Method of manufacturing a corrosion resistant steel component.

摘要

A non-alloy steel component is nitrocarburised at 550 DEG C to 720 DEG C for up to 4 hours in a nitriding gaseous atmosphere eg ammonia or ammonia and endothermic or exothermic gas. The component is then cooled polished or lapped to a surface roughness of not more than 0.2 micrometres Ra, reheated in air to oxidise and finally quenched. These techniques give a good corrosion resistance to the component.