There are many manufacturers using laser welding stainless steel workpieces, and the welding effect is also very good. Compared with traditional welding, low-power pulsed laser seam welding has high power density, energy concentration, small heat input, narrow weld seam and small deformation Advantages, and after the laser beam is focused, a small spot can be obtained and precise positioning can be achieved. These characteristics make laser seam welding more suitable for welding small-sized workpieces than other welding methods. For the laser welding of ultra-thin stainless steel materials, because the material is very thin, it is easy to vaporize and perforate, in order to obtain a continuous, no burn-through weld. The key is precise control of the parameters.
The main parameters that affect the welding quality of the laser welding machine are welding current, pulse width, pulse frequency, etc. If the current increases, the width of the weld increases, the welding process gradually splashes, and the surface of the weld oxidizes, and There is a rough feeling, as the pulse width increases, the width of the weld seam also increases. The change of pulse width has a very significant effect on the laser welding effect of stainless steel ultra-thin plates. The slight increase of the pulse width may cause the sample to be oxidized and burned through. With the increase of the pulse frequency, the overlap rate of the welding spot increases, and the weld width first increases. After the basic remains unchanged. Observed under a microscope, the weld is getting smoother and more beautiful. However, when the pulse frequency is increased to a certain value, the welding process is severely splashed, the weld seam becomes rough, and the upper and lower surfaces of the weldment are oxidized.
