Boron is sent to the part surface as an interstitial atom. It is used in many machine parts, especially in mining.
The iron oxide layer formed on the material surface increases corrosion resistance.
It is done by diffusing nitrogen to the surface along with carbon. The process temperature is higher than nitriding.
While the carbon atoms sent to the surface harden the surface, the core remains soft and tough.
Final treatment, the hard layer formed on the surface contributes to wear and fatigue resistance.
