发明名称 |
Process for Making Finished or Semi-Finished Articles of Silver Alloy Comprising Copper and Germanium |
摘要 |
A process is provided for making a finished or semi-finished article of silver alloy, said process comprising steps of: providing a silver alloy containing silver in an amount of at least 77 wt %, copper and an amount of germanium that is 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; and gradually air cooling the article from the temperature at which it is made or processed to develop a Vickers hardness of more than 70.
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申请公布号 |
US2007251610(A1) |
申请公布日期 |
2007.11.01 |
申请号 |
US20050628260 |
申请日期 |
2005.05.27 |
申请人 |
MIDDLESEX SILVER CO. LIMITED MIDDLESEX UNIVERSITY |
发明人 |
JOHNS PETER G. |
分类号 |
C22F1/14;B23K35/30;C22C5/08 |
主分类号 |
C22F1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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