T20 coupling
Classification：
Coupling
key word:
T20 coupling
After the serpentine spring is tempered at medium temperature, the compressive stress generated by carbonitriding and the quenching compressive stress are mostly eliminated. At this time, shot peening can improve the surface hardness, eliminate the surface defects, offset the tensile stress generated by the concave surface when the spring is working, and further improve the fatigue limit
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