The effect of the speed of movement of the laser cutting head during processing of the 12X18H10T alloy on the quality of the resulting surface
Authors
N. Yu. Kapalin
Omsk State Technical University, Omsk
O. O. Berdnikov
Omsk State Technical University, Omsk
D. S. Rechenko
Omsk State Technical University, Omsk
B. A. Lopatin
South Ural State University, Zlatoust Branch, Zlatoust
Keywords:
laser cutting, speed of movement of the laser cutting head, surface roughness, modified layer, DMG LASERTEC 20, nitrogen
Abstract
The effect of the speed of movement of a laser cutting head during processing of a 12X18H10T alloy on the quality of the formed cutting surface and the thickness of the modified layer (IC) is investigated. The experiments were carried out on a DMG LASERTEC 20 installation using nitrogen as a protective and blowing gas. Two experimental cycles were performed at laser radiation powers of 1300 and 1400 watts. In each cycle, six samples were processed with a change in the speed of movement of the laser cutting head in the range of 200–700 mm/min at fixed values of pulse frequency, gas pressure and focal length. The surface quality was assessed according to the roughness parameter Ra, and the thermal effect was carried out according to the thickness of the IC h. It is established that the speed of movement of the laser cutting head has a nonlinear effect on the roughness of the treated surface and the depth of the thermal treatment, as well as determines the boundary of stable cutting of the material.
