In the field of industrial manufacturing, laser welding machines have become the preferred equipment for welding iron plates. However, in the face of different welding requirements, how should one choose the appropriate shielding gas and welding wire? Next, we will provide a professional explanation on the selection of gas and welding wire when using a laser welding machine to weld iron plates.
Handheld laser welding machine
What protective gas is used for welding iron plates with a laser welding machine?
1. Argon (Ar
Features: Argon is an inert gas with excellent protective performance and can effectively prevent weld oxidation.
Applicable scenarios: It is suitable for most iron plate welding, especially in situations where high weld quality is required.
Advantages
The weld surface is smooth and free of oxides.
The weld seam has high strength and good sealing performance.
Disadvantage: The cost is relatively high.
2. Nitrogen (N₂
Feature: Nitrogen is also a common protective gas with a relatively low cost.
Applicable scenarios: Suitable for general requirements of iron plate welding.
Advantages
The cost is relatively low
It can prevent weld oxidation to a certain extent.
Disadvantages: The protective effect is not as good as that of argon gas, and it is prone to generating nitrides, which affects the quality of the weld seam.
3. Mixed gas
Common combinations: argon + carbon dioxide (Ar + CO₂) or argon + helium (Ar + He).
Feature: The mixed gas combines the advantages of different gases, enhancing the welding performance.
Applicable scenarios: It is suitable for occasions where there are high requirements for weld quality and cost reduction is needed.
Advantages
It combines the protective performance of argon with the economic benefits of carbon dioxide or helium.
The mechanical properties and appearance quality of the weld seams have been improved.
Disadvantages: It requires precise control of the mixing ratio and the operation is relatively complex.
Laser welding shielding gas
Ii. What kind of welding wire is used for welding iron plates with a laser welding machine?
Solid welding wire
Features: Solid welding wire is made of pure metal and contains no coating.
Applicable scenarios: Suitable for most iron plate welding.
Advantages
The welding process is stable with little spatter.
The weld quality is high and the appearance is beautiful.
Laser welding machines do not necessarily require the use of welding wire when welding iron plates.
If the iron plate to be welded is relatively thin and the requirement for welding strength is not high, under appropriate parameters such as laser power and welding speed, self-fusion welding can be directly carried out without the use of welding wire.
However, if the iron plate to be welded is relatively thick or there are high requirements for welding strength, sealing performance, etc., it may be necessary to use welding wire to fill the weld seam to ensure the welding quality.
Iii. Precautions for Welding Iron Plates with Laser Welding Machines
Clean the surface: Thoroughly clean the surface of the iron plate before laser welding to remove oil stains, rust and other impurities to ensure the welding quality.
Preheating treatment: For thicker iron plates, appropriate preheating treatment should be carried out to reduce welding stress and deformation.
Post-treatment: After welding is completed, necessary inspections and treatments should be carried out on the weld seams to ensure they meet quality standards.
Laser welding machine
When a laser welding machine is used to weld iron plates, choosing the appropriate shielding gas and welding wire is the key to ensuring the welding quality. Argon is widely used due to its excellent protective performance, while solid welding wire is favored for its stable welding process and high-quality weld seams. By rationally selecting gases and welding wires and optimizing process parameters, efficient iron plate welding can be achieved, meeting the demands of various industrial applications.
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Post time: 25-11-25
