Procedyne Corporation

Carol A Girrell

Mario A Fronzoni

Robert Staffin

Joseph E Japka

This application discloses a method and apparatus for conducting various metal treatment processes including nitriding, carbonitriding, nitrocarburizing, surface activation, and selective oxidation in any desired sequence in the same fluidized bed furnace. The apparatus comprises a fluidized bed furnace having a humidifier system including a humidifier and superheater and the method involves exposing a metal workpiece sequentially to at least two separate metal treatment atmospheres in a fluidized bed furnace.

Fluidized bed apparatus for treating metals

This application disclosed a method and apparatus for conducting various metal treatment processes including nitriding, carbonitriding, nitrocarburizing, surface activation, and selective oxidation in any desired sequence in the same fluidized bed furnace. The apparatus comprises a fluidized bed furnace having a humidifier system including a humidifier and superheater and the method involves exposing a metal workpiece sequentially to at least two separate metal treatment atmospheres in a fluidized bed furnace.

Surface treatment of metals

The present invention involves an apparatus and method for heat treating metal workpieces in chemically controlled environments produced by decomposition of an atmosphere precursor, e.g. methanol or ethyl acetate, introduced to a heated fluidized bed retort as a vapor.

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North Brunswick, NJ, United States of America

Carol A Girrell