An important foundation for high performance, long life and high reliability of aviation products
In the manufacture of aircraft, although the proportion of steel is declining, due to the high strength, high toughness, high stress corrosion cracking resistance and good impact resistance of steel, some key bearing structures of aircraft continue to use high-strength stainless steel , It is an important foundation for aviation products to achieve high performance, long life and high reliability.
Material introduction
High-strength stainless steel usually refers to stainless steel with a tensile strength higher than 800MPa and a yield strength higher than 500MPa. Different from conventional stainless steel, high-strength stainless steel has special properties such as high strength, excellent corrosion resistance and fatigue resistance.
As the aircraft develops towards long life and high reliability, the requirements for material corrosion resistance will inevitably be higher and higher. Based on the excellent characteristics of high-strength stainless steel, although its proportion in aircraft manufacturing is on the decline, The use of high-strength stainless steel to make certain important parts has become the main development trend of aviation materials, especially the key load-bearing structural materials such as aircraft landing gear, girders, and high-stress joints.
Application field
Aircraft landing gear, beams, high stress joints, high stress fasteners, aircraft bearings, automobile engine covers, bumpers, body beams, door outer panels…
China's high-strength stainless steel development goals
For the ultra-high-strength stainless steel for special equipment, it is necessary to develop a yield strength of 1400-2200MPa, and the company has a series of high-stress Faust high-strength stainless steel products to meet the needs of aviation, deep-sea drilling, oilfield chemicals, special ships and other industries.