Abstract
This chapter describes basic issues concerning lasers (i.e., the phenomenon of laser action, features of laser radiation, construction of laser devices, and various types of lasers). Additionally, selected areas of laser applications in the modern industry were presented. Laser techniques related to the melting of the material, laser melting, various types of laser heat treatment, laser welding, drilling, cutting, and marking of materials with laser were discussed. In addition, laser strengthening techniques developed intensively in recent years and various additive manufacturing techniques using lasers were presented. The advantages and disadvantages of laser processing were also specified in this chapter.
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