Heat treatment of high temperature elastic alloys The elastic alloys used at high temperatures are iron-based and nickel-based.

Iron-based superalloys GHl35, GHl32, etc. are used to make springs. The role of chromium is mainly to form a dense oxide film on the surface of the metal. The role of nickel is to maintain the austenitic structure of the matrix (because austenitic steel has higher heat strength than ferritic steel at high temperatures), And forming an intermetallic compound 7 with strong precipitation strengthening effect with elements such as titanium and aluminum, and phases Ni3 (TiAl) and Ni3 (A1Ti). Tungsten and molybdenum mainly act as solid solution strengthening, and boron acts to purify grain boundaries and improve creep resistance.