Author(s):
1. Nikolay Angelov, Technical University of Gabrovo, Department of Physics, Chemistry and Ecology 4 Hadzhy Dimitar str., Bulgaria

Abstract:
The studies relate to the process of laser marking by melting on the samples of structural steel. The zone of Raleigh for fiber laser was determined. The theoretical dependences of the diameter of the working spot from defocusing and diameter of the radiation falling on the lens, were received. Experiments were realized with structural steel 50G. The dependence of contrast of marking from defocusing for two power densities was made. Working intervals were determined for studied magnitudes for visual perception of the marking.

Key words:
laser marking,structural steel,fiber laser,contrast,defocusing,working intervals.

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
17.06.2015.

Conference:
Contemporary Materials 2015 - Savremeni Materijali

Final paper