An experimental investigation into the role of sintering temperature on the metal removal rate of titanium powder metallurgy products through Taguchi method

Abstract

The present work is undertaken to investigate and characterize the machining characteristics (such as metal removal rate, etc) of uni-axially pressed titanium sintered powder metallurgy components. Powder is uni-axially pressed at designated pressure of 840 MPa to form cylindrical samples and the green compacts are sintered at 0.001 mbar for about 4 h with sintering temperature varying from 1350°C to 1450°C. Machining experiments are conducted at different parameters in a CNC operated wire-cut EDM. The metal removal rate (MRR) of the machined surface was measured critically. The influence of pulse-on time, pulse-off time and sintering temperature on the MRR of the sintered preforms has been investigated thoroughly. The maximum MRR was achieved at 10 μs of pulse-on time, 11 μs of pulse-off time and sintering temperature of 1450°C.