Abstract
An effective strategy to produce grooves on carbon steel substrates by nanosecond laser radiation is proposed. The aim is to increase the productivity of grooves creation. In this study, two different modes of laser treatment are compared. The first mode focuses on the evaporation of material, while the second focuses on the formation of melted material and its removal by the action of pressure vapors produced by evaporated material. Within some ranges of processing parameters, the shape of the groove can be linearly controlled. The dependence of the groove depth also has a logarithmic nature when the number of passes is increased. Using the liquid phase mode in some ranges of parameters can reduce the amount of evaporated material in comparison with standard techniques in which the material is removed in the form of gas, and fine dust is emitted.
Highlights
Among technological operations involving laser radiation, the ablation of metals does not lose its relevance
Studies of the melting pool behavior during laser processing by nanosecond pulsed laser sources may increase the efficiency of the ablation process when the area of material removal is larger than the size of the laser beam
This study focuses on the relationship between the input and the investigated parameters at which there is a significant formation and movement of molten material from the processing zone when the metal is irradiated with the focused radiation of a 100 W IR nanosecond laser
Summary
Among technological operations involving laser radiation, the ablation of metals does not lose its relevance. Studies of the melting pool behavior during laser processing by nanosecond pulsed laser sources may increase the efficiency of the ablation process when the area of material removal is larger than the size of the laser beam. Studies focused on increasing the efficiency of laser removal of metals when the removal region is much larger than the size of the laser beam spot have not yet been found in the literature In this context, this study focuses on the relationship between the input and the investigated parameters at which there is a significant formation and movement of molten material from the processing zone when the metal is irradiated with the focused radiation of a 100 W IR nanosecond laser. One strategy ensures preferential evaporation of the material, and the other the formation and removal of molten material from the processing area under the influence of vapor pressure
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