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Type: Artigo de periódico
Title: Machining performance of laser surface micro-textured drilling tools
Author: de Lima, MSF
Ladario, FP
Neves, D
Diniz, AE
Abstract: Surface modification of high-speed steel drills using laser has been proposed as a step before physical vapour deposition in order to increase the adhesion of the titanium nitride coating on the tool substrate. A copper vapour laser and a scanning-head system were used to produce highly controlled laser ablation on the surface. In the current work, the laser average power varied from 0.5 to 6 W and the laser shots were applied next to one another. After laser surface modification and coating, the drills were used to machine low-alloy carbon steel and stainless steel in a CNC machine. The tool lives were then compared to those obtained with the same kind of tool but whose substrate was prepared conventionally. The laser-treated drills had a longer lifetime than conventional ones. Under the conditions of this study, the laser-treated drills presented a 40% higher performance than conventional drills for carbon steel machining. The increase in performance reached 400% in stainless steel drilling. In general, laser processing with an average power of 1 W yielded the best results.
Subject: laser surface treatments
machining processes
surface modification
surface micro-structuring
non-conventional processes
steel machining
Country: Suíça
Editor: Inderscience Enterprises Ltd
Rights: embargo
Identifier DOI: 10.1504/IJSURFSE.2011.041396
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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