Nickel-base superalloy GH4169 is a heat-resistant alloy with excellent mechanical properties and corrosion resistance

which widely used in aerospace engineering and other fields. The residual stress caused by thermal – mechanical in cutting process has an important effect on the fatigue performance of the part. In this paper

the GH4169 turning experiments and Deform-3D simulation were carried on. The residual stress field is studied by the experimental cutting force and the simulative temperature-strain field. The results show that the influence of tool wear on the main cutting force and turning temperature is very significant. During the tool wear process

the main cutting force increases from 538N to 756N

and the shear zone temperature increases from 552℃ to 654℃ . The surface strain increases from 3.3 to 3.5; The increase in cutting force and temperature-strain caused by tool wear which result in surface residual tensile stress increase from 517MPa

242MPa increased to 860MPa and 442MPa in circumferential and feed direction

the peak residual compressive stress of the layer increase from -696MPa

-356MPa to -756MPa

-456MPa; the depth of residual stress layer increase from 72μm to 85μm.