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What materials can the handheld laser welding machine weld?

Apr 24,2023 | TOPTEK

Hand-held laser welding machine has become an emerging industrial technology in industrial welding processing due to its advantages of fast welding speed, high precision, high efficiency, and smooth and beautiful weld seam. Handheld laser welding machines are widely used, but many people don't know what materials the laser welding machine can weld.

1. Die steel
The handheld laser welding machine is suitable for welding various types of mold steel, and the welding effect is better.
2. Carbon steel
Carbon steel is welded with a hand-held laser welding machine, and the effect is good. Welding quality depends on the impurity content. In order to obtain good weld quality, preheating is required when the carbon content exceeds 0.25%. When steels with different carbon contents are welded to each other, the welding torch can be slightly biased to the side of low-carbon materials to ensure the quality of the joints. Because the heating rate and cooling rate of the laser welding machine are very fast during welding, so when welding carbon steel. As the carbon content increases, so does the weld crack and notch susceptibility. Both medium and high carbon steels and common alloy steels can be laser welded well, but require preheating and post-weld treatment to relieve stress and avoid cracks.

3. Alloy steel
For laser welding of low-alloy high-strength steel, as long as appropriate welding parameters are selected, joints with mechanical properties equivalent to those of 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 fast welding speed and small heat-affected zone of laser welding, the overheating phenomenon and the adverse effects of large linear expansion coefficient during stainless steel welding are reduced, and the weld seam has no defects such as pores and inclusions. Compared with carbon steel, stainless steel is easier to obtain deep penetration and 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 good appearance and smooth and beautiful weld seams.

5. Copper and copper alloys
Welding copper and copper alloys is prone to problems of lack of fusion and penetration. Therefore, a heat source with concentrated energy and high power should be used, and preheating measures should be taken; later, it is easy to produce large deformation, and when the welding joint is constrained by large rigidity, it is easy to produce welding stress; when welding copper and copper alloys, it is also easy to It is easy to produce thermal cracks; porosity is 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 rises, the solubility of hydrogen in aluminum increases sharply, and the dissolved hydrogen becomes the defect source of the weld, and many pores appear in the weld. , There may be voids in the root during deep penetration welding, and the weld bead is poorly formed.
Laser welding can weld far more than these materials. Laser welding can be performed between a variety of dissimilar metals. Research shows that it is suitable for laser welding of copper-nickel, nickel-titanium, copper-titanium, titanium-molybdenum, brass-copper, carbon steel-copper and other dissimilar metals under certain conditions.

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