Infrared lasers perform outstandingly in many industrial application fields, but they are not suitable for the processing of non-ferrous metals, especially copper and copper alloy materials. The main reason is that non-ferrous metals have a very low absorption rate of infrared lasers within the wavelength range of 1000nm. In contrast, non-ferrous metals have a high absorption rate of blue laser with a wavelength of about 455nm.

In the welding of copper, the processing efficiency of blue lasers is nearly 15 times higher than that of traditional infrared lasers. At the same time, blue laser welding can achieve a larger process range, high-quality welds without spatter and pores, as well as higher mechanical strength and lower resistivity, which greatly improves the yield rate and shortens the production downtime. The advantages of blue lasers are also reflected in the fact that they can easily achieve dissimilar metal welding of copper with ferrous metals such as steel, stainless steel, and non-magnetic steel, as well as the cladding of traditional ferrous metal alloys on the surface of copper materials and the cladding of copper and copper alloy materials on the surface of steel materials, which cannot be achieved by infrared lasers. For gold, silver, aluminum, and other highly reflective metals, compared with infrared laser welding, blue laser welding is faster and of higher quality.

Hall laser’ blue-infrared hybrid laser welding solution superimposes a blue spot outside the infrared spot to improve the welding temperature field. The blue laser with low brightness and high absorption is used to heat the base material, forming a molten pool on its surface. This improves the stability of the molten pool, basically eliminating spatter and voids during the welding process, and making the appearance of the weld smooth and flat.