The influence rules of grinding parameters on the surface topographic characters

including surface roughness

surface topography

surface microhardness and surface residual stresses of the surface integrity

were studied to optimize the grinding parameters when grinding the GH4169 nickel-based superalloy by using single crystal corundum grinding wheel. The wheel speed was selected as 15

20

25m/s

the grinding depth selected as 50

100

150μm

and the workpiece speed selected as 5

10

15m/min. The results show that

the surface roughness is most sensitive to the workpiece speed

the surface microhardness and the surface residual stresses are most sensitive to the wheel speed. And the influence rules of grinding parameters on the surface morphology

the gradient of microhardness

microstructure and the gradient of residual stress were studied

revealing the formation rules of metamorphic layer of the surface integrity. The plastic deformation layer is in range of 5～10μm

the depth of the microhardness change is 80～100μm

the residual stress affected layer thickness is 80～200μm

thus providing relevant experimental data base for research of the surface integrity control in grinding nickel-based superalloy.