What Are The Defects of Laser Welding Machine

Analysis of welding defects of laser welding machine: In the welding process, due to the improper selection of welding materials, welding environment and welding process, laser welding machine is easy to produce welding defects. The occurrence of welding defects not only affects the beauty of welding parts, but also affects the application of laser welding parts. So, in the laser welding process, how are the defects produced?

Weld appearance defects: In the laser welding process, the appearance shape of the weld is crucial to improve the quality of structural parts. Therefore, in the process of laser welding, it is necessary to control the shape of the weld.

Common appearance defects in laser welding include: weld accumulation, edge biting, weld indentation and sinking, weld overhang or uneven thickness, weld uneven, weld surface porosity and weld nodules.

Laser welding machine is a kind of green and energy-saving laser welding equipment. Compared with the traditional welding machine, the welding speed is fast, the heat affected zone is small, and the welding surface is smooth. However, if the laser welding machine is used improperly, there will still be welding defects, which also reminds us that the laser welding machine also needs to follow the welding process and reasonable operation in order to have good welding results.

Welding hot crack refers to the welding process, when the weld and heat affected zone metal cooling to the high temperature near the solid phase line of the crack. Generally can be divided into high temperature crack and low temperature crack. In the process of laser welding, because the laser heat input is small, welding deformation is small, welding stress is small, generally there will be no high temperature cracks.

However, due to different materials and improper selection of process parameters, high-temperature cracks sometimes occur. However, the crack of high strength steel and low alloy steel when the temperature is lower than MS or 300℃ during the welding process is called low temperature crack.