Automobile Series
Down
Gearbox System
Material
1144, SUJ2, 60#, 40Cr, 45#, 12L14, SUS303, CuZn39Pb3, 1215ms, 16MnCrS5, 30CrNiMo8, Al6082-T6, 20#, TL4227
Outer diameter tolerance
0.005mm
Inner hole tolerance
0.011mm
Coaxiality
0.01mm
Perpendicularity
0.03mm
Surface roughness
Rz1.6
Runout
0.003mm
Roundness
0.001mm
Cylindricity
0.003mm, 0.005mm
(after plasma nitriding)
(after plasma nitriding)
Heat treatment
overall quenching, carburizing, high-frequency quenching, plasma Nitrocarburizing + oxidation, gas nitriding + oxidation
Surface treatment
zinc plating, phosphating, anodic oxidation
Salt spray test
250//360/720 hours without red rust
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