Resumo

MATOS, JOSE et al. ABRASIVE WEAR RESISTANCE OF API 5L X65 STEEL COATED WITH NIOBIUM PLASMA THERMAL SPRAY AND BY INCONEL 625 WELDING. Dyna rev.fac.nac.minas [online]. 2012, vol.79, n.175, pp.97-103. ISSN 0012-7353.

The aim of this study was to evaluate the abrasive wear resistance of the API 5L X65 steel coated with niobium and Inconel 625 alloy. The niobium coating was obtained by thermal spray process with non-transferred arc plasma and the inconel 625 coating was obtained by shielded metal arc welding. The abrasion resistance was evaluated according to standard Petrobras N-2568, in a tribometer CETR and the coating roughness was determined using profilometry. The coating hardness was determined by Vickers microhardness. The coating morphologies were also characterized by scanning electron microscopy and optical microscopy. The high hardness of niobio coatings contributed to reducing the rate wear compared to the inconel 625 coating.

Palavras-chave : Wear; Inconel 625 coating; niobium coating.

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