt based and other high-temperature alloys. The operating temperature of iron-based high-temperature alloys can generally only reach 750~780 ℃. For heat-resistant components used at higher temperatures, nickel based and refractory metal based alloys are used. Nickel based high-temperature alloys occupy a particularly important position in the entire high-temperature alloy field, and are widely used to manufacture the hottest end components of aviation jet engines and various industrial gas turbines.