What is the difference between nitriding and nitrocarburizing?

Nitriding is used on ferrous, titanium, aluminum, and molybdenum alloys, and most commonly on low-carbon, low-alloy steels. Nitrocarburizing is only used on ferrous alloys. They improve surface properties of metal components and tools such as scuff and corrosion resistance, and increase the fatigue strength.

What is the Qpq process?

Quench-Polish-Quench (QPQ) Process QPQ is prescribed when a smooth surface finish and maximum corrosion protection are required. For many applications, this finishing process provides a surface condition that protects against corrosion and wear superior than hard chrome or nickel plating.

What is salt bath nitrocarburizing?

Fluidised bed/salt bath nitriding/nitrocarburising is a process used to improve the wear resistance, fatigue strength and, when combined with post oxidation through oxidative cooling, improved corrosion resistance on products made from steel, cast iron and sintered iron.

What is gas nitrocarburizing?

Gas nitriding is a thermo-chemical process of steel surface hardening. During gas nitriding, steel is heated to a temperature between 500 °C and 580 °C in the ammonia atmosphere. There is a layer of nitrides formed on the surface. By adding carbon to the workpiece surface, the process of nitrocarburizing is performed.

Does nitrided steel rust?

The corrosion resistance of the nitrided layer is excellent in many environments. It is possible to induce both nitrogen and carbon atoms into the metallic surface simultaneously.

Which gas is used in nitriding?

ammonia
Gas nitriding uses ammonia or ammonia–hydrogen mixtures to enhance the nitrogen activity. Ammonia easily dissociates into gaseous nitrogen and hydrogen according to the chemical equilibrium.

What is Melonite QPQ?

Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer or Melonite.

Is Melonite and nitride the same?

Nitride is a treatment to the barrels steel that hardens the steel and significantly increases corrosion and wear resistance. This is usually done in a process called Quench polish quench (QPQ). Melonite is a specific version of Nitride but for the most part Melonite and Nitride are the same.

What is SBN coating?

Salt bath nitrocarburizing (SBN) is a popular alternative to hard chromium and physical vapor deposition (PVD). More effective than hard chromium, sBN is extremely economical, with an array of well-documented benefits. Cost-EffECtivE HigH PErformanCE Coating. enhanced wear resistance. increased corrosion resistance.

What is Tufftride heat treatment?

The Tufftride® process of Durferrit is a surface heat treatment Salt Bath Nitrocarburising treatment carried out at around 580°C for relatively short times (30 minutes to 3 hours) which produces a hard wear resistant surface on many steels.

What is Tenifer treatment?

Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath.