Preparation method of MgB2 multi-core superconducting wire

The invention belongs to the technical field of superconducting wire preparation, and particularly relates to a preparation method of an MgB2 multi-core superconducting wire. The preparation method comprises the steps of filling powder into a mold, pressing into a rod-shaped blank, and then filling into a metal tube for subsequent processing to obtain the MgB2 multi-core superconducting wire with deformed core wires and uniform superconducting performance of the finished wire. The defect of non-uniform performance of wires prepared by manual powder filling is overcome. According to the multi-core MgB2 superconducting wire prepared by the preparation method provided by the invention, nine samples are taken from the head, the middle and the tail of the multi-core MgB2 superconducting wire, a group of critical current data under 4T is obtained by testing, and compared with data obtained by a wire prepared by manual powder filling, the standard deviation is reduced, and the uniformity of the wire is obviously imp