One of the main concerns of working with laser flame is a possibilty that the cutting process transitions into an uncontrollable autogenous mode. In this mode, the metal outside the laser beam's zone of impact is heated to the combustion temperature, increasing the width of the cut and its roughness. During laser-oxygen cutting of steel, difficulties may arise with the presence of cut-out parts and sharp edges of small-diameter holes. In these cases, it is better to use a high-pressure inert gas for cutting. Air can also be used, however laser cutting with air can potentially form a burr that is difficult to remove.
Laser-oxygen cutting ensures a high quality of the cut's end surface and only minor burr on its lower edge.