1) The laser beam has a high energy density, the heating process is extremely short, the solder joint is small, the heat affected zone is narrow, the welding deformation is small, and the weldment dimensional accuracy is high;

2) It is possible to weld materials that are difficult to weld by conventional welding methods, such as welding refractory metals such as tungsten, molybdenum, niobium, and zirconium;

3) It is possible to weld non-ferrous metals in the air without the need for additional protective gas;

4) Laser welding equipment is more complicated and costly.

Laser welding can weld low-alloy high-strength steel, stainless steel and copper, nickel, titanium alloy, etc.; dissimilar metals and non-metallic materials (such as ceramics, plexiglass, etc.); currently used in electronic instrumentation, aviation, aerospace, nuclear reactors, etc.