Superalloys are divided into three types of materials: 760 ° C high temperature materials, 1200 ° C high

temperature materials and 1500 ° C high temperature materials, tensile strength 800MPa. Or it refers to

high-temperature metal materials that work for a long time under 760--1500 °C and certain stress conditions,

with excellent high temperature strength, good resistance to oxidation and hot corrosion, good fatigue properties,

fracture toughness and other comprehensive properties. It has become an irreplaceable key material for military

and marine gas turbine engine hot end components.

According to the existing theory, 760 ° C high temperature materials can be mainly divided into iron-based

superalloys, nickel-based superalloys and cobalt-based superalloys according to matrix elements. According

to the preparation process, it can be divided into a deformed superalloy, a cast superalloy and a powder metallurgy

superalloy. According to the strengthening method, there are solid solution strengthening type, precipitation

strengthening type, oxide dispersion strengthening type, and fiber strengthening type. Superalloys are mainly

used to manufacture high temperature components such as turbine blades, guide vanes, turbine disks, high

pressure compressor disks and combustion chambers for aerospace, naval and industrial gas turbines, as well

as for aerospace vehicles, rocket engines, nuclear reactors, petrochemical plants, and Energy conversion

devices such as coal conversion.