Abstract
The purpose of this paper is to show the effect of tool materials surface treatment while using laser texturing on the structure and properties of cemented carbides and sialon ceramics. The tests were made on multi-point inserts subjected laser texturization and honeycomb-like texture was obtained. Comprehensive investigations in the scanning electron microscope (SEM) were made. Morphology was examined by the use of atomic forces microscope (AFM) and confocal microscope. The chemical composition of the tested materials using energy-dispersive X-ray spectrometer (EDS) was investigated. Moreover, exploitative properties, including wear resistance using the "pin on disc" method and roughness, were also tested. It was found that the laser texturing provides a suitable modification of the structure improving tribological properties. Tests suggest that laser texturing can contribute to the durability of cutting tool’s edge, which qualifies this type of surface treatment for wide industrial applications.
Highlights
Tool materials that are used on the cutting edges during work are exposed to high loads caused by the resistance of the workpiece, because of these, various methods of improving their cutting properties are used
Investigations that were conducted in the scanning electron microscope confirmed the formation of a honeycomb-like microstructure and the occurrence of lubrication reservoirs (Figure 2)
Detailed studies allow for stating that the selective laser texturing of the surface layer of tested tool materials causes fragmentation of the microstructure within the zone of laser beam impact
Summary
Tool materials that are used on the cutting edges during work are exposed to high loads caused by the resistance of the workpiece, because of these, various methods of improving their cutting properties are used. The improvement of the usable properties of sintered cutting edges for dry cutting at high speeds is possible by modifying the chemical composition or changing the edge geometry, but above all by using special surface treatment that consists of manufacturing wear resistant coatings by physical vapor deposition PVD or chemical vapor deposition CVD methods [1,2,3,4]. Few attempts have been made to improve the mechanical properties of this material group through the use of laser surface texturing [5,6]. Laser radiation enables many precise technological operations on various materials due to its properties, with efficiency and accuracy that are far superior to conventional methods. Laser treatment is characterized by non-contact, selectivity, and possibility of full automation
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