Nickel-based superalloys are a class of alloys with nickel as the main component, designed for applications in high temperature, high stress, corrosion or other extreme environments. ‌ This type of alloy usually contains other elements, such as chromium, cobalt, molybdenum, etc., to improve its high temperature resistance and corrosion resistance.
According to the main alloying elements and microstructure in the alloy, nickel-based alloys can generally be classified into solid solution strengthening type and aging strengthening type. According to the different preparation processes, nickel-based alloys can be divided into three categories: deformed nickel-based superalloys, cast nickel-based superalloys and powder metallurgy superalloys.
The main characteristics of nickel-based superalloys include high strength and good oxidation resistance and gas corrosion resistance in the range of 650~1000℃. This type of alloy can be hot and cold deformed, with an operating temperature range from -253℃ to 1320℃, and has good mechanical properties and comprehensive strength and toughness indicators.
Representative materials of nickel-based alloys are:
1. Incoloy alloy, such as Incoloy800, the main components are; 32Ni-21Cr-Ti,Al; it is a heat-resistant alloy;
2. Inconel alloy, such as Inconel600, the main components are; 73Ni-15Cr-Ti,Al; it is a heat-resistant alloy;
3. Hastelloy alloy, such as Hastelloy C-276, the main components are; 56Ni-16Cr-16Mo-4W; it is a corrosion-resistant alloy;
4. Monel alloy, such as Monel 400, the main components are; 65Ni-34Cu; it is a corrosion-resistant alloy;
