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What materials can be welded by a handheld laser welding machine?

The handheld laser welding machine has become an emerging industrial technology in industrial welding processing with its advantages of fast welding speed, high precision, high efficiency, and smooth and beautiful welds. Hand-held laser welding machines are widely used, but many people do not know what materials can be welded by laser welding machines.



1. Die steel


The handheld laser welding machine is suitable for welding various types of die steel, and the welding effect is better.


2. Carbon steel


Carbon steel is welded with a handheld laser welding machine, and the effect is good, and the quality of its welding depends on the content of impurities. To obtain good welding quality, preheating is required when the carbon content exceeds 0.25%. When steels with different carbon content are welded to each other, the welding torch can be slightly biased to the side of the low-carbon material to ensure the quality of the joint. Since the heating speed and cooling speed of the laser welding machine are very fast during welding, it is used when welding carbon steel. As the carbon content increases, the susceptibility to weld cracks and notches will increase. Both medium and high carbon steel and ordinary alloy steel can be well laser welded, but preheating and post-welding treatment are required to eliminate stress and avoid cracks.


3. Alloy aluminum


For laser welding of low-alloy high-strength steel, as long as the selected welding parameters are appropriate, a joint with mechanical properties equivalent to the base metal can be obtained.


4. Stainless steel


In general, stainless steel welding is easier to obtain high-quality joints than conventional welding. Due to the high welding speed and small heat-affected zone of laser welding, the overheating phenomenon and the large linear expansion coefficient of stainless steel welding are alleviated, and the welding seam has no defects such as pores and inclusions. Compared with carbon steel, stainless steel is easier to obtain deep penetration narrow welds due to its low thermal conductivity, high energy absorption rate, and melting efficiency. Welding thin plates with low-power laser welding can obtain joints with a well-formed appearance and smooth and beautiful welds.


5. Copper and copper alloys


Welding copper and copper alloys are prone to problems of infusion and incomplete penetration. Therefore, concentrated energy and high-power heat source should be used with preheating measures; when the thickness of the workpiece is thin or the structural rigidity is small, and there is no measure to prevent deformation, welding Later, it is easy to produce larger deformation, and when the welded joint is subject to greater rigidity, it is easy to produce welding stress; it is also easy to produce hot cracks when welding copper and copper alloys; pores are a common defect in copper and copper alloy welding.


6. Aluminum and aluminum alloy


Aluminum and aluminum alloys are highly reflective materials. When welding aluminum and its alloys, as the temperature increases, the solubility of hydrogen in aluminum increases sharply. The dissolved hydrogen becomes a source of defects in the weld, and there are many pores in the weld. , And there may be a cavity in the root during deep penetration welding, and the weld bead formation is poor.


The laser welding machine can weld far more than these materials. Laser welding can be carried out between a variety of dissimilar metals. Research has shown that it is applied to copper-nickel, nickel-titanium, copper-titanium, titanium-molybdenum, brass-copper, and low-temperature materials. Carbon steel-copper and other dissimilar metals can be laser welded under certain conditions.

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