一种焊接石墨的铜框架活性钎焊的焊接方法及系统
By employing an active brazing method with a copper frame, graphite and a copper frame are welded under vacuum and temperature control using an active element tin-based brazing filler metal. This method solves the problems of high complexity and low strength in graphite welding, achieving a highly efficient and stable connection suitable for heat sinks in power electronic equipment.
CN117182225BActive Publication Date: 2026-07-17HUAZHONG UNIV OF SCI & TECH +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAZHONG UNIV OF SCI & TECH
- Filing Date
- 2023-09-11
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Welding graphite to graphite is complex and results in low mechanical strength, making it difficult to use stably in industrial applications.
Method used
The copper frame active brazing method is adopted, which involves uniformly attaching an extremely thin layer of tin-based brazing filler metal containing active elements to both sides of the copper foil, and brazing under vacuum and controlled temperature, while applying pressure to ensure a tight connection between the copper frame and the graphite.
Benefits of technology
It improves the mechanical strength and joint strength of graphite welding, reduces the welding temperature, and is suitable for heat sinks of power electronic equipment to enhance heat dissipation.
✦ Generated by Eureka AI based on patent content.
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Figure CN117182225B_ABST
Abstract
本发明属于石墨活性钎焊技术领域，尤其涉及一种焊接石墨的铜框架活性钎焊的焊接方法及系统，包括以下步骤：S1，将铜箔经过酸、丙酮、乙醇清洗后，在铜箔两侧均匀附着一层极薄的含有活性元素锡基钎料并迅速烘干；S2，将两侧附着活性元素的铜箔两面贴合石墨，依次将石墨母材、铜箔摆放至所需厚度后固定并放入真空钎焊炉中；S3，抽真空低至10‑3Pa时，开始随炉升温，在200‑350℃时，保温10‑30min后进行排胶，将炉升温至钎焊连接温度900‑1050℃后，保温10‑30min并施加500‑1500kg压力，冷却后即可得到石墨块材。本发明采用铜为钎焊焊料的框架，制备的钎焊石墨可实现较好的钎焊连接，接头无裂纹、气孔等缺陷，具有节省焊料，生产效率高，制备过程简单等优点。
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