High-performance heat resistant steel, and preparation method and application thereof

The invention discloses high-performance heat resistant steel, and belongs to the technical field of high-temperature alloy materials. The high-performance heat resistant steel is composed of, by weight percentage, 0.03-0.05% of C, 14.0-16.0% of Cr, 0.60-1.00% of Mo, 6.20-6.80% of Ni, 1.35-1.75% of Cu, 0.30-0.80% of Mn, 0.24-0.75% of Nb, 0.20-0.50% of Si, and the balance Fe. The invention further discloses a preparation method and application of the high-performance heat resistant steel. The high-performance heat resistant steel has excellent high temperature resistance and mechanical properties. According to the mechanical properties at the room temperature of 25 DEG C, the tensile strength Rm at the room temperature tensile test is greater than or equal to 1245 Mpa, the yield strength RP0.2 is greater than or equal to 1030 N/mm , the elongation A is greater than or equal to 13.5%, the percentage reduction of area Z is greater than or equal to 58%, the impact energy AKv is greater than or equal to 94 J, and the hardness HB is greater than or equal to 393.