Surface treatment of metals

Details Surface treatment of metals Surface treatment of metals

1983-05-26

1985-10-15

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 203, C23C 1100

Patent

active

045472289

ABSTRACT:
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.

REFERENCES:
patent: 3197346 (1965-07-01), Munday
patent: 3658602 (1972-04-01), Pomey
patent: 3663315 (1972-05-01), Hoffman et al.
patent: 4236942 (1980-12-01), Rudd et al.
patent: 4237184 (1980-12-01), Gonseth

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