How does nitriding increase hardness?

Nitrogen ions bombard the part and form active nitrogen that reacts with surface and diffuses nitrogen into the steel. The plasma-glow discharge surrounds the load and it can be seen through the port window. The processes boost the surface hardness of treated parts.

When nitriding how hard a hardness can be expected?

Nitriding creates a component that has the following properties: High surface hardness (typically > 67 HRC)

Why hardening is not required after nitriding?

Since nitriding does not require quenching, and due its low temperature, generally between 500°C and 580°C, this surface hardening process produces components with much less distortion than carburising. Due to this, nitriding can be performed on finished components.

What is nitriding hardening?

Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface. These processes are most commonly used on low-alloy steels. They are also used on titanium, aluminium and molybdenum.

Does nitriding add thickness?

During nitriding the volume of the component increases by 3% of the layer thickness.

How do you measure nitriding hardness?

The test method to be used is Vickers in the low-load range. The nitriding hardness depth is derived from the curve representing the hardness over distance from the surface by measuring the distance from the surface to the calculated hardness limit.

What is the difference between hardening and nitriding?

Nitriding can be done at lower temperatures than carburizing. The diffusion of nitrogen gas normally occurs at low temperatures, and hardening occurs without quenching. Only the surface is hardened, the core remains the same. When a steel has undergone Nitriding process, it has excellent wear resistance.

What is hardness profile?

The required hardness profile and resulting gear strength and residual stress distribution are basically determined by the type of gear material (steel or cast iron), its prior microstructure and the desired gear performance characteristics.