High-temperature alloy is a metal material that can work for a long time at above 600℃ and under certain stress conditions. It has excellent high-temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. It has become an irreplaceable key material for the hot end components of military and civilian gas turbine engines.
According to the matrix elements, it can be mainly divided into iron-based high-temperature alloys, nickel-based high-temperature alloys and cobalt-based high-temperature alloys. According to the preparation process, it can be divided into deformed high-temperature alloys, cast high-temperature alloys and powder metallurgy high-temperature alloys. According to the strengthening method, there are solid solution strengthening type, precipitation strengthening type, oxide dispersion strengthening type and fiber strengthening type.
High-temperature alloys are mainly used to manufacture high-temperature components such as turbine blades, guide blades, turbine discs, high-pressure compressor discs and combustion chambers of aviation, ships and industrial gas turbines. They are also used to manufacture energy conversion devices such as spacecraft, rocket engines, nuclear reactors, petrochemical equipment and coal conversion.