Method for detecting turning quality of corroded surface of GH4169 disc part

The invention provides a method for detecting the turning quality of a corrosion surface of a GH4169 disc part. The method comprises the following steps: S1, horizontally placing a workpiece; s2, vertically placing a magnifying lens on a to-be-observed surface of the workpiece; s3, adjusting the magnifying lens until the to-be-observed surface is clearly observed; s4, enabling the scale marks with the numbers on the magnifying lens to be perpendicular to the knife patterns of the to-be-observed surface, and placing the scale marks without the numbers on the wave troughs of the knife patterns of the to-be-observed surface; s5, observing the to-be-observed surface through the shooting device; s6, detecting to-be-observed surfaces at different positions of the workpiece, and detecting 1-4 positions of each to-be-observed surface; s7, irradiating the to-be-observed surface through the light source, enabling the light source direction and the to-be-observed surface to form different angles, and observing the color