EP0405044B1 - Alliage d'or - Google Patents

Alliage d'or Download PDF

Info

Publication number
EP0405044B1
EP0405044B1 EP89810518A EP89810518A EP0405044B1 EP 0405044 B1 EP0405044 B1 EP 0405044B1 EP 89810518 A EP89810518 A EP 89810518A EP 89810518 A EP89810518 A EP 89810518A EP 0405044 B1 EP0405044 B1 EP 0405044B1
Authority
EP
European Patent Office
Prior art keywords
alloy
gold
temperature
furnace
gold alloy
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.)
Expired - Lifetime
Application number
EP89810518A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0405044A1 (fr
Inventor
Ludwig Muller
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.)
Muller Ludwig SA
Original Assignee
Muller Ludwig 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 Muller Ludwig SA filed Critical Muller Ludwig SA
Publication of EP0405044A1 publication Critical patent/EP0405044A1/fr
Application granted granted Critical
Publication of EP0405044B1 publication Critical patent/EP0405044B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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

Definitions

  • This invention is in the field of metallurgy and relates more particularly to a gold-based alloy.
  • alloys can be used, one of the components of which gives a predominant color to the whole.
  • copper is added to the gold to obtain a red gold alloy or palladium to obtain a gray gold alloy.
  • gold is added to the gold to obtain a red gold alloy or palladium to obtain a gray gold alloy.
  • gold is added to the gold to obtain a red gold alloy or palladium to obtain a gray gold alloy.
  • gold is distinguished by its blue color due to the oxidation of iron, as mentioned in American patent 4,820,487.
  • the subject of the invention is a gold alloy characterized in that it comprises the following elements: At 74.4 to 94.5% Fe 5 to 25% Or 0.5 to 0.6% where the contents are expressed as a percentage by weight relative to the total weight of the alloy and where the sum of said elements and impurities constitutes 100% of the total weight of the alloy.
  • the contents are more precisely the following: At 85% Fe 14.4% Or 0.6%
  • the contents are: At 75% Fe 24.4% Or 0.6%
  • the invention also extends to a process for treating gold objects made from the claimed alloy, characterized in that the gold object is heated, in an oven brought to a temperature between 450 and 600 ° C, for a predetermined period, under a normal atmosphere, then cooled to room temperature after removal from the oven to obtain a surface bluing due to the oxidation of non-precious elements contained in the alloy.
  • the duration of the heat treatment depends on the one hand on external factors such as degree of humidity or ambient temperature and on the other hand on the size of the objects. It will be longer for large pieces (watch boxes or jewelry for example) than for small pieces (elements of rings, bracelets or clips).
  • the duration of the heat treatment also depends on the temperature of the oven and is shorter when the temperature of the oven is higher.
  • the blueing of an object produced with the first variant of 20-carat alloy is more pronounced than that of an object produced with the second variant of 18-carat alloy, which tends to blue-green.
  • the invention further extends to the use in jewelry of an alloy characterized by the assembly of parts having different colorings making it possible to obtain a decorative effect.
  • the alloy intended to be treated in the oven to obtain a surface coloring can be obtained from a primary alloy.
  • a primary alloy For example, by melting 80% 24-carat fine gold with 20% pre-alloy, the latter must have the following weight contents: At 25% Fe 72% Or 3% to make the first preferred final alloy mentioned above.
  • the weight of the primary alloy is X% of the final alloy obtained by mixing X% of the primary alloy and (100 - X)% of fine gold
  • composition of the primary alloy will be given by the formulas: At [(74.4 to 94.5) - (100-X)] x 100 / X% Fe [5 to 25] x 100 / X% Or [0.5 to 0.6] x 100 / X%
  • the alloy obtained has a melting point of the order of 1000 ° to 1100 °.
  • the parts produced can be assembled by brazing, using conventional brazing alloys, with the usual additions for obtain a range of solders usable at decreasing temperatures from a temperature of about 100 ° lower than the melting temperature of the alloy.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Adornments (AREA)
  • Materials For Medical Uses (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Powder Metallurgy (AREA)
EP89810518A 1989-06-27 1989-07-10 Alliage d'or Expired - Lifetime EP0405044B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2402/89 1989-06-27
CH2402/89A CH678949A5 (es) 1989-06-27 1989-06-27

Publications (2)

Publication Number Publication Date
EP0405044A1 EP0405044A1 (fr) 1991-01-02
EP0405044B1 true EP0405044B1 (fr) 1994-06-01

Family

ID=4232951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810518A Expired - Lifetime EP0405044B1 (fr) 1989-06-27 1989-07-10 Alliage d'or

Country Status (8)

Country Link
US (2) US5059255A (es)
EP (1) EP0405044B1 (es)
JP (1) JPH0331436A (es)
AT (1) ATE106458T1 (es)
CA (1) CA1335630C (es)
CH (1) CH678949A5 (es)
DE (1) DE68915753T2 (es)
ES (1) ES2055153T3 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW360716B (en) * 1993-02-19 1999-06-11 Citizen Watch Co Ltd Golden decorative part and process for producing the same
JP2807398B2 (ja) * 1993-08-03 1998-10-08 和明 深道 磁気抵抗効果材料、その製造方法および磁気抵抗素子
US6071471A (en) * 1997-07-31 2000-06-06 Harry Winston Inc. Composition for jewelry
US20060086441A1 (en) * 2004-10-27 2006-04-27 University Of Cincinnati Particle reinforced noble metal matrix composite and method of making same
WO2006111178A1 (fr) * 2005-04-19 2006-10-26 Ludwig Müller S.A. Alliage de metal precieux
CH697875B1 (fr) * 2005-07-16 2009-03-13 Ludwig Mueller Alliage de métal précieux.
US12077839B1 (en) 2023-07-26 2024-09-03 Chow Sang Sang Jewellery Company Limited Alloy with interference thin film and method for making the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US660983A (en) * 1899-05-24 1900-10-30 George M Pearce Art of hardening and tempering copper, gold, or silver.
US1580443A (en) * 1924-05-15 1926-04-13 Shields & Moore Gold alloy
DE896114C (de) * 1944-05-10 1953-11-09 Heraeus Gmbh W C Verwendung von Goldlegierungen fuer Potentiometer
US2576738A (en) * 1949-04-21 1951-11-27 Metals & Controls Corp Gold alloys
FR1442528A (fr) * 1965-05-07 1966-06-17 Procédé chimique de modification de la couleur d'un alliage légal d'or de bijouterie
DE2226267B2 (de) * 1972-05-30 1977-06-02 Pharmazeutische Fabrik Evers & Co, 2080 Pinneberg Komplexverbindung aus asparaginat-, cer(iii)- und zink-ionen, verfahren zu deren herstellung und diese enthaltende arzneimittel
JPS575833A (en) * 1980-06-11 1982-01-12 Ishifuku Kinzoku Kogyo Kk Gold permanent magnet alloy
JPS59190340A (ja) * 1983-04-12 1984-10-29 Citizen Watch Co Ltd 気相メツキ用金合金
GB2184457B (en) * 1985-12-06 1989-03-30 Vittorio Antoniazzi Gold alloy

Also Published As

Publication number Publication date
DE68915753T2 (de) 1994-09-22
DE68915753D1 (de) 1994-07-07
JPH05459B2 (es) 1993-01-06
US5164026A (en) 1992-11-17
US5059255A (en) 1991-10-22
ES2055153T3 (es) 1994-08-16
ATE106458T1 (de) 1994-06-15
JPH0331436A (ja) 1991-02-12
CH678949A5 (es) 1991-11-29
EP0405044A1 (fr) 1991-01-02
CA1335630C (fr) 1995-05-23

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