Research on Processing Technique of Superconducting Niobium Sheet

This article researched on processing technique of RRR300 superconducting niobium sheet, designing three process schemes including forging, rolling and heat treatment. In conditions of 900℃/60 min and 950℃/60 min heat treatment, we test the RRR300 superconducting niobium shee's RRR300 value, microstructure and mechanical property. Scheme 2 nd is confirmed optimum process at last. It can manufacture RRR300 value > 300, hardness ≤ 50 HV, tensile strength 140~175 MPa, yield strength 50~75 MPa, elongation ≥ 50% and G=5. 5~6. 0 RRR300 superconducting niobium shee. It can be applied to industrial production.