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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Machining performance of laser surface micro-textured drilling tools

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Author(s):
Fernandes de Lima, Milton Sergio [1] ; Ladario, Fabricio Prieto [2] ; Neves, Davi [1] ; Diniz, Anselmo Eduardo [3]
Total Authors: 4
Affiliation:
[1] IEAv, BR-12228001 Sao Jose Dos Campos, SP - Brazil
[2] ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[3] Univ Estadual Campinas, UNICAMP, Fac Engn Mecan, BR-13083860 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: International Journal of Surface Science and Engineering; v. 5, n. 2-3, p. 98-115, 2011.
Web of Science Citations: 6
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. (AU)

FAPESP's process: 07/08265-2 - Characterization of laser treated surfaces by X-ray diffraction
Grantee:Milton Sergio Fernandes de Lima
Support Opportunities: Regular Research Grants