发明授权
- 专利标题: Process for making finished or semi-finished articles of silver alloy
- 专利标题(中): 制造银合金成品或半成品的工艺
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申请号: US12830612申请日: 2010-07-06
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公开(公告)号: US09222150B2公开(公告)日: 2015-12-29
- 发明人: Peter Gamon Johns
- 申请人: Peter Gamon Johns
- 代理机构: Withers Bergman LLP
- 优先权: GB0412256.0 20040602; GB0421172.8 20040923; GB0510243.9 20050520; GB0523002.4 20051111
- 主分类号: C22F1/14
- IPC分类号: C22F1/14 ; C22C5/06 ; C22C5/08
摘要:
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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