Process for making finished or semi-finished articles of silver alloy
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United States of America Patent
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Dec 29, 2015
Grant Date -
Oct 21, 2010
app pub date -
Jul 6, 2010
filing date -
Jun 2, 2004
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Abstract
A process for making a finished or semi-finished article of silver alloy, said process comprising the steps of providing a silver alloy containing silver in an amount of at least 77 wt %, copper and an amount of germanium that is preferably at least 0.5 wt % and is effective to reduce tarnishing and/or firestain, making or processing the finished or semi-finished article of the alloy by heating at least to an annealing temperature, gradually cooling the article; and reheating the article to effect precipitation hardening thereof. The avoidance of quenching reduces the risk of damage to the article.
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