TITANIUM SHEET WITH EXCELLENT FORMABILITY AND LUBRICITY, AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a titanium sheet having low friction coefficient, high Erichsen value and excellent formability and lubricity. SOLUTION: In this titanium sheet, the value of expression [(Cni-Cnr)×t×1000] consisting of the following three is made to 4 to 10: nitrogen concentration Cn...

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Hauptverfasser:	TAKAHASHI KAZUHIRO, HAYASHI TERUHIKO, AIZAWA MASAHITO, KIMURA KINICHI, TAMENARI JUNICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a titanium sheet having low friction coefficient, high Erichsen value and excellent formability and lubricity. SOLUTION: In this titanium sheet, the value of expression [(Cni-Cnr)×t×1000] consisting of the following three is made to 4 to 10: nitrogen concentration Cni (mass%) obtained by analysis without removing the surface of the product titanium sheet thickness as it is; nitrogen concentration Cnr (mass%) obtained by analysis after removing both surfaces of the sheet by ≥1 μm, respectively, by grinding; and sheet thickness t(mm). Simultaneously, the center line average height of roughness (Ra) of the sheet surface is made to 0.05 to 0.5 μm. As to its efficient manufacturing method, the average roughness of the sheet surface is controlled to a value within the above range by means of cold rolling or working, such as skin pass rolling and straightening, after heating and annealing and the cold rolled sheet is heated, after cleaning, at 750 to 835°C for 1 to 60 s in gaseous nitrogen to control surface nitriding so that the value of the expression becomes 4 to 10 and also to carry out annealing. COPYRIGHT: (C)2004,JPO&NCIPI