A novel Oxygen free Ferritic Nitro Carburizing process

ABSTRACT

Anti-wear, anti-galling and scratch resistance are well-known properties associated with FNC processes. Expanite has a series of advanced gaseous processes for surface hardening of Stainless steels, as well as processes for surface hardening of Titanium alloys. The marked demand for expansion of the scope of processes in equipment available, has led to the development of tailored FNC process for application to low alloyed steel, and alloyed steel. The process had to be oxygen free, as the equipment is also applied in expanded austenite processes for corrosion resistant alloys. Utilizing our Mass Flow Controller equipped furnaces the tight control of the parameters is possible resulting in high repeatability and a consistent compound layer formation.

The process has been applied to a number of different alloys, showing good results for unalloyed steels and steels in quenched and tempered condition.

Keywords: Ferritic Nitro Carburising, FNC, compound layer, oxygen free, anti-wear, anti-galling, anti-corrosion, heat treatment, surface hardening.