The main components of Inconel are nickel, chromium and molybdenum. Inconel alloy is an excellent anti-oxidation and corrosion material with good oxidation and corrosion resistance. It has a long service life. Products made of this material have a long service life and are beautiful. Because Inconel alloy is a material with excellent corrosion resistance, it is very suitable for application in extreme environments that need to withstand huge pressure and high heat. When Inconel alloy is heated, a thick and stable passivation oxide layer will be formed to protect its surface from further erosion. Under the protection of this oxide film, the oxidation resistance of Inconel alloy is greatly improved. In addition, because the oxide film of Inconel is formed at high temperature, its corrosion resistance has also been greatly improved. When this layer of oxide film is destroyed, Inconel will return to its original state and show the properties of metal. This layer of oxide film makes Inconel have good thermal stability and oxidation resistance. It can be oxidized directly in the air. It does not need to take other special protective measures to maintain its original good performance.
Historical origin and relevant characteristics
Inconel was first born before December 1932. At that time, Japanese scientists discovered a high-temperature nickel-based alloy with excellent corrosion resistance. Japanese engineers named it "Inconel", which is the first letter of Inconel, meaning "there is a metal". Its trademark is registered by International Nickel Corporation in Delaware and New York.
When the temperature reaches 250 ℃ and above 300 ℃, Inconel alloy has very high mechanical strength, so Inconel is usually used as the hot end part of aeroengine, such as turbine disk. Under thermal load, the strength of Inconel alloy increases with the increase of temperature. Under 250 ℃, Inconel alloy can withstand 20 ℃ lower than the maximum temperature. Inconel alloy has an oxidation resistance of 20 ℃ lower than the maximum service temperature when used at 250 ℃. Under 150 ℃, Inconel alloy has a corrosion resistance of 20 ℃ lower than the maximum temperature. This is because Inconel alloy contains a certain amount of carbides and borides. Inconel alloy shows good thermal shock resistance when burning in air. Inconel alloy has high oxidation resistance at high temperature, but low oxidation resistance at high temperature.
Inconel alloys are widely used in metallurgy, petrochemical, energy transportation, aerospace and other fields.
Inconel alloy is mainly used to manufacture large reactors, heat exchangers, superheaters and reheaters in petrochemical equipment. Inconel alloy has been widely used in the manufacture of large reactors in petrochemical plants (such as synthetic towers in natural gas purification plants, strippers and cracking reactors in oil refineries and refineries, etc.), high temperature and high pressure pipelines (such as high pressure heat exchangers in atmospheric superheater systems), and as parts and components that can withstand ultra-high pressure media and high gas velocity flow in high temperature environments.
Inconel alloy has high specific strength, high specific stiffness, corrosion resistance and other characteristics. In the aerospace field, Inconel alloy is mainly used in the manufacture of rocket boosters, spacecraft segments and aerospace electronic equipment. Inconel alloy exists in the form of nickel-based solid solution. Nickel in Inconel alloy is the smallest element on the periodic table, so it is more stable than carbon. Inconel is usually used in rocket boosters and spacecraft segments in the aerospace field. The studs made of Inconel can well fix the solid rocket booster on the launch platform, and only 8 studs can support the full weight of the space shuttle system ready for flight. In addition, Inco nickel-based solid solution is usually used in the combustion chamber of aerospace engines. Inconel based solid solution has excellent thermal conductivity and can also be used in aerospace electronic equipment manufacturing.