Estimating Machinability Factors in Turning of Inconel 625 under different lubricating conditions using 3D DEFORM FE Analysis

Abstract

This paper contributes to the investigation of machinability factors in turning the nickel- based Inconel 625 superalloy with PVD coated TiAlN tungsten carbide cutting insert. The machinability parameters – cutting force (Fc), tool wear rate (𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑⁄), and tool temperature (T) are visualized graphically using the FE model based Deform 3D software interface. The paper discusses the application of boundary conditions, and meshing used for simulating results. The results of the dry turning simulation showed a maximum level of cutting force, tool-tip temperature, and tool wear rate in comparison with conventional MQL and NMQL conditions. The NMQL conditions showed a reduction in cutting force with the use of h-BN NMQL environment compared with dry and conventional MQL machining by 41% and 27%, respectively. Further, the comparison of cutting tool temperature for three simulated conditions showed a clear-cut reduction of temperature in NMQL conditions in comparison with dry and conventional MQL, by 44% and 30%, respectively.

Keywords

• cutting force
• deform 3d
• inconel 625
• machinability
• tool temperature
• tool wear rate