Nitriding Heat Treatment

What is Nitriding Heat Treatment?

Nitriding heat treatment is a thermochemical process in which nitrogen penetrates the metal surface to increase surface hardness and improve wear resistance. Nitrogen atoms enter the metal's crystal structure, forming a hard and wear-resistant layer. This process is carried out at low temperatures, minimizing part deformation.

How is Nitriding Heat Treatment Applied?

  • Preparation Stage: The metal surface is cleaned and made suitable for nitriding.
  • Nitriding Stage:
    • Gas Nitriding: Nitrogen is introduced by dissociating ammonia (NH₃) gas at high temperatures (500-600°C) on the metal surface.
    • Plasma (Ion) Nitriding: Electrical plasma is created to allow nitrogen ions to penetrate the metal surface.
    • Salt Bath Nitriding: The metal is saturated with nitrogen in molten salt baths.
  • Cooling and Final Checks: After nitriding is completed, controlled cooling is applied, and the material gains its hardness.

Advantages of Nitriding

  • Increases surface hardness, significantly improving wear resistance.
  • Greatly improves fatigue resistance.
  • Maintains dimensional stability due to the low temperature application.
  • Increases resistance to corrosion.

Materials Used in Nitriding

Alloy steels
Stainless steels
Titanium and titanium alloys
Cast irons
Aluminum alloys
Nitriding Heat Treatment

Main Industries

Nitriding heat treatment is a critical process for increasing hardness, wear resistance, and corrosion resistance. For this reason, it is widely preferred for durable and long-lasting mechanical components.

  • Automotive: Camshafts, gears, crankshafts, engine components.
  • Aerospace: Parts requiring high durability and lightweight materials.
  • Machine Tools: Wear-resistant tool and machine components.
  • Defense Industry: Military equipment resistant to harsh conditions.
  • Energy and Petrochemical: Corrosion-resistant pipes and valve systems.

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