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Laser Welding
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Laser Welding

The ionization energy of nitrogen is moderate, and the ionization degree under the action of laser is general, which can better reduce the formation of plasma cloud and increase the effective utilization rate of laser. The nitride produced by the chemical reaction of nitrogen and stainless steel can improve the strength of the weld joint, which will be conducive to the improvement of the mechanical properties of the weld, so nitrogen can be used as a protective gas when welding stainless steel.

In laser welding, the protective gas will affect the weld forming, weld quality, weld penetration and weld width, and in most cases, the blowing into the protective gas will have a positive effect on the weld.

(1) The correct blowing into the protective gas will effectively protect the weld pool to reduce or even avoid oxidation.

(2) The correct blowing of the protective gas can effectively reduce the splash generated during the welding process.

(3) The correct blowing of the protective gas can promote the uniform spread of the weld pool during solidification, so that the weld forming is uniform and beautiful.

(4) The correct blowing of the protective gas can effectively reduce the shielding effect of the metal vapor plume or plasma cloud on the laser, and increase the effective utilization rate of the laser.

(5) The correct blowing of the protective gas can effectively reduce the porosity of the weld.

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