Method for improving obdurability of refractory high-entropy alloy by doping rare earth Ce

The invention discloses a method for improving the obdurability of a refractory high-entropy alloy by doping rare earth Ce. The method comprises the following steps: S1, burdening: weighing pure metal raw materials of Nb, Ti, Zr and V and a pure rare earth raw material of Ce according to the composition proportion; the content of Ce is 0 to 0.01 at% according to the atomic percent; and S2, smelting is conducted, specifically, the weighed raw materials are put into a smelting furnace to be smelted, and the refractory high-entropy alloy cast ingot with uniform components is obtained. According to the method for improving the obdurability of the refractory high-entropy alloy by doping the rare earth Ce, the rare earth Ce has a remarkable grain refinement effect, a second phase beneficial to plastic deformation is separated out at the grain boundary, the problem that the Nb0. 5TiZrV0. 5 refractory high-entropy alloy is poor in room-temperature plasticity can be solved, and good matching of room-temperature tensil