EP1650316A1 - Goldlegierung - Google Patents

Goldlegierung Download PDF

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Publication number
EP1650316A1
EP1650316A1 EP04405652A EP04405652A EP1650316A1 EP 1650316 A1 EP1650316 A1 EP 1650316A1 EP 04405652 A EP04405652 A EP 04405652A EP 04405652 A EP04405652 A EP 04405652A EP 1650316 A1 EP1650316 A1 EP 1650316A1
Authority
EP
European Patent Office
Prior art keywords
gold
copper
alloys
alloy
weight
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP04405652A
Other languages
English (en)
French (fr)
Inventor
Nathalie Guilbaud
Denis Vincent
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metalor Technologies SA
Original Assignee
Metalor Technologies SA
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
Application filed by Metalor Technologies SA filed Critical Metalor Technologies SA
Priority to EP04405652A priority Critical patent/EP1650316A1/de
Priority to EP05797014A priority patent/EP1815031A1/de
Priority to PCT/EP2005/055334 priority patent/WO2006042846A1/fr
Publication of EP1650316A1 publication Critical patent/EP1650316A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C22C5/02—Alloys based on gold

Definitions

  • the present invention relates to the field of alloys based on gold and copper.
  • Such alloys exist in various compositions (or caratages), and are used, for example, in jewelery and in the watch or dental industry.
  • the object of the present invention is to overcome this drawback by proposing a gold-copper alloy having a more stable disordered structure during the machining and thermal steps necessary for the shaping of mechanical parts.
  • the invention relates to an alloy based on gold and copper, characterized in that it is doped with an element selected from antimony and tin.
  • the table on page 4 shows the composition of the various gold and copper alloys that were studied during the development of the present invention, as well as the hardness values obtained after homogenization and rolling. Some of them contain, in addition, silver or platinum. In total, six alloys were tested, doped or not, with 0.2% antimony. The percentage of gold expressed by weight varies between 37.5% for 9-carat gold and 80% for the gold-copper binary alloy.
  • ingots of thickness 5mm were cast from gold and silver shot, copper plates and pieces of antimony.
  • the ingots were subsequently rolled to a thickness of 1 mm, and their Vickers hardness was measured after this second step. The measured values are reported in the last column of the table.
  • the rolling step has the effect, on the one hand, to increase the Vickers hardness and on the other hand to standardize the results between the different alloys and between respectively doped and undoped alloys.
  • the gold-copper binary alloy and the gold-platinum-copper tertiary alloy Two alloys have Vickers hardness values substantially higher than other alloys, and their doped alloys have a lower Vickers hardness than corresponding undoped alloys. This is explained in these alloys by the absence of silver, which has the effect of increasing the ductility in other alloys and masking the effect of doping after rolling.
  • the rolled ingots were cured by successive annealing of a duration of five minutes, at temperatures of between 100 ° C. and 280 ° C.
  • the Vickers hardness was measured after each annealing, and the values were reported on the various graphs 1 to 6, each graph representing the temperature behavior of the Vickers hardness of one of the six alloys studied as well as that of the alloy. corresponding doped with antimony.
  • Graphs 1 to 6 refer, in order, to the 18-carat red, 14-carat yellow, 14-carat red, 9-carat red, binary gold-copper and gold-copper-platinum alloys, whose compositions are shown in the table.
  • A refers to undoped alloys
  • B refers to doped alloys.
  • the Vickers hardness increases with the annealing temperature due to the easy reordering of the alloy structure.
  • the increase in hardness is low up to 150 ° C, then increases more significantly up to 280 ° C.
  • graphs 1 to 6 this trend is true, except for graph 4 representing the 9-carat red alloy, for which the hardness is maximum at 200 ° C, then decreases to 280 ° C.
  • doped and undoped alloys have a substantially parallel evolution, the doped alloy being almost always at a level of hardness lower than that of the undoped alloy. Only the 9-carat red alloy exhibits again a different behavior, the doped alloy being harder than the undoped alloy at all temperatures. This alloy is the only one of the alloys studied to have a percentage of gold lower than the percentage of copper, which could explain a behavior significantly different from the behavior of other alloys

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Dental Preparations (AREA)
EP04405652A 2004-10-20 2004-10-20 Goldlegierung Withdrawn EP1650316A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04405652A EP1650316A1 (de) 2004-10-20 2004-10-20 Goldlegierung
EP05797014A EP1815031A1 (de) 2004-10-20 2005-10-18 Goldlegierung
PCT/EP2005/055334 WO2006042846A1 (fr) 2004-10-20 2005-10-18 Alliage d'or

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405652A EP1650316A1 (de) 2004-10-20 2004-10-20 Goldlegierung

Publications (1)

Publication Number Publication Date
EP1650316A1 true EP1650316A1 (de) 2006-04-26

Family

ID=34932326

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04405652A Withdrawn EP1650316A1 (de) 2004-10-20 2004-10-20 Goldlegierung
EP05797014A Withdrawn EP1815031A1 (de) 2004-10-20 2005-10-18 Goldlegierung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP05797014A Withdrawn EP1815031A1 (de) 2004-10-20 2005-10-18 Goldlegierung

Country Status (2)

Country Link
EP (2) EP1650316A1 (de)
WO (1) WO2006042846A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3783124A1 (de) * 2019-08-23 2021-02-24 Omega SA Uhr, schmuck- oder juwelierartikel aus gold
WO2022033749A1 (de) * 2020-08-12 2022-02-17 Egf - Eduard G. Fidel Gmbh Schmuckkörper

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323492A1 (de) * 2001-03-23 2003-07-02 Citizen Watch Co. Ltd. Hartlötzusatzmetall

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380814A (en) * 1965-06-18 1968-04-30 Sel Rex Corp Electrolyte and method for coating articles with a gold-copper-antimony alloy and article thereof
DE3132143C2 (de) * 1981-08-14 1985-07-04 Degussa Ag, 6000 Frankfurt Edelmetallegierung zur Herstellung von mit keramischen Massen verblendbaren Kronen und Brücken
NL9001986A (nl) * 1990-09-10 1992-04-01 Elephant Edelmetaal Bv Dentaal porselein, werkwijze voor het vervaardigen van een tandheelkundige restauratie, dentaallegering.
JP3578831B2 (ja) * 1995-05-18 2004-10-20 株式会社徳力本店 宝飾用金合金
DE19958800A1 (de) * 1999-06-30 2001-01-04 Wieland Edelmetalle Weißgold-Schmucklegierung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323492A1 (de) * 2001-03-23 2003-07-02 Citizen Watch Co. Ltd. Hartlötzusatzmetall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3783124A1 (de) * 2019-08-23 2021-02-24 Omega SA Uhr, schmuck- oder juwelierartikel aus gold
US11441210B2 (en) 2019-08-23 2022-09-13 Omega Sa Timepiece or piece of jewellery or gemstone jewellery made of gold
WO2022033749A1 (de) * 2020-08-12 2022-02-17 Egf - Eduard G. Fidel Gmbh Schmuckkörper

Also Published As

Publication number Publication date
WO2006042846A1 (fr) 2006-04-27
EP1815031A1 (de) 2007-08-08

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