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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Elimination of Lubricants from Aluminum Cold Rolled Products Using Short Laser Pulses

Texto completo
Autor(es):
M.S.F. Lima ; J.-D. Wagnière ; S.P. Morato ; N.D. Vieira Jr.
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 5, n. 2, p. -, Jun. 2002.
Resumo

This work presents a new technique to remove the surface impurities from the aluminum cold-worked sheets. The method consists to concentrate a short-time high-power pulsed laser on the materials surface and scan it in order to cover a desired area. Incrustations ablation is obtained as long as the fluency and the peak power are high enough to produce vaporization of the contaminated layer without affecting the material surface properties. The present problem consists in eliminating a desiccated soap of about 1 g/m² from the surface of a 6016-class aluminum alloy sheet. The soap is originated from the rolling process. The present laser method is intended to replace water washing when the piece cannot be soaked, when drying is difficult due to the geometry, or when environmental restrictions apply. Best results were obtained when the pulse length was 100 ns and the average laser power was 95 W. In these conditions, the surface was completely cleaned and the aluminum alloy did not suffer any structural modification. (AU)

Processo FAPESP: 01/04159-7 - Preparação de superfícies de aço por laser para deposições PVD de nitreto de titânio
Beneficiário:Milton Sergio Fernandes de Lima
Linha de fomento: Bolsas no Exterior - Pesquisa
Processo FAPESP: 98/07319-0 - Aplicações de lasers no processamento de materiais
Beneficiário:Spero Penha Morato
Linha de fomento: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE