Reasons and solutions for black welding in laser welding

Reasons for black welding in laser welding
The blackening of laser welding is generally caused by the following reasons:

1. Gas pollution: During laser welding, impurities in the gas may cause incomplete melting, resulting in blackening of the weld surface.
2. Insufficient energy: If the energy of the laser is insufficient, the temperature of the weld may not be high enough, resulting in incomplete welding. In this case, the welding area is also prone to blackening.
3. Improper welding material: If the welding material used is not suitable for laser welding, it is easy to cause blackening of the weld seam.
4. Unreasonable process parameter settings: If the process parameter settings are not reasonable, the temperature, energy, speed and other parameters of the weld may have adverse effects on the welding, resulting in blackening of the weld surface.

Laser welding has a black effect on welding
Blackening welding can have an impact on quality, durability, and product appearance. If the product requires a smooth and beautiful appearance, the occurrence of blackened welds will lead to a decrease in overall aesthetics and even affect overall quality.

Laser welding black welding solution
1. Optimize process parameters: Optimizing the process parameters of laser welding, including laser power, speed, frequency, etc., will help solve the problem of blackening in the weld seam.
2. Choose the correct welding materials and gases: Choose welding materials and gases that correspond to the workpiece, which will reduce the possibility of blackening of the weld seam during the welding process.
3. Reduce gas pollution: Control the quality of the gas throughout the welding process, minimize the impurity content in the gas as much as possible, which is also an effective method to avoid blackening of the weld seam.
4. Increase the energy of the weld seam: Solve the problem of incomplete welding by increasing the energy of laser welding. Adding energy in laser welding can increase the width of the scanning line, which can better fuse the welded parts and cause blackening of the weld surface.

In summary, the issue of blackening during laser welding not only affects the overall aesthetics and mechanical performance of the product, but also impacts work efficiency and personnel safety. Therefore, the correct welding techniques and material selection are crucial for welding work.