1. The morphology of the cutting surface is divided into two distinct parts. The surface of the upper part is flat and smooth, the cutting stripes are neat and fine, and the roughness value is small; The lower cutting stripes are disordered, the surface is uneven, and the roughness value is large. The upper part is characterized by the direct action of laser beam, while the lower part is characterized by the erosion of molten metal.
Whether it is continuous laser cutting or pulse laser cutting, the cutting surface is shown with upper and lower parts. The difference is that the pulse laser cutting and the upper cutting stripes have a corresponding relationship with the pulse frequency: the higher the frequency, the finer the stripes, and the smaller the surface roughness.
2. The surface roughness in the upper area of the cutting surface is generally uniform and does not change with the height; The surface roughness of the lower area changes with the height, and the closer to the lower edge, the greater the surface roughness value.