Bent crack-free nickel-based superalloy as well as preparation method and application thereof

The invention belongs to the technical field of high-temperature alloys, and particularly relates to a bending crack-free nickel-based high-temperature alloy and a preparation method and application thereof. The bending crack-free nickel-based high-temperature alloy provided by the invention comprises the following components in percentage by mass: 0.04 to 0.09 percent of C, 19.00 to 23.00 percent of Cr, 9.00 to 14.00 percent of Co, 7.00 to 9.00 percent of Mo, 1.20 to 1.70 percent of Al, 1.6 to 2.1 percent of Ti, 0.01 to 0.6 percent of Nb, 0.01 to 5 percent of W, 0 to 0.05 percent of Zr, 0.01 to 0.1 percent of Nd, 0.001 to 0.01 percent of B and the balance of nickel and inevitable impurities, and the mass percent of Mo and the mass percent of Nd meet the relational expression that Mo is more than 6.5 percent and less than 7.8 percent and Nd is less than 8.3 percent. The alloy has relatively high room-temperature tensile strength and relatively good creep resistance, does not form cracks after being bent, and