Gold materials for accessories hardened with minor alloying comp

Details Gold materials for accessories hardened with minor alloying comp Gold materials for accessories hardened with minor alloying comp

1997-09-04

2000-09-26

Andrews, Melvyn

Metal treatment

Stock

Noble metal base

420507, C22C 502

Patent

active

061237868

ABSTRACT:
A gold material for accessories comprises a hardened gold alloy composed of pure gold having a purity of 99% or more and from 200 to 2000 ppm, relative to the total weight of the resulting gold alloy, of one or more alloying components selected from Ca, Be, Ge and B, and optionally from 10 to 500 ppm, relative to the same, of one or more other alloying components selected from Mg, Al, Si, Mn, Fe, Co, Ni, Cu, Pd, Ag, In, Sn, Sb, Pb and Bi and/or from 10 to 1000 ppm, relative to the same, of one or more other alloying components selected from rare earth elements including Y.

REFERENCES:
patent: 4080485 (1978-03-01), Bonkohara
patent: 4330329 (1982-05-01), Hayashi et al.
patent: 4775512 (1988-10-01), Fukui et al.
patent: 4938923 (1990-07-01), Kujiraoka et al.

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