PRODUCTION OF COATED ALUMINUM ALLOY

PURPOSE:To develop the title coated Al alloy having excellent wear resistance without deteriorating the strength of an Al alloy by preheating the Al alloy at a specified temp. coating the surface with a hard nonmetal compd., etc., in a solution-annealing temp. range, immediately quenching, and then...

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Hauptverfasser:	TANAKA KUNIO, SUNAMI HIDEHACHIRO, MUGITA MIKIO
Format:	Patent
Sprache:	eng
Schlagworte:	CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS 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 FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To develop the title coated Al alloy having excellent wear resistance without deteriorating the strength of an Al alloy by preheating the Al alloy at a specified temp. coating the surface with a hard nonmetal compd., etc., in a solution-annealing temp. range, immediately quenching, and then age- hardening the alloy. CONSTITUTION:An Al alloy part 7 to be treated in a vacuum vessel 4 is preheated by a heater 5 to 150 deg.C or to a solution-annealing temp. Gaseous N2 is supplied from a gas tube 6 into the vessel 4 to obtain about 0.02-0.005Torr pressure, the Al alloy part 7 is heated to a solution-annealing temp. range, the electric potential of a water-cooled crucible 8 made of copper and contg. metallic Ti is made positive, the potential of a tube 9 made of Ta is made negative, gaseous Ar is injected from the tube 9 to generate a glow discharge, hence the metallic Ti is ionized, the Ti ion is allowed to collide with the Al alloy part 7 along with the gaseous N2 ion, and a film of TiN is formed. The part is immediately discharged from the vessel 4, cooled with water, and age-hardened. By this method, an Al alloy with a coating having excellent wear resistance is produced.