Principle and advantages of laser welding

Laser welding technology has the effect of weld pool purification, which can purify the weld metal. It is suitable for welding between the same and different metal materials. Laser welding with high energy is especially advantageous for metal welding with high melting point, high reflectivity, high thermal conductivity and great difference in physical properties.

The main advantages of laser welding are high speed, deep penetration and small deformation. Can be welded at room temperature or under special conditions. The laser beam will not shift when it passes through electromagnetic field; the laser can weld in air and some gas environment, and can weld glass or transparent materials. After laser focusing, the power density is high, and the ratio of depth to width can reach 5:1, and the highest ratio can reach 10:1. It can weld refractory materials, such as titanium, quartz, etc., and can weld different materials with good effect. For example, when copper and Hyun are welded together, the qualification rate can reach 100%. It can also be used for micro welding. After being focused, the laser beam can obtain a very small spot, which can be precisely positioned. It can be applied to the assembly and welding of micro components in large-scale automatic production, such as integrated circuit lead, watch float wire, picture tube electron gun assembly, etc. Due to the use of laser welding, the production efficiency is high, the heat affected area is small, and the solder joints are pollution-free.