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The damage caused by welding deformation and the main factors affecting welding deformation-superwave laser welding machine

Superwave Laser Technology Co.,Ltd | Updated: Nov 30, 2017

The application of laser welding in stainless steel occupies a very important position, especially in the automobile industry, which is connected by welding. However, under the influence of many factors, the welding of stainless steel plate has the problem of deformation and is difficult to control, which is not conducive to the sustainable development of relevant fields.

Laser welding mainly refers to a kind of welding method which can be used as a heat source to melt and connect the workpiece. During the laser welding process, the laser irradiated to the surface of the welded material, and its effect, part of it was reflected, the remaining absorbed, inside the material, completing the welding target. In short, the process of laser welding is used by the optical system of high power laser beam after focusing, exposure to the surface of welding material, and then make full use of the materials of light energy absorption for heating treatment yuan finally after cooling form a melt welding process of welded joint. Usually, laser welding is mainly divided into two types: thermal conduction welding and deep fusion welding.
The damage caused by welding deformation and the main factors affecting welding deformation

The main factors affecting welding deformation are welding current, pulse width and frequency. The welding current increases and the weld width increases accordingly, and the spatter and other phenomena occur gradually, resulting in the oxidation and deformation of the weld surface, accompanied by a rough feeling. Pulse width increases, increase strength of welded joint, when the pulse width to a certain extent, the material on the surface of the heat transfer energy consumption also will increase, make the liquid evaporation from the molten pool spatter, lead to solder joint sectional area is smaller, affect the joint strength; The influence of welding frequency on the welding deformation of stainless steel plate is closely related to the thickness of steel plate. For example, in the case of 0.5mm stainless steel plate, the weld overlap ratio is higher when the frequency reaches 2Hz. When the frequency reaches 5Hz, the weld is severely burned, and the area of thermal influence is wide, resulting in deformation. Therefore, it is imperative to strengthen the effective control of welding deformation.