The Introduction of Superalloy
Superalloy or high-performance alloy refers to the high-alloying metal material that can bear complicated stress under the high-temperature condition of over 600℃ and possesses good surface stability. It is mainly applied in the field of engines, including aero-engines, rocket engines and various industrial-used gas turbine engines. Based on the statistics of Roskill, the Superalloy occupies 55% in the aerospace field and 20% in the electric field. All in all, the Superalloy shares a broad prospect.
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Classification Standard |
Name |
Features |
Application |
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Main Elements |
Fe-based Superalloy |
Working at the temperature from 600℃ to 850℃ |
Mainly applied in the low-temperature part of engines, such as aero-engines, industrial gas-fired turbine disks, receivers and some fasteners |
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Ni-based Superalloy |
Working at the temperature from 650℃ to 1000℃ |
Suitable for aero-engines turbine blades, guide vanes, turbine disks, combuster and more |
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Co-based Superalloy |
Working at the temperature from 730℃ to 1100℃; having excellent mechanical behavior and toughness but more expensive due to the rareness of cobalt |
Guide vanes |
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Manufacturing Techniques |
Deformed Superalloy |
Processed with cold or hot deformation; with awesome mechanical behavior and toughness; with good characteristics of resistance to oxidation and corrosion; working at the temperature from －253℃ to 1320℃ |
One is the combuster of aero-engines, guide vanes and more, the other is aero-engines turbine disks and blades and more |
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Cast Superalloy |
Directly produce parts by casting; working at the temperature from 1300℃ to 1500℃ |
Mainly applied in aero-engines, turbine blades, guide vane, turbocharger, turbine receivers, exhaust nozzle control and more |
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Powder Superalloy |
with small crystal grains and evenly organized elements; improve precipitation and performances of hot working, which can transfer the hard-to-deformed casting superalloy into deformed superalloy with powder method to improve its thermoplasticity |
Aero-engine turbine disks, spring-ring and more |
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Reinforcement Methods |
Solid Solution Strengthening Superalloy |
premium performance of resistance to oxidation, plasticity, formability and high-temperature strength |
mainly used for parts with high ambient temperature but low stress, such as combustor and more |
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Precipitation Hardening Superalloy |
Possess high-temperature strength, creep resistance and more |
mainly suitable for parts bearing high loads and medium or high temperature, such as turbine blades, turbine disks, and more |