Surface roughness of cut
The surface roughness depth of the cut face measures microscopic irregularities and grooves on the workpiece edge. Low values reduce post-processing.
Physical-Chemical Mechanism of Action
The surface roughness of the cut surface results from microscopic irregularities and grooves that occur during cutting. These can be caused by vibrations in the tool, unstable gas flows, or particle impact.
Metallurgical Relevance & Risks in Welding
High surface roughness can lead to uneven stresses and cracks. It increases susceptibility to corrosion and reduces the service life of the workpiece. When welding, high roughness can lead to poor joints and porosity.
Workshop Practice & Action Instructions
To minimize surface roughness, use sharp tools and controlled cutting parameters. Keep the cutting angle constant and avoid excessive speeds. For fine work, a polishing phase after cutting can be helpful.