G. Totten, D. T. De Macedo, L. De Brito Cruvinel, Portland State University, Portland, OR; L. C. Casteletti, A. Lombardi Neto, Escola de Engenharia de São Carlos –USP-São Carlos –SP-Brazil, Sao Carlos, SP, Brazil
The 7075 Aluminum alloys are used in aeronautical industry, however, its corrosion and/or wear resistances are relatively low. The performance of components that work in severe conditions can be optimized by the coating deposition by thermal spray, that consists in a process of simple production and it does not spoil the characteristics of the material base. Amongst available coatings, the cobalt-base superalloys, more known as Stellite, present good performance against wear and to the corrosion, as well as stainless steel AISI 420 with addition of Corodur 600. In the present work, two types of coatings obtained by thermal spray processes LVOF and HVOF on 7075-T3 aluminum alloy had been produced. The deposited layers did not deteriorate the substrate. The layer of Stellite presented the highest levels of hardness and the best performance in microabrasive wear test.
