Preparation method of high-surface-quality high-rrr profiled groove wire for superconducting wire

Abstract

The application belongs to the technical field of superconducting wires, and particularly relates to a preparation method of a high-surface-quality high-RRR profiled groove wire for superconducting wires. The preparation method comprises the following steps: 1) using copper as raw material, preparing a super-long copper wire blank through continuous casting; 2) performing online profiled skinning on the copper wire blank to obtain a profiled groove wire after skinning; 3) performing low-processing-rate shaping die finishing on the profiled groove wire after skinning to obtain a finished profiled groove wire; 4) performing fluid polishing on the finished profiled groove wire to obtain a polished profiled groove wire; and 5) sequentially performing online ultrasonic cleaning, online diameter measurement and eddy current flaw detection on the polished profiled groove wire. The application avoids the problems of RRR reduction, low surface quality and long production cycle existing in the preparation of profiled groove wires through traditional multi-pass cold working, and can stably obtain a high-performance profiled groove wire with a length of greater than or equal to 5000 m, an RRR of greater than or equal to 500 and a surface roughness Ra of less than or equal to 0.3 microns.

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