Introduction To High Temperature Alloys

High-temperature alloys refer to a type of metal materials based on iron, nickel, and cobalt that can work for a long time under high temperatures above 600°C and certain stress; and have high high-temperature strength, good anti-oxidation and anti-corrosion properties, Good fatigue performance, fracture toughness and other comprehensive properties. High-temperature alloys have a single austenite structure and have 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, they are also called "superalloys" and are 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 high-temperature alloys can generally only reach 750~780°C. For heat-resistant parts 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 field of high-temperature alloys. They are widely used to manufacture the hottest components of aviation jet engines and various industrial gas turbines.