Method of producing heat treatment atmosphere

An endothermic-base type heat treating furnace atmosphere is produced in an external generator by a partial oxidation between air and alcohol (e.g. ethanol). An alcohol-rich mixture is prepared and reacted at an elevated temperature to form a product gas comprising carbon monoxide, nitrogen, hydroge...

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Bibliographische Detailangaben
Hauptverfasser:	MAIN, JR., RAY F
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	An endothermic-base type heat treating furnace atmosphere is produced in an external generator by a partial oxidation between air and alcohol (e.g. ethanol). An alcohol-rich mixture is prepared and reacted at an elevated temperature to form a product gas comprising carbon monoxide, nitrogen, hydrogen, carbon dioxide, methane and water. The product gas is quickly cooled and any water that condenses is removed. The generator product gas is then introduced into a furnace within which it usually undergoes further reaction to provide a suitable nonoxidizing heat treating atmosphere. In one aspect of this invention, the generator gas is used for carburizing ferrous metal workpieces without additional increase of the carbon potential.