Air Products and Chemicals, Inc.
Method And Apparatus For Controlling The Nitriding Potential Of A Nitriding, Nitro-Carburizing Or Carbonitriding Atmosphere

Abstract:

A method and an apparatus for nitriding metal articles, wherein the nitriding potential of the nitriding atmosphere is controlled as a function of the molecular weights of the inlet and outlet gases from the nitriding apparatus, as measured by molecular weight sensors located outside (external to) the furnace chamber.