The invention describes a method of heat-treating an article, which includes a first step of heating the article to a of 400?C to 500?C at a pressure of 1 to 3 millibar in an atmosphere comprising hydrogen for a period of 0.1 to 50 hours to produce a hot article, a second step of heating the hot article at a of 400?...

An embodiment of the invention describes a method of treating an article to improve its corrosion resistance. The method includes the step of nitriding the article in a cyanide-free nitriding bath to obtain a nitrided article, heating the nitrided article in an atmosphere having nitrogen and carbon-carburizing to ob...