FLUIDIZED BED PROCESS FOR BORON-NICKELIZING OF STEEL OBJECTS

FIELD: metal coatings. SUBSTANCE: process involves preliminarily saturation of nickel at 350-500 C during 5 to 30 min and saturation with boron at 600 to 950 C. The former is conducted in composition containing, wt %: nickel oxide 0.02-0.5, boron carbide 5-35, ammonium chloride 0.005-0.2, sodium tet...

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Bibliographische Detailangaben
Hauptverfasser:	GRACHEV S.V, KOLPAKOV A.S, BUSHMANOV P.V
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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	FIELD: metal coatings. SUBSTANCE: process involves preliminarily saturation of nickel at 350-500 C during 5 to 30 min and saturation with boron at 600 to 950 C. The former is conducted in composition containing, wt %: nickel oxide 0.02-0.5, boron carbide 5-35, ammonium chloride 0.005-0.2, sodium tetrafluoroborate 0.01-0.1, and corundum - the balance. EFFECT: enabled preparation of high-quality boron-nickel layers 90-120 mcm thick with microhardness 14000 MPa. 1 tbl