لحيم كاري سخت ورق هاي آلومينيومي دو لايه 3003/4043 به آلومينيوم 3003

Brazing of 3003/4043 Aluminum Clad Sheets to 3003 Aluminum Alloy

Lap joint poly composites of base-clad AA3003/AA4043 alloys have been prepared in various conditions after vacuum furnace brazing at a pressure setting of 5x10-5 mbar. Shear strength of brazements were measured under tensile loading. The results show that the bond strength decreases by increasing the length of lap joint. The maximum peeling strength was obtained at a critical length (2mm) of overlap using a clad thickness of 50-100 µm. Sagging resistance of brazing sheets was independent of reduction in area due to low Si content of braze material. Fracture surfaces of the samples show two different ductile and brittle regions. Due to results of the energy dispersive X-ray analyses (EDX), brittle fracture regions have more Si content than the ductile fracture regions.