Improve surface roughness.
Correct the roundness, the ellipse can be ≤0.01mm.
Improve the surface hardness to eliminate stress deformation, and increase the hardness by HV≥4°.
There is a residual stress layer after processing to increase the fatigue strength by 30%.
Improve the quality of coordination, reduce wear and prolong the service life of parts, but the processing cost of parts is reduced.