发明授权
US09222150B2 Process for making finished or semi-finished articles of silver alloy 有权
制造银合金成品或半成品的工艺

  • 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
  • 申请号: US12830612
    申请日: 2010-07-06
  • 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
Process for making finished or semi-finished articles of silver alloy
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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