Estudo da influencia do teor de niquel na usinabilidade de ligas Fe-Cr-Ni / Study of the nickel content influence in the machinability of Fe-Cr-Ni

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The aim of this work was to study the influence of nickel content in FeCrNi alloys on the coated cemented carbide tool life during the finish turning process. For this purpose 18%Cr-0,01%C-0,2%Si-0,4%Mn base composition and variable nickel content (0, 10, 20, 30, 40, 50 and 60 weight %) alloys were prepared. As the nickel content increased, the iron content decreased in the same proportion. Tests were carried out with coated cemented carbide inserts, M15 class with TiC/Al2O3/TiN coating. All alloys were machined on the same cutting conditions (vc = 230 m/min, ap = 0,6 mm and f = 0,1 mm/rev), in order to set nickel content as the only input variable. Results indicate that tool life decreases with the growth of nickel content, and the mainly tool wear mechanism is attrition. An exception was the material with 30% of nickel, that presented the same tool wear mechanism but showed out higher machinability, allowing longer tool life

ASSUNTO(S)

tool wear ligas de niquel fe-cr-ni alloys metais - usinabilidade stainless steels machinability aço inoxidavel ferramentas para cortar metais

ACESSO AO ARTIGO

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