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齿轮工业
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Gear Industry
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Gears are subjected not only to
wear but also to cyclical dynamic loads, calling for a sufficient bending and
contact fatigue resistance. Surface treatments like the Nitreg® gas nitriding
modify physical properties of the part surface to improve the performance
without altering the properties of the core. Insignificant distortion taking
place during nitriding helps produce quieter, longer lasting gears.
Applications: bevel gears, ring gears, and spline gears
Nitriding properties required: wear resistance, fatigue strength,
corrosion resistance, surface roughness, and distortion.
Case study
Wear Resistance
Tests
were conducted to compare the wear resistance of carburized and nitrided layers.
In one case 20MnCr5 steel was used on account of its low carbon content, which
allows it to be carburized as well as nitrided.
The results prove that the total wear depth is smaller for the nitrided
surface than for the carburized one.
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