Gold alloy for black coloring, processed article of black colore

Alloys or metallic compositions – Gold base

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420508, 420509, 420510, 420512, C22C 500

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051397390

ABSTRACT:
A gold alloy for black coloring comprising gold and at least one coloring metallic element selected from the group consisting of Cu, Fe, Co, and Ti, a gold alloy for black coloring having the composition described above and further comprising at least one alloying element selected from the group consisting of Pt, Pd, Rh, Ir, Ru, Os, Ag, and Ni; a method for the production of a processed article of gold alloy possessing a black surface layer by the steps of shaping the gold alloy mentioned above, heat-treating the shaped gold alloy, and cooling; and processed article of gold alloy obtained by the method.

REFERENCES:
patent: 3189482 (1965-06-01), Bajars et al.
McDonald et al., Gold Bulletin, vol. 11, (Jul. 1978) 66.
Ott et al., Gold Bull. 18 (1985) 140.
Susz et al., Gold Bull. 13 (1980) 15.
MacCormack et al., Gold Bull. 14 (1981) 19.
German et al., Gold Bull., vol. 13 (1980) 113.

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