EP0405044A1 - Gold alloy - Google Patents

Gold alloy Download PDF

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Publication number
EP0405044A1
EP0405044A1 EP89810518A EP89810518A EP0405044A1 EP 0405044 A1 EP0405044 A1 EP 0405044A1 EP 89810518 A EP89810518 A EP 89810518A EP 89810518 A EP89810518 A EP 89810518A EP 0405044 A1 EP0405044 A1 EP 0405044A1
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EP
European Patent Office
Prior art keywords
alloy
gold
temperature
oven
treatment
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.)
Granted
Application number
EP89810518A
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German (de)
French (fr)
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EP0405044B1 (en
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
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Muller Ludwig SA
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Publication date
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Publication of EP0405044A1 publication Critical patent/EP0405044A1/en
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Publication of EP0405044B1 publication Critical patent/EP0405044B1/en
Anticipated expiration legal-status Critical
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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
    • 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.
  • One can also use an alloy of gold and iron, which is distinguished by its blue color due to the oxidation of iron.
  • the subject of the invention is a gold alloy characterized in that it comprises at least 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.
  • 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 method of treating gold objects made from the claimed alloy, characterized in that the gold object is heated, in an oven brought to a predetermined temperature, under normal atmosphere, for a predetermined period, 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 oven temperature is 450 to 600 ° C and the duration of the heat treatment depends on the one hand on external factors such as 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 of an alloy characterized in that a heat treatment is carried out on said alloy at a temperature between 450 and 600 °, for a predetermined period, in order to obtain surface coloring of the alloy.
  • the alloy intended to be treated in the oven to obtain a surface coloration can be obtained from a primary alloy.
  • a primary alloy For example, by founding 80% fine 24-carat 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 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.

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  • 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)
  • Powder Metallurgy (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

A gold alloy comprises at least gold, iron and nickel, the gold being present in an amount between about 74.4 and 94.5 percent by weight of the alloy, the iron being present in an amount between about 5.0 and 25.0 percent by weight of the alloy, and the nickel being present in an amount between about 0.5 to about 0.6 percent by weight of the alloy. Heat treatment of the alloy causes a visually observable blue coloration.

Description

Cette invention est du domaine de la métallurgie et concerne plus particulièrement un alliage à base d'or.This invention is in the field of metallurgy and relates more particularly to a gold-based alloy.

Pour réaliser des bijoux et des pièces d'orfè­vrerie, il est intéressant d'utiliser des ors ayant dif­férentes colorations, permettant d'obtenir un effet déco­ratif.To make jewelry and gold pieces, it is interesting to use golds with different colors, to obtain a decorative effect.

A cet effet, on peut employer des alliages dont l'un des composants confère une couleur prédominante à l'ensemble. Par exemple, on ajoute du cuivre à l'or pour obtenir un alliage d'or rouge ou du palladium pour obtenir un alliage d'or gris. On peut également utiliser un alliage d'or et de fer, qui se distingue par sa cou­leur bleue due à l'oxydation du fer.For this purpose, alloys can be used, one of the components of which gives a predominant color to the whole. For example, copper is added to the gold to obtain a red gold alloy or palladium to obtain a gray gold alloy. One can also use an alloy of gold and iron, which is distinguished by its blue color due to the oxidation of iron.

On peut également obtenir une coloration de la surface métallique, par électrodéposition ou par traitement thermique.It is also possible to obtain a coloration of the metal surface, by electrodeposition or by heat treatment.

L'invention a pour objet un alliage d'or caractérisé en ce qu'il comprend au moins les éléments suivants : Au 74,4 à 94,5 % Fe 5 à 25 % Ni 0,5 à 0,6 % où les teneurs sont exprimées en pourcentage en poids par rapport au poids total de l'alliage.The subject of the invention is a gold alloy characterized in that it comprises at least 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.

Dans une première forme d'exécution préféren­tielle, les teneurs sont plus précisément les suivantes : Au 85 % Fe 14,4 % Ni 0,6 % In a first preferred embodiment, the contents are more precisely the following: At 85% Fe 14.4% Or 0.6%

Dans une seconde variante, les teneurs sont de : Au 75 % Fe 24,4 % Ni 0,6 % In a second variant, the contents are: At 75% Fe 24.4% Or 0.6%

Il va de soi que l'invention s'étend également à un pré-alliage destiné à être synthétisé avec de l'or fin, pour obtenir la composition finale revendiquée.It goes without saying that the invention also extends to a pre-alloy intended to be synthesized with fine gold, in order to obtain the final composition claimed.

L'invention s'étend également à un procédé de traitement d'objets d'or fabriqués à partir de l'alliage revendiqué, caractérisé en ce que l'objet d'or est chauf­fé, dans un four porté à une température prédéterminée, sous atmosphère normale, pendant une durée prédéterminée, puis refroidi à température ambiante après sortie du four pour obtenir un bleuissement de surface dû à l'oxydation des éléments non précieux contenus dans l'alliage.The invention also extends to a method of treating gold objects made from the claimed alloy, characterized in that the gold object is heated, in an oven brought to a predetermined temperature, under normal atmosphere, for a predetermined period, 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.

La température du four est de 450 à 600°C et la durée du traitement thermique dépend d'une part de facteurs extérieurs tels que degré d'humidité ou tempéra­ture ambiante et d'autre part de la grosseur des objets. Elle sera plus longue pour les grosses pièces (boîtes de montres ou bijoux par exemple) que pour les petites (éléments de bagues, de bracelets ou clips).The oven temperature is 450 to 600 ° C and the duration of the heat treatment depends on the one hand on external factors such as 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).

La durée du traitement thermique dépend en outre de la température du four et est moindre lorsque la température du four est plus élevée.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.

La bleuissement d'un objet réalisé avec la pre­mière variante d'alliage à 20 carats est plus prononcé que celui d'une objet réalisé avec la seconde variante d'alliage à 18 carats, qui tire sur le bleu-vert.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.

L'invention s'étend encore à l'utilisation d'un alliage caractérisée en ce que l'on effectue, sur ledit alliage, un traitement thermique à une température com­prise entre 450 et 600°, pendant une durée prédéterminée, afin d'obtenir une coloration de surface de l'alliage.The invention further extends to the use of an alloy characterized in that a heat treatment is carried out on said alloy at a temperature between 450 and 600 °, for a predetermined period, in order to obtain surface coloring of the alloy.

Comme mentionné précédemment, l'alliage destiné à être traité au four pour obtenir une coloration de surface peut être obtenu à partir d'un alliage primaire. Par exemple, en fondant 80 % d'or fin de 24 carats avec 20 % pré-alliage, ce dernier doit présenter les teneurs en poids suivantes : Au 25 % Fe 72 % Ni 3 % pour réaliser le premier alliage final préférentiel cité précédemment.As mentioned above, the alloy intended to be treated in the oven to obtain a surface coloration can be obtained from a primary alloy. For example, by founding 80% fine 24-carat 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.

Si le poids de l'alliage primaire est de X % de l'alliage final obtenu par mélange de X % d'alliage pri­maire et de (100 - X) % d'or fin, on peut également écrire, dans l'exemple déjà cité d'alliage final contenant : Au 85 % (en poids) Fe 14,4 % Ni 0,6 % que les composants de l'alliage primaire sont respective­ment : Au [85 - (100-X)] x 100/X % Fe 14,4 x 100/X % Ni 0,6 x 100/X % If the weight of the primary alloy is X% of the final alloy obtained by mixing X% of primary alloy and (100 - X)% of fine gold, one can also write, in the example already final alloy city containing: At 85% (by weight) Fe 14.4% Or 0.6% that the components of the primary alloy are respectively: At [85 - (100-X)] x 100 / X% Fe 14.4 x 100 / X% Or 0.6 x 100 / X%

D'une manière plus générale, la composition de l'alliage primaire sera donnée par les formules : Au [(74,4 à 94,5) - (100-X)] x 100/X % Fe [5 à 25] x 100/X % Ni [0,5 à 0,6] x 100/X % More generally, the 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%

L'alliage obtenu a un point de fusion de l'ordre de 1000° à 1100°. Les pièces réalisées peuvent être assemblées par brasage, en utilisant les alliages de brasure conventionnels, avec les ajouts habituels pour obtenir une gamme de brasures utilisables à des tempéra­tures décroissantes à partir d'une température d'environ 100° inférieure à la température de fusion de l'alliage.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.

Claims (9)

1. Alliage d'or caractérisé en ce qu'il comprend au moins les éléments suivants : Au 74,4 à 94,5 % Fe 5 à 25 % Ni 0,5 à 0,6 %
où les teneurs sont exprimées en pourcentage en poids par rapport au poids total de l'alliage.1. Gold alloy characterized in that it comprises at least 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. 2. Alliage d'or selon la revendication 1, caracté­risé en ce qu'il comprend au moins les éléments suivants : Au 85 % Fe 14,4 % Ni 0,6 %
2. Gold alloy according to claim 1, characterized in that it comprises at least the following elements: At 85% Fe 14.4% Or 0.6%
3. Alliage d'or selon la revendication 1, caracté­risé en ce qu'il comprend au moins les éléments suivants : Au 75 % Fe 24,4 % Ni 0,6 %
3. Gold alloy according to claim 1, characterized in that it comprises at least the following elements: At 75% Fe 24.4% Or 0.6%
4. Alliage d'or selon la revendication 1, caracté­risé en ce qu'il comprend le mélange de (100-X) % d'or pur destiné à être synthétisé avec X % d'un pré-alliage de : Au [(74,4 à 94,5) - (100-X)] x 100/X % Fe [5 à 25] x 100/X % Ni [0,5 à 0,6] x 100/X %
4. Gold alloy according to claim 1, characterized in that it comprises the mixture of (100-X)% of pure gold intended to be synthesized with X% of a pre-alloy of: 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%
5. Procédé de traitement d'objets d'or fabriqués à partir de l'alliage des revendications 1 à 4, caractérisé en ce que l'objet d'or est chauffé, dans un four porté à une température prédéterminée, sous atmosphère normale, pendant une durée prédéterminée, puis refroidi à tem­térature ambiante après sortie du four pour obtenir un bleuissement de surface dû à l'oxydation des éléments non précieux contenus dans l'alliage.5. Process for the treatment of gold objects made from the alloy of claims 1 to 4, characterized in that the gold object is heated, in an oven brought to a predetermined temperature, under normal atmosphere, for a predetermined period, then cooled to room temperature after removal from the oven to obtain a surface bluing due to the oxidation of the non-precious elements contained in the alloy. 6. Procédé de traitement d'objets selon la reven­dication 5, caractérisé en ce que la température du four est comprise entre 450 et 600°C.6. A method of treating objects according to claim 5, characterized in that the temperature of the oven is between 450 and 600 ° C. 7. Procédé de traitement d'objets selon la reven­dication 5, caractérisé en ce que la durée du traitement est fonction de la grosseur et/ou de la surface des piè­ces à colorer, de la température du four, de la tempéra­ture ambiante et du degré d'humidité.7. A method of treating objects according to claim 5, characterized in that the duration of the treatment is a function of the size and / or the surface of the parts to be colored, the temperature of the oven, the ambient temperature and the degree humidity. 8. Procédé de traitement d'objets selon les revendications 6 et 7, caractérisé en ce que la durée du traitement est moindre lorsque la température du four est plus élevée.8. A method of treating objects according to claims 6 and 7, characterized in that the duration of the treatment is less when the temperature of the oven is higher. 9. Utilisation d'un alliage selon les revendica­tions 1 à 4, caractérisée en ce que l'on effectue, sur ledit alliage, un traitement thermique à une température comprise entre 450 et 600° pendant une durée prédéter­minée, afin d'obtenir une coloration de surface de l'alliage.9. Use of an alloy according to claims 1 to 4, characterized in that one carries out, on said alloy, a heat treatment at a temperature between 450 and 600 ° for a predetermined period, in order to obtain a coloring surface of the alloy.
EP89810518A 1989-06-27 1989-07-10 Gold alloy Expired - Lifetime EP0405044B1 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

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EP89810518A Expired - Lifetime EP0405044B1 (en) 1989-06-27 1989-07-10 Gold alloy

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111178A1 (en) * 2005-04-19 2006-10-26 Ludwig Müller S.A. Precious metal alloy

Families Citing this family (5)

* 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 (en) * 1993-08-03 1998-10-08 和明 深道 Magnetoresistance effect material, method of manufacturing the same, and magnetoresistance element
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
CH697875B1 (en) * 2005-07-16 2009-03-13 Ludwig Mueller precious metal alloy.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1580443A (en) * 1924-05-15 1926-04-13 Shields & Moore Gold alloy
US2576738A (en) * 1949-04-21 1951-11-27 Metals & Controls Corp Gold alloys
DE896114C (en) * 1944-05-10 1953-11-09 Heraeus Gmbh W C Use of gold alloys for potentiometers
FR1442528A (en) * 1965-05-07 1966-06-17 Chemical process for changing the color of legal jewelry gold alloy

Family Cites Families (5)

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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.
DE2226267B2 (en) * 1972-05-30 1977-06-02 Pharmazeutische Fabrik Evers & Co, 2080 Pinneberg COMPLEX COMPOUND OF ASPARAGINATE, CER (III) AND ZINC IONS, PROCESS FOR THEIR PRODUCTION AND MEDICINAL PRODUCTS CONTAINING THESE
JPS575833A (en) * 1980-06-11 1982-01-12 Ishifuku Kinzoku Kogyo Kk Gold permanent magnet alloy
JPS59190340A (en) * 1983-04-12 1984-10-29 Citizen Watch Co Ltd Gold alloy for vapor phase plating
GB2184457B (en) * 1985-12-06 1989-03-30 Vittorio Antoniazzi Gold alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1580443A (en) * 1924-05-15 1926-04-13 Shields & Moore Gold alloy
DE896114C (en) * 1944-05-10 1953-11-09 Heraeus Gmbh W C Use of gold alloys for potentiometers
US2576738A (en) * 1949-04-21 1951-11-27 Metals & Controls Corp Gold alloys
FR1442528A (en) * 1965-05-07 1966-06-17 Chemical process for changing the color of legal jewelry gold alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111178A1 (en) * 2005-04-19 2006-10-26 Ludwig Müller S.A. Precious metal alloy

Also Published As

Publication number Publication date
JPH05459B2 (en) 1993-01-06
US5164026A (en) 1992-11-17
DE68915753T2 (en) 1994-09-22
CA1335630C (en) 1995-05-23
EP0405044B1 (en) 1994-06-01
ATE106458T1 (en) 1994-06-15
ES2055153T3 (en) 1994-08-16
US5059255A (en) 1991-10-22
JPH0331436A (en) 1991-02-12
DE68915753D1 (en) 1994-07-07
CH678949A5 (en) 1991-11-29

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