Preparation of large size aluminium alloy cylindrical preforms by multi-layer spray deposition

Preparation of large scale aluminium alloy cylindrical preforms have been studied by the methods of verticalspray deposition and tilted spray deposition respectively. The results show that aluminium alloy cylindrical preforms of asize up to d320 mm × 500 mm can take shape well by applying multi-layer tilted spray deposition technology if the processis controlled properly. The spray system scans in a radius ranging from the center to the rim of the preform, and the velocity is inversely proportional to the displacement. The multi-layer deposited preforms exhibit high cooling rate. The larg-er the diameter is and the higher the cooling rate and yield are