Investigation on the thermal-mechanical coupling effect on wear mechanism of high-speed cutting nickel-based superalloy GH4169 with cermet cutting tools

Abstract

Nickel-based superalloys owes strong high temperature strength and corrosion resistance, and are widely used in aerospace and other fields. Machining of nickel-based superalloy is a typical thermal-mechanical coupling process. A prediction model of cutting force and cutting temperature was established for a orthogonal cutting, and the coupling stress of the cutting force and cutting heat was calculated. The orthogonal cutting experiment of GH4169 was conducted with cermet cutting tool. The cutting force and cutting temperature of prediction model was verified. And the distribution of stress on the rack face and wear of cutting tool were analyzed under different cutting parameters. The wear of cutting tool in the cutting process was mainly the crater wear on the rake face. The wear mechanism of the cutting tool and the wear amount of the crater on the rake face were analyzed based on thermal-mechanical coupling. The research results can provide a theoretical basis for optimizing the design and manufacture of cutting tools and improving the wear resistance of cutting tools.