PT1751322E - Process for making finished or semi-finished articles of silver alloy comprising copper and germanium - Google Patents

Process for making finished or semi-finished articles of silver alloy comprising copper and germanium Download PDF

Info

Publication number
PT1751322E
PT1751322E PT05744101T PT05744101T PT1751322E PT 1751322 E PT1751322 E PT 1751322E PT 05744101 T PT05744101 T PT 05744101T PT 05744101 T PT05744101 T PT 05744101T PT 1751322 E PT1751322 E PT 1751322E
Authority
PT
Portugal
Prior art keywords
finished
semi
germanium
copper
silver alloy
Prior art date
Application number
PT05744101T
Other languages
Portuguese (pt)
Inventor
Peter Gamon Johns
Original Assignee
Middlesex Silver Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0412256A external-priority patent/GB2414739B/en
Application filed by Middlesex Silver Co Ltd filed Critical Middlesex Silver Co Ltd
Publication of PT1751322E publication Critical patent/PT1751322E/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C22C5/08—Alloys based on silver with copper as the next major constituent

Abstract

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.
PT05744101T 2004-06-02 2005-05-27 Process for making finished or semi-finished articles of silver alloy comprising copper and germanium PT1751322E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0412256A GB2414739B (en) 2004-06-02 2004-06-02 Process for making finished or semi-finished articles of silver alloy
GB0421172A GB0421172D0 (en) 2004-06-02 2004-09-23 Process for making finished or semi-finished articles of silver alloy

Publications (1)

Publication Number Publication Date
PT1751322E true PT1751322E (en) 2009-01-12

Family

ID=34970034

Family Applications (1)

Application Number Title Priority Date Filing Date
PT05744101T PT1751322E (en) 2004-06-02 2005-05-27 Process for making finished or semi-finished articles of silver alloy comprising copper and germanium

Country Status (11)

Country Link
US (1) US20070251610A1 (en)
EP (1) EP1751322B1 (en)
JP (1) JP2008501857A (en)
AT (1) ATE409754T1 (en)
AU (1) AU2005250225A1 (en)
CA (1) CA2567033A1 (en)
DE (1) DE602005010072D1 (en)
ES (1) ES2318490T3 (en)
MX (1) MXPA06013685A (en)
PT (1) PT1751322E (en)
WO (1) WO2005118903A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9222150B2 (en) 2004-06-02 2015-12-29 Peter Gamon Johns Process for making finished or semi-finished articles of silver alloy
GB2428045A (en) * 2005-07-07 2007-01-17 Middlesex Silver Co Ltd Silver-copper-germanium alloy
EP1888797A1 (en) * 2005-05-20 2008-02-20 Middlesex Silver Co. Limited Silver-copper-germanium alloy manufacturing
US9194024B1 (en) 2010-05-17 2015-11-24 Stuller, Inc. Jewelry article of white precious metals and methods for making the same
US9217190B2 (en) * 2011-09-01 2015-12-22 Stuller, Inc. Sterling silver alloy and articles made from same
GB201117877D0 (en) * 2011-10-17 2011-11-30 Johnson Matthey Plc Silver alloy
RU2502816C1 (en) * 2012-12-18 2013-12-27 Юлия Алексеевна Щепочкина Silver-base alloy
RU2525975C1 (en) * 2013-08-13 2014-08-20 Юлия Алексеевна Щепочкина Silver-based alloy
WO2020109985A1 (en) * 2018-11-26 2020-06-04 Majid Khan Method for preparing an alloy of silver and copper for articles
WO2021221575A1 (en) * 2020-04-28 2021-11-04 Odak Sanat Hobi Ve Kraft Sanayi Dis Ticaret Limited Sirketi Silver clays suitable for production of tarnish resistant jewelry

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124380A (en) * 1977-06-24 1978-11-07 Youdelis William V Silver-copper-germanium alloys having high oxidation resistant melts
US4392289A (en) * 1981-06-01 1983-07-12 Charles Hoffert Of America, Inc. Manufacture of jewelry by casting with preset gems
US4810308A (en) * 1987-04-13 1989-03-07 Leach & Garner Company Silver alloys of exceptional and reversible hardness
FR2675817B1 (en) * 1991-04-29 1993-08-20 Metaleurop Rech NEW TERNARY ALLOY BASED ON SILVER.
DE4323227C1 (en) * 1993-07-12 1994-07-28 Degussa Cadmium-free silver alloy used as solder at temps. below 630 deg.C.
US6726877B1 (en) * 1993-11-15 2004-04-27 Anthony Phillip Eccles Silver alloy compositions
US6168071B1 (en) * 1994-11-17 2001-01-02 Peter Gamon Johns Method for joining materials together by a diffusion process using silver/germanium alloys and a silver/germanium alloy for use in the method
GB0112623D0 (en) * 2001-05-23 2001-07-18 Johns Peter G Method of producing silver-copper alloys

Also Published As

Publication number Publication date
EP1751322B1 (en) 2008-10-01
ES2318490T3 (en) 2009-05-01
JP2008501857A (en) 2008-01-24
ATE409754T1 (en) 2008-10-15
MXPA06013685A (en) 2007-02-13
US20070251610A1 (en) 2007-11-01
EP1751322A1 (en) 2007-02-14
WO2005118903A1 (en) 2005-12-15
DE602005010072D1 (en) 2008-11-13
CA2567033A1 (en) 2005-12-15
AU2005250225A1 (en) 2005-12-15

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