| Texto completo | |
| Autor(es): |
Fernandes de Lima, Milton Sergio
[1]
;
Ladario, Fabricio Prieto
[2]
;
Neves, Davi
[1]
;
Diniz, Anselmo Eduardo
[3]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [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
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | International Journal of Surface Science and Engineering; v. 5, n. 2-3, p. 98-115, 2011. |
| Citações Web of Science: | 6 |
| Resumo | |
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) | |
| Processo FAPESP: | 07/08265-2 - Caracterização de superfícies tratadas com laser por difração de raios-X |
| Beneficiário: | Milton Sergio Fernandes de Lima |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |