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Vacuum Aluminum Brazing 101 - Printable Version +- AdminClub - Free Web Discussion Forum (https://adminclub.org) +-- Forum: Webhosting Main Forums (https://adminclub.org/forumdisplay.php?fid=1) +--- Forum: Industry Announcements (https://adminclub.org/forumdisplay.php?fid=2) +--- Thread: Vacuum Aluminum Brazing 101 (/showthread.php?tid=40284) |
Vacuum Aluminum Brazing 101 - pysong - 05-11-2024 Vacuum Aluminum Brazing 101 Vacuum aluminum brazing is a specialized process used to join aluminum components. Unlike traditional torch brazing or dip brazing, vacuum brazing takes place in a clean, controlled environment without the use of flux. Let’s dive into the details:Get more news about Vacuum Brazing Aluminum,you can vist our website! Key Aspects of Vacuum Aluminum Brazing: Components and Materials: The most common types of aluminum used for vacuum brazing are Al-6061, Al-1100, and 3000 series Al. Components must be properly prepared for excellent capillary action (wetting). Milled or turned surfaces with a 32 to 64 micro-inch surface finish work best. Surface Preparation: The mating surfaces to be brazed must be flat and less than 0.003 inches thick. Jitterbugging with aluminum-oxide paper is not recommended; silicon carbide is preferred. Avoid using lapping compounds on surfaces to be brazed. Excess Material for Final Machining: Components should have at least 0.050 inches of excess material to be final machined after brazing. The brazed assembly will be annealed and heat-treated to a T6 before final machining. Oxide Removal: Aluminum forms an oxide layer in the air at room temperature. To achieve a high-quality braze joint, this oxide layer must be completely removed to allow bonding to the native metal surfaces. If you’re consigning aluminum components to a brazing service, ensure they are chemically etched and vacuum-sealed or sealed in a suitable plastic bag with an inert gas prior to shipment. Temperature Measurement: Place a 0.075-inch diameter thermocouple hole on one of the outer vertical surfaces to accurately measure the assembly’s temperature during brazing. Full Turnkey Solutions: Consider inquiring about full turnkey solutions that handle the entire brazing process from design to testing, reducing overall risk. |