铝合金轮毂的激光增材修复工艺研究

Laser Additive Repairing Technology of Aluminum Alloy Wheel Hub

以2A14铝合金轮毂为研究对象,选用AlSi10Mg粉末,利用激光增材制造技术修复典型的破损2A14铝合金轮毂,优化激光增材制造工艺,当激光功率为2800W、光斑直径为3mm、送粉速率为10g/mm、搭接率为30%、扫描速率为480mm/min、基板厚度为10mm时,成形试样内部组织最为均匀,品质和打印效果最为理想。2A14铝合金轮毂修复区域填充饱满,加工处理后修复区域表面光滑,且无明显的裂纹和气孔等缺陷产生,达到使用要求。

Taking 2A14 aluminum alloy wheel hub as object,the crack damage was repaired by laser additive manufacturing technology using AlSi10Mg powder,and the laser additive manufacturing process was optimized.With the laser power of 2800 W,spot diameter of 3 mm,powder delivery rate of 10 g/mm,the lap rate of 30%,the scanning rate of 480 mm/min and the thickness of the substrate of 10 mm,the internal microstructure of forming specimens is the most uniform with desirable quality and printing effect.Repairing area of 2A14 aluminum alloying wheel hub is fully filled,which exhibits smooth surface without obvious cracks and porosities after processing,meeting the usage requirements.