The main defects of laserspotwelding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability,.
焊点中存在的主要缺陷是气孔，表面下塌，热裂纹，其中气孔主要为氧化膜气孔和匙孔不稳定形成的气孔。
2
Laserspotwelding will take the place of the traditional joining methods such as resistance welding and rivet connection for its high precision and high efficiency.
激光点焊具有高精度，高效率等特点，在航空航天工业中有望替代传统的电阻点焊和铆接等连接方法。
3
Using a laser, the robot can make highly accurate welds and position itself for each one a lot faster than it could if it were spot-welding in the normal way.