DE1533964

1,189,046. Annealing furnaces; carbonitriding. DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT. March 19, 1968 [March 23, 1967], No. 13176/68. Headings C7N and C7U. [Also in Division F4] A furnace for bright annealing or gas carburizing or carbonitriding steel (alloy) workpieces has its inner ceramic claddi...

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Hauptverfasser:	WINTER, KARL-HEINZ, 6451 DOERNIGHEIM, KRACH, OTTWIN, 6451 WOLFGANG
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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Zusammenfassung:	1,189,046. Annealing furnaces; carbonitriding. DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT. March 19, 1968 [March 23, 1967], No. 13176/68. Headings C7N and C7U. [Also in Division F4] A furnace for bright annealing or gas carburizing or carbonitriding steel (alloy) workpieces has its inner ceramic cladding coated with a catalyst material, e.g. NiO, Pt or Pd, so that the inert or carburizing gas is catalytically produced in the furnace itself direct from combustible gas e.g. butane or propane and air introduced into the furnace. For carbonitriding, ammonia may be simultaneously introduced.