Levantamento da curva de vida de ferramenta de corte na usinagem por torneamento da liga de inconel 625

Abstract

The Inconel is an alloy with high nickel in its composition. This alloy has very particular characteristics such as high corrosion resistance and very high hardness. This makes this material have an important role in the industrial environment, especially in the petrochemical, chemical and marine industries. However, there is great difficulty on the machinability of this alloy, the cutting tools have very fast wear in machining time. The objective of this project was to raise the tool life curve of a carbide tool when machining by turning an Inconel 625 alloy. For this, tests were conducted with this material at different cutting speeds using a coated carbide tool. The methodology used for the tests the one proposed by ISO 3685. With the curve plotted, it was possible to assess the feasibility of machining of Inconel 625 alloy in the given velocity field. The machining of Inconel 625 alloy under the adopted conditions, proved to be impractical for speeds above 80 m/min. Once the tool life is less than 2 minutes for these speeds, minimum time recommended by ISO 3685 standard. The main wear mechanisms should have been the abrasion and adhesion due to the behavior of the wear evolution observed in the different cutting speeds. Due to evidence of the abrasion wear mechanism, the most suitable cutting tool would be a ceramic one, once Keywords: Tool life curve, Inconel 625. this toll has a low fiction coefficient.