An anti-oxidation iron-based
superalloy and a preparation method thereof, which belong to superalloys and a preparation method thereof, solve the problem of unsatisfactory
oxidation resistance of existing iron-based superalloys under high-temperature conditions, so as to improve serviceability and broaden high-temperature application fields. The anti-oxidation iron-based
superalloy of the present invention has the composition
mass percentages of: 12%≤Cr≤14%, 2%≤W≤3%, 0.3%≤Ti≤0.4%, 0.2%≤Si≤2%, 0.25%≤ Y2O3≤0.3%, the balance is Fe; it is made by mechanical alloying, molding and
vacuum sintering, and the matrix of the final sintered body is α-(Fe, Cr) single-phase
solid solution with uniformly distributed oxides in the matrix. The invention has high production efficiency and low cost, and the prepared anti-oxidation iron-based
superalloy has reduced oxidation
weight gain and improved anti-oxidation ability under the atmospheric condition of 850°C; the tensile strength at
room temperature is ≥600MPa, and the elongation rate is ≥25%, which meets the requirements of automobiles. Requirements for the use of high-temperature structural parts such as engines and
gas turbines,
nuclear fission fuel cladding tubes, and first wall structural materials of
nuclear fusion reactors.