| 摘要 |
PURPOSE:To obtain a heat exchanger excellent in a corrosion resistance by applying an Al-Si alloy brazing filler having a limited diameter with the use of a binder for the joining of the fin and pipe of the heat exchanger and an Al alloy header incorporating more than one of Cu and Mn of a limited wt. ratio and executing the heat brazing. CONSTITUTION:By using the Al alloy material incorporating Cu and Mn for header 2, Cu and Mn allow Al and Al alloy to be noble electrochemically and the corrosion to the brazed header 2 to be prevented. The Al alloy incorporating more than one of 0.05-0.7w% Cu and 0.1-1.2wt.% Mn is therefore used. An Al-Si alloy brazing filler having 10-200mum diameter is applied with the use of a binder for the joining of a fin 3 and a pipe 1 and the header 2, heated and brazed. |
