PROCESS OF MACHINING METALLIC MATERIALS BY APPLICATION OF SURFACE ENGINEERING PRINCIPLES

摘要

The invention relates to a process for machining metallic materials by application of surface engineering principles, in order to increase the corrosion resistance of the surface of these materials, the process replacing the sand blasting operation performed prior to powder deposition, which reduces the corrosion resistance of said materials. According to the invention, the process uses a laser beam with a certain wave length and pulse duration, a certain pulse energy value and a repetition frequency, by using a focusing lens of a certain focal distance, the laser beam being projected onto the surface to be machined either focused or unfocused, on a component in relation to which the relative motion laser beam spot - component to be machined takes place with variable speed, the movement being effected either by the piece fixed onto a table which moves on xoyz coordinates or by a cartesian robot, a CNC system or even by the laser beam, by scanning, if the technological system allows it, where the laser beam - piece surface interaction zone is protected by 99% pure argon or another inert gas, thereby achieving, due to this relative motion between the laser beam and the piece, a structure of variable shape depending on the technical characteristics of the working equipment employed and the material to be machined, respectively.