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Application of Laser Welding Galvanized Steel

The galvanized sheet steel itself has a physical shielding effect, and also has an electrochemical protection effect on the steel itself. It is an essential sheet metal in the industrial market.

The following describes the use of laser welding galvanized steel sheets.

The galvanized layer in the galvanized steel sheet in the traditional welding will reduce the welding process, the tensile strength of the weld is unstable, and the weld has a big problem.

Galvanized steel sheet Nissan is used in: transportation industry, electric power industry, construction industry, chemical industry, ventilation and heating equipment, smart furniture manufacturing industry.

aluminum laser welding machine factory

What is galvanized sheet

Galvanized steel sheet is a layer of metallic zinc on the surface of the steel sheet. This prevents corrosion and prolongs mission life.

3 Welding processes for galvanized steel:

  • Resistance welding
  • Argon arc welding
  • Laser welding

When traditional resistance welding and argon arc welding are used to weld galvanized sheets, the evaporated zinc will be taken away by the molten metal, or the form of bubbles will remain in the weld, which also leads to defects such as pores and cracks in the weld. Seams have low tensile strength.

Laser welding belongs to high-energy beam welding technology, which has the advantages of high energy density, high welding efficiency, large weld depth-to-width ratio, small heat-affected zone, small thermal deformation, and energy saving. It is suitable for the requirements of precision welding technology and is currently the most researched, It is the most widely used welding method in actual production and processing.

aluminum laser welding

4 Advantages of laser welding galvanized steel sheet

  1. Increase the gap between the upper and lower galvanized sheets

Discharge the steam during the welding process to reduce welding instability. When the size of the gap is 0.1 mm, the pulling force is the largest.

  1. Spatter during welding

It is controlled by the defocus amount. When the defocus amount is 5mm, it can not only ensure sufficient pulling force, but also reduce the generation of splash.

  1. Welding power and speed must match

The 1.5mm thick galvanized sheet is welded through, and the maximum welding speed can reach 30mm/s.

  1. Take protective measures for the lens

Air knives are added to welded joints. Can meet 24h continuous production, and minimize consumables.

Regular replacement of protective lenses

During the welding process of galvanized sheet, the zinc on the surface is rapidly heated by the laser, which is easy to gasify and produce splashes, which will seriously damage the lens. Therefore, when designing the welding process, it is necessary to specially design an air knife under the protective lens of the welding joint. Blowing protection to the lens can effectively reduce the production cost.

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FAQ about laser weld galvanized sheet

1.What is the maximum power of 1000w hand held laser welding machine

less than 6kw

2.What are the components of the handheld laser welding machine?

Handheld laser welding machine: laser (generally equipped with 1000-2000W fiber continuous laser), chiller, control software, laser welding head, optical fiber and other components.

3.How long is the service life of handheld laser welding?

Similar to laser cutting, the life of the light source is generally 100,000 hours;


The above are the advantages of laser welding galvanized steel sheets. Laser welding machines can perform micro welding when welding galvanized steel sheets. Welding of micro and small workpieces.

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