You are here: Home » News » Consulting Center » Can A Laser Welding Machine Weld Materials Like Galvanized Sheets, Stainless Steel, And Aluminum Alloy without Any Additional Treatment?
Can A Laser Welding Machine Weld Materials Like Galvanized Sheets, Stainless Steel, And Aluminum Alloy without Any Additional Treatment?
Views: 0 Author: Site Editor Publish Time: 2025-02-11 Origin: Site
Laser welding machines can weld galvanized sheets, stainless steel, and aluminum alloy. Some additional treatments are typically required before welding, as follows:
Galvanized Sheets Weldability:
Laser welding machines can weld galvanized sheets. The concentrated energy and small heat-affected zone of laser welding can reduce the evaporation and damage of the zinc layer during the welding process to some extent, ensuring weld quality. Additional Treatments:
Surface cleaning: Ensure the sheet surface is clean and free from oil, dust, and other impurities before welding. Rust removal may be necessary to improve weld quality and seam appearance.
Removal of zinc layer: For corner welding, consider mechanically grinding the zinc coating around the welding area, removing the galvanized layer before welding to reduce spatter and porosity.
Design of vent holes: When using stacked lap joints, design vent holes between galvanized steel sheets to allow the zinc vapor to escape smoothly, improving joint quality.
Stainless Steel Weldability:
Laser welding machines are very suitable for welding stainless steel. Laser welding can achieve high-quality stainless steel joints that maintain the corrosion resistance and mechanical properties of stainless steel. Additional Treatments:
Surface cleaning: The stainless steel surface must be cleaned before welding to remove oil, oxide scale, rust, and other impurities to prevent these impurities from entering the weld pool and causing porosity and inclusion defects.
Selection of filler material: Generally, filler materials similar to the base material are chosen. If there are no special requirements, self-melting welding can be performed without adding filler materials.
Aluminum Alloy Weldability:
Laser welding is widely used in aluminum alloy welding. Although aluminum alloys have a lower absorption rate for laser and are prone to porosity and thermal cracking during the welding process, good welding results can be achieved through reasonable process measures and equipment parameter adjustments. Additional Treatments:
Surface pretreatment: Due to the formation of a dense oxide film on the surface of aluminum alloys and their low absorption rate for laser, pretreatment measures such as sandpaper grinding, chemical etching, or surface plating can be used to increase the material's absorption rate for laser.
Adjust welding parameters and processes: Adjusting laser power waveforms, changing the angle of laser beam incidence, applying a magnetic field during the welding process, etc., can reduce porosity produced during welding. When using YAG lasers, the pulse waveform can be adjusted to control heat input and reduce crystallization cracks.
Addition of alloy elements: When welding aluminum alloys, adding some low-boiling point alloy elements can help the formation of small pores and the strength of the weld.
If you have welding machine requirements, please contact Ms. Zhao
Founded in 2006, PDKJ is a professional supplier of welding automation solutions. The company has passed the ISO9001 international quality management system certification, has more than 80 officially authorized and applied national patents, and a number of core technologies in the welding field fill the technical gap at home and abroad. It is a national high-tech enterprise.
