一种聚变堆超导线圈盒用特厚奥氏体不锈钢板、制造及其焊接方法

By employing specific chemical compositions and processing techniques, the stability and welding issues of extra-thick austenitic stainless steel plates used in fusion reactor superconducting coil boxes under extreme conditions were resolved, achieving high strength and good welding performance, thus ensuring the stable operation of the superconducting magnet.

CN121759813BActive Publication Date: 2026-07-17ANGANG STEEL CO LTD
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Patent Information

Application Number
CN202610246157.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-02
Publication Date
2026-07-17
Estimated Expiration
2046-03-02

AI Technical Summary

Technical Problem

Existing technologies make it difficult to provide an extra-thick austenitic stainless steel plate for fusion reactor superconducting coil boxes that can operate stably under extreme conditions. Furthermore, the welding process is prone to arc blow and magnetic field distribution issues, which affect the stability of the superconducting magnet.

Method used

By designing the chemical composition of medium carbon, manganese nitrogen vanadium, and aluminum hafnium alloys, combined with the design of nitrogen inlet and nozzle in the vacuum induction furnace, and employing cumulative rolling, post-rolling homogenization treatment, water cooling and stabilization heat treatment, electromagnetic induction demagnetization method, and hot-press diffusion welding method, the high strength, corrosion resistance and welding quality of the material are ensured.

Benefits of technology

The produced steel plates have high strength, good low-temperature mechanical properties and weldability under extreme conditions, avoiding the influence of electromagnetic force on the magnetic field and ensuring the stable operation of the superconducting coil box.

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Abstract

本发明提出一种聚变堆超导线圈盒用特厚奥氏体不锈钢板、制造及其焊接方法，钢板的成分按重量百分比计如下：C：0.04%~0.05%、Si：0.20%~0.30%、Mn：10.0%~11.0%、P≤0.015%、S≤0.002%、Cr：21.5%~22.5%、Ni：15.5%~16.5%、Mo：5.0%~6.0%、N：0.45%~0.55%，V：0.15%~0.25%，Nb：0.10%~0.15%，B：0.0015%~0.0025%，Al：1.5%‑2.5%，Hf：0.05%‑0.10%，其余含量为Fe和不可避免的杂质。钢板的生产方法包括冶炼、加热、轧制、热处理、退磁处理。所述焊接方法采用热压扩散焊，热压炉通过液压油缸对焊件从两侧施加压力，压力值40~50Mpa。
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Citation Information

Patent Citations

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  • A method for reducing chain carbides in high-performance heat-resistant stainless steel materials

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  • Austenitic stainless steel and manufacturing method therefor

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  • Method for manufacturing a steel strip or sheet consisting mainly of MN-austenite

    CN1659300A