INVESTIGATION OF THE IMPACT OF THE NUMBER OF REPETITIONS ON THE CONTRAST OF LASER MARKINGS DURING FIELD MARKING AND DEFOCUSING OF PRODUCTS MADE OF TOOL STEEL

Abstract

This paper is focused on the impact of defocus and the number of repeating during marking of areas upon the contrast with regard to carbon tool steels. Experimental results have been analyzed concerning single marking and double marking at two times higher speed. Similarly, the experiments related to the impact of defocus are in two directions: comparison of results for two fiber lasers with various focus distances and focus above the product surface, immersed in the material.