High-temperature alloy
High temperature alloys refer to a type of metal material based on iron, nickel, and cobalt that 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 service reliability 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 naval vessels. According to the matrix elements, high-temperature alloys are further divided into iron based, nickel based, cobalt based and other high-temperature alloys. Iron based high-temperature alloys can generally only be used at temperatures ranging from 750 to 780 ℃. For heat-resistant components used at higher temperatures, nickel based and refractory metal based alloys are used. Nickel based high-temperature alloys play a particularly important role in the entire high-temperature alloy field, as they are widely used to manufacture the hottest end components of aviation jet engines and various industrial gas turbines.
