High temperature alloy refers to a type of metal material based on iron, nickel, and cobalt that can work for a long time at a high temperature above 600 ℃ and a certain stress. It has excellent high temperature strength, good oxidation and thermal corrosion resistance, and good The comprehensive properties of fatigue performance and fracture toughness, also known as 'super alloys,' are mainly used in aerospace and energy fields.

Definition

High temperature alloy refers to a type of metal material based on iron, nickel, and cobalt that can work for a long time at a high temperature above 600°C and a certain stress; and has high high temperature strength, good oxidation and corrosion resistance, Good fatigue performance, fracture toughness and other comprehensive properties. The superalloy is a single austenitic structure, which has good structure stability and service reliability at various temperatures.

Based on the above performance characteristics, and the high degree of alloying of superalloys, it is also called 'superalloys' and is an important material widely used in aviation, aerospace, petroleum, chemical industry, and ships. According to the matrix elements, high-temperature alloys are divided into iron-based, nickel-based, cobalt-based and other high-temperature alloys. The service temperature of iron-based superalloys generally can only reach 750~780℃. For heat-resistant parts used at higher temperatures, nickel-based and refractory metal-based alloys are used. Nickel-based superalloy occupies a particularly important position in the entire field of superalloys. It is widely used to manufacture the hottest parts of aviation jet engines and various industrial gas turbines.