Ensaio de usinabilidade em liga inconel 625 por torneamento

Abstract

The machinability is an important factor in machining processes, but their evaluation is not simple, since it directly depends on many factors and variables, such as the pair tool / workpiece, the process and cutting parameters. This paper presents an evaluation of the machinability of Inconel 625 by the process of turning outer cylindrical. The nickel base superalloys such as Inconel case 625, are characterized as materials difficult to machine to be an alloy of high heat resistance and high mechanical strength with a fast hardening. This study aims to evaluate the machining of this material, simulating the condition of the royal court of Inconel 625 deposit. For this, the sample was subjected to testing tool life analyzed for four different speeds according to ISO 3685, analysis of the quality workpiece surface by measuring the roughness and lastly with a piezoelectric dynamometer, the force of the cutting process was measured at six different cutting conditions. For all tests the cutting tool used was TNMG 16 04 04-MF GC1125. It was concluded that the cutting speed to 40 m / min, the tool had the longest life, remaining next to 22 minutes. The lowest roughness was observed at the speed of 45 m / min, where the average value obtained was 1.15 micrometers. With the values of the cutting forces, the pressures were obtained for each specific cutting condition, with values between 4082 and 5204 kN/mm2.