Properties

The Nitrotec layer of the application has a positive influence on the properties as stated below.

  • Wear resistance
  • Surface hardness
  • Yield strength
  • Fatigue strength
  • Tribological characteristics
  • Corrosion resistance
  • Surface finish
  • Aesthetic finish
  • Dimensional control
  • Alternative to hard chromium plating
  • Weight reduction
  • Cost reduction

Toughest in wear resistance

Specific hardness profiles indicate the capability of Nitrotec treated components to resist indentation from point contact surface loading.

Surface hardness

The surface hardness as wel as the specific hardness profiles indicate the capability of Nitrotec treated components to resist indentation from point contact surface loading.

Strengthening

When rapidly cooled after Nitrotec treatment, significant strengthening of thin sections, as for example sheet metal, occurs. This results in an increase in both yield strength of the base material and its fatigue strength.

Bearing (tribological) characteristics

Because of the specific composition om the compound layer, Nitrotec treated surfaces may operate in contact with one another and other surfaces without the need to employ individual bearings or greasing.

Corrosion resistance

Nitrotec combined with an organic sealant retained in the micro porous layer, imparts corrosion resistance superior to that of electro plated components, and comparable to that of medium grades of stainless steels. A combination of Nitrotec finishes with a range of organic sealants give salt corrosion resistance with a minimum of 240 hours.

Surface finish

Nitrotec treatments, that are environmentally friendly and clean, ensure that good surface finishes can be maintained.

Aesthetic finish

Nitrotec treatment produces an aesthetically pleasing black/anthracite surface finish.

Dimensional control

Traditional hardening practices may give rise to distortion and poor dimensional control, because metallurgical phase changes when rapidly quenching from high treatment temperatures. During Nitrotec treatment these changes do not occur, therefore allowing the treatment of close-tolerance precision parts, especially thin section components.

Layer

The layer which is formed during Nitrotec consists of compound zone which is supported by a nitrogen-austenite layer. The oxide, so-called magnetite, is about 1 μm in thickness and can be increased up to 4 μm when applicable. Also the thickness of the compound layer is variable pending on the material and the application. Underneath the nitrogen-austenite, the so-called diffusion zone is created.

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