Explanation

alloy based on nickel. Nickel has y austenite with face-centered cubic structure. No allotropism transformation from room temperature to high temperature: usually 10% -25% chromium is added to nickel base alloy to ensure that alloy has good oxidation resistance and corrosion resistance. The alloy with solution strengthening is called nickel based solution strengthened alloy, which is made of Ta, Nb, Hf, Re, V and other refractory metal elements. In addition, a small amount of C, B, Zr or multiple microalloying elements are added to the nickel base alloy to strengthen the grain boundary. nickel-base superalloy with solid strengthening and Y phase or/and phase strengthening is a nickel base precipitation strengthened alloy. alloy with less element content in nickel base alloy and which can be deformed into profiles and parts blanks through hot working belongs to nickel base deformed alloy. alloy with more element content in alloy cannot be deformed by hot working. The alloy that can only be casting by remelting the parent alloy or directional solidification into parts or parts blanks is nickel base foundry alloy. Nickel base alloy is not easy to form TCP phase due to its good mechanical properties at high temperature and high organizational stability. It is widely used to make turbine blades and other parts used at high temperatures above 8001C.

Classification