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Nickel-based alloys are a class of alloys based with nickel with the matrix and comprehensive properties such as high strength and certain oxidation and corrosion resistance at high temperatures of 650 to 1000 °C.The main element in nickel-based alloys is nickel, which is also a matrix element, and nickel has a face-centered cubic structure (FCC).It can maintain its original structure without allotropic transformation during the transformation from room temperature to high temperature, and it can also maintain the stability of the y austenite phase in the case of dissolving more alloying elements. Nickel has excellent corrosion resistance. In addition, other alloying elements such as chromium, molybdenum, and titanium in the alloy further improves the performance of nickel-based alloys. Nickel-based alloys have great physical and chemical properties, wear resistance, corrosion resistance, etc. These excellent comprehensive properties make it widely used in aerospace, petrochemical and other fields. At present, according to the main properties, it can be divided into nickel-based heat-resistant alloys, nickel-based corrosion-resistant alloys, nickel-based wear-resistant alloys, nickel-based precision alloys and nickel-based shape memory alloys.