HOT LINE: +86-510-80628100HOT LINE: +86-510-80628100High-temperature alloys can be classified according to the following classification methods:
1: Classification according to the main elements of alloys
The main constituent elements of high-temperature alloys include iron (Fe), nickel (Ni), cobalt (Co), titanium (Ti), aluminum (Al), chromium (Cr), molybdenum (Mo), tungsten (W), etc. Among them, the most common are iron-based, nickel based, and cobalt based.
Iron based high-temperature alloy: a high-temperature alloy used under moderate temperature conditions (600-800 ℃). Iron based alloys have simple composition, low cost, and wide application.
Nickel based high-temperature alloy: a high-temperature alloy based on nickel and used under medium to high temperature (650-1000 ℃) conditions. Among all high-temperature alloys, nickel based high-temperature alloys have the highest high-temperature strength and the widest range of applications. Compared to iron-based alloys, it has a more stable structure, fewer harmful phases, and stronger oxidation and corrosion resistance.
Cobalt based high-temperature alloy: an austenitic high-temperature alloy used under high temperature (730-1100 ℃) conditions, with a cobalt content of 40% -65%. High temperature resistance is strong, but cobalt is a precious metal with relatively high cost, which limits the promotion of cobalt based alloys.
2: Classified by manufacturing molding process
It can be mainly divided into three categories: deformed high-temperature alloys, cast high-temperature alloys, and powder metallurgy high-temperature alloys.
Deformation high-temperature alloy: refers to a type of alloy that can undergo hot and cold deformation processing, with a working temperature range of -253~1320 ℃, good mechanical properties, comprehensive strength and toughness indicators, and high corrosion resistance.
Casting high-temperature alloys: high-temperature alloy materials used to directly prepare components by casting methods. According to the composition of the alloy matrix, it can be divided into three types: iron-based cast high-temperature alloys, nickel based cast high-temperature alloys, and cobalt based cast high-temperature alloys. According to the crystallization method, it can be divided into four types: polycrystalline casting high-temperature alloys, directional solidification casting high-temperature alloys, directional eutectic casting high-temperature alloys, and single crystal casting high-temperature alloys.
Powder metallurgy high-temperature alloy: a high-temperature alloy produced by powder metallurgy process. Compared with traditional casting and forging high-temperature alloys, it has the advantages of uniform structure, no macroscopic segregation, high yield strength, and good fatigue resistance.
3: Classify by reinforcement method
It mainly includes four categories: solid solution strengthening, aging strengthening, oxide dispersion strengthening, and fiber strengthening.
