Multi-layered brazing sheet material made of aluminum alloy for flux-free brazing
Patent Information
- Application Number
- DE602021023576
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-06-16
- Filing Date
- 2021-06-15
- Publication Date
- 2024-12-18
- Estimated Expiration
- 2041-06-15
AI Technical Summary
Conventional brazing processes for aluminum alloys often require flux, which can lead to oxidation and edge cracking issues, and existing flux-free methods may not be compatible with all brazing equipment, limiting the versatility and efficiency of the process.
An aluminum alloy multi-layered brazing sheet product with a 3xxx alloy core layer and a thin Al-Si brazing clad layer, where the covering clad layer has a higher Si content than the Al-Si brazing clad layer, allowing for brazing in an inert gas atmosphere without flux, ensuring the Al-Si alloy melts while the covering clad layer remains partially solid to prevent oxidation and facilitate a strong joint.
This approach enables efficient flux-free brazing with improved oxidation protection and joint formation, compatible with existing equipment, enhancing the versatility and reliability of the brazing process for applications like heat exchangers.