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Investigation on drawing process of Bi-2223/Ag wires using racetrack-type dies: Simulation and experiments

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Abstract

The traditional rolling process of Bi-2223/Ag wires with circular sections is an inhomogeneous process. For the purpose of achieving a uniform filaments distribution, a novel technique for round wire through racetrack-type dies during the last several passes of drawing is necessarily brought forward. In order to investigate the processing behaviors of superconducting filaments, a numerical model for the three passes of racetrack drawing was constructed, and subsequently, the optimization of three racetrack-type dies was designed based on the simulation results. Then the three passes of racetrack drawing was applied to fabricate Bi-2223/Ag tape and the density distribution of each filament of the wire was studied by Vickers microhardness. The experimental results showed that the racetrack drawing can obtain dense superconducting filaments, and improve the mechanical properties and critical current of the final tape.

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Authors and Affiliations

  1. Key Laboratory for Advanced Materials Processing Technology, Tsinghua University, Beijing, 100084, China

    YongJin Lu, Pan Zeng, LiPing Lei, TiMing Qu & Gang Fang

  2. Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China

    YongJin Lu, Pan Zeng, LiPing Lei, TiMing Qu & Gang Fang

  3. Innova Superconductor Technology Co.Ltd., Beijing, 100176, China

    JianFeng Sun

Authors
  1. YongJin Lu
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  2. Pan Zeng
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  3. LiPing Lei
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  4. TiMing Qu
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  5. Gang Fang
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  6. JianFeng Sun
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Corresponding author

Correspondence to Pan Zeng.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 50635050)

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Lu, Y., Zeng, P., Lei, L. et al. Investigation on drawing process of Bi-2223/Ag wires using racetrack-type dies: Simulation and experiments. Sci. China Ser. E-Technol. Sci. 52, 2255–2262 (2009). https://doi.org/10.1007/s11431-009-0234-x

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  • DOI: https://doi.org/10.1007/s11431-009-0234-x

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