Abstract
In order to obtain better cutting tool performance, the coatings appear as an alternative in the machining process. The goal of the coating is to improve tribological conditions in the chip-tool and tool-workpiece interfaces. On the other hand, the use of coated tools decreases the wear of the tools. This study discusses the ceramic coatings characterization deposited in WC tools. The Al2O3 and TiO2 films present properties such as thermal stability, chemical inertia, high hardness, and good mechanical properties. These coatings were prepared by sol-gel technology. The results indicated that the multilayer coating presents better adhesion on the substrate. Moreover, lower coefficients of friction were found for the coated tools. The analysis of variance (ANOVA) was used to evaluate the influence of the cutting parameters and tool coating on the cutting force. The lower cutting force was obtained using the multilayer-coated tool. Thus, the sol-gel method appears as a novel technique to deposit coating in the WC tools to improve their performance.
Highlights
The machining is one of the most applicable processes in the manufacture of metals
The results demonstrated that an increase in thickness delays the substrate exposure, which contributes to increasing the tool’s life
It was observed thatdiffraction the diffraction peaks coincided with the that the peaks coincided with the boehmite boehmite phase-AlO(OH)
Summary
The machining is one of the most applicable processes in the manufacture of metals. For this reason, different researchers have focused their efforts on tool improvement and optimization of cutting parameters [1]. One is the most technique for thealumina deposition of sol-gel film principally because it allows coating the pin-disc testcomplex established that the alumina layers improve the of tribological behavior of the stainless materials with geometries Such a technique consists three main steps: immersion and steel substrate, and reduce wear and damage. TiO2 coatings willanti-corrosive be processed relatively high hardnessatat elevated temperatures, andAl2good mechanical and by the sol-gel method and deposited onto tungsten carbide substrate by dip-coating This is the properties [19,20]. Regardless of the presence of coating on the surfaces of the insert, the authors concluded that the main reason for the poor machinabilities (flank wear) of the CGI (and NGI as well) is that the generated cutting temperatures are much higher than for the FGI. Different cutting conditions have been used during the machining tests to measure the corresponding cutting force and the results were treated using the analysis of variance (ANOVA)
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