The Brazing of Copper Pipe and Aluminum Pipe Based on the 4R

The copper-aluminum pipe has been widely used in the refrigeration industry. With the increases of the scrap rate in electronic products, the recycle and remanufacturing of Cu-Al brazed joints becomes the focus. In this study, introduced the green welding, which will improve the recycle ability of the Cu-Al brazed joints from technological design source. The experiment results shows that it is possible to improve the remanufacturing and the mechanical properties of Cu-Al brazed joints with the appropriate lap length,and it complies with the green welding design concept when the lap length of Cu-Al brazed joints is 5 mm.