Double-alloy turbine blisk and method for improving bearing capacity of connecting interface

The invention relates to the field of aero-engine equipment, in particular to a double-alloy turbine blisk and a method for improving the bearing capacity of a connecting interface of the double-alloy turbine blisk. The double-alloy turbine blisk comprises a wheel disc and a plurality of blades. A connecting interface is arranged on the circumferential side wall of the wheel disc, and the section shape of the connecting interface is at least one continuous regular curve section; the section shape of the connecting ends of the blades is matched with the section shape of the connecting interface, the connecting ends of the blades are fixedly arranged on the connecting interface, and the multiple blades are arranged in the circumferential direction of the wheel disc at equal intervals. According to the double-alloy turbine blisk, the connecting interface with the section in the shape of at least one continuous regular curve section is arranged on the wheel disc, so that the tensile stress borne by the connecting