1. Improve the surface roughness, and the roughness basically reaches RA≤0.08 microns;
2. Correct roundness, ellipticity can be ≤ 0.01 mm.
3. Improve surface hardness, eliminate stress deformation, and increase hardness by high pressure ≥ 4 °
4. There is a residual stress layer after processing, and the fatigue strength is increased by 30% .
5. Improve the matching quality, reduce wear, prolong the service life of parts, but reduce the processing cost of parts.
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