COPPER ALLOY FOR ORNAMENT AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To produce a copper alloy contg. no nickel which is the main cause of metal allergies and having mechanical properties as metal for ornaments equal to or above those of nickel silver in the stock for metal-made ornaments which are directly contacted with skins, such as watches...

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Bibliographische Detailangaben
Hauptverfasser:	KURAMOTO SHIGERU, SHIMIZU AKIHISA, ITO HIDEHARU, KATAOKA TETSUJI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To produce a copper alloy contg. no nickel which is the main cause of metal allergies and having mechanical properties as metal for ornaments equal to or above those of nickel silver in the stock for metal-made ornaments which are directly contacted with skins, such as watches and spectacle frames. SOLUTION: This copper allay contains, by weight, 2.0 to 6.0%. Al, 7.0 to 20.0%. Mn, 0.5 to 2.5% Fe and 3.0 to 15.0% Zn, is furthermore added with one or two kinds of Si and Ti by 0.1 to 1.5%, and the balance copper with inevitable impurities. The copper allay is subjected to hot plastic working and is moreover subjected to cold plastic working at 10 to 60% working ratio.