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.
Internal
Cylindrical Gear
Rack Fully Loaded with Gears
Applications: bevel gears, ring gears, and spline gears and many more
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.
