Shielding Gas in Handheld Laser Welding

In the process of laser welding, the use of protective gas is crucial as it creates a protective atmosphere in the welding area, preventing the molten pool and weld from reacting with oxygen, nitrogen, and other elements in the surrounding environment. This helps reduce oxidation and contamination, ensuring welding quality.

In handheld welding processes, the commonly used protective gas is inert gas, with argon being the most common choice.

Argon is a colorless, odorless, and non-toxic gas with excellent inert properties, meaning it does not chemically react with most metals. As a result, it is widely used for welding stainless steel, aluminum, nickel alloys, and other metals. In handheld welding machines, argon is typically jetted out near the welding head through a nozzle or gun to envelop the welding area, creating a protective atmosphere.

There are two main methods for using auxiliary gas:

1. External Jetting: Protective gas is jetted out from a nozzle or gun near the laser welding head, enveloping the welding area. This method is suitable for manual welding or cases requiring a larger jetting volume.

2. Internal Jetting: Protective gas is jetted out from inside the laser welding head, directly protecting the molten pool and weld. This method is suitable for automated welding or cases requiring more precise protection.

The flow rate and pressure of the protective gas need to be adjusted and optimized according to specific welding conditions and requirements. Welder using handheld welding machines should ensure the correct setup and use of protective gas to achieve high-quality welding results.

What Materials Can the Handheld Laser Welding Machine Weld?

Handheld Laser Welding Machine Metals: Aluminum, copper, brass, steel, titanium, and nickel, as well as various metal alloys.

It is important to note that different types of materials may require different laser powers and parameters to achieve effective welding. Some highly reflective materials (such as silver, copper, etc.) may pose challenges in laser absorption and welding. Additionally, for complex material structures or combinations, specific nozzle and process controls may be needed to achieve the desired welding results.

Therefore, before choosing the proper laser welding for a specific material, it is recommended to conduct experiments and tests based on the properties and requirements of the material to determine the most suitable welding parameters and methods.