CA2670604A1 - Brown gold alloy - Google Patents
Brown gold alloy Download PDFInfo
- Publication number
- CA2670604A1 CA2670604A1 CA 2670604 CA2670604A CA2670604A1 CA 2670604 A1 CA2670604 A1 CA 2670604A1 CA 2670604 CA2670604 CA 2670604 CA 2670604 A CA2670604 A CA 2670604A CA 2670604 A1 CA2670604 A1 CA 2670604A1
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- CA
- Canada
- Prior art keywords
- gold
- alloy
- copper
- indium
- weight
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- 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.)
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Classifications
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- 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
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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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)
Abstract
A Gold-Copper-Indium-Tin-Manganese Alloy which has a brown color, visually similar to that of Bronze.
Additionally, it is tarnish resistant and ductile due to its specific formulation and micro-structure.
Composition of elements, by weight, is as follows:
about 33.3% - 83.3% Gold about 0.67% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper
Additionally, it is tarnish resistant and ductile due to its specific formulation and micro-structure.
Composition of elements, by weight, is as follows:
about 33.3% - 83.3% Gold about 0.67% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper
Description
FIELD OF INVENTION
[001 ]The present invention is related to Gold alloys. More specifically, to colored Gold alloys.
BACKGROUND OF INVENTION
[001 ]The present invention is related to Gold alloys. More specifically, to colored Gold alloys.
BACKGROUND OF INVENTION
[002]Gold, as found in nature, has a strong yellow color to it. Through the years, by alloying it with other metals, the following colors have become established in the jewelry industry:
Yellow- Alloyed with Copper, Silver, and Zinc White- Alloyed with Palladium, Nickel, Platinum, and Zinc Red- Alloyed with Copper Green- Alloyed with Copper, Silver, and Cadmium [003]These colors are all available with good mechanical properties.
Specifically, they have been developed over many years to maintain their characteristic ductile nature and tarnish resistance. Other colors are available but often they have other negative features. A purple coloration, for example, was created by alloying aluminum to the gold, but it is brittle and as such can't be used for types of jewelry where flexibility and ductability are important.
Yellow- Alloyed with Copper, Silver, and Zinc White- Alloyed with Palladium, Nickel, Platinum, and Zinc Red- Alloyed with Copper Green- Alloyed with Copper, Silver, and Cadmium [003]These colors are all available with good mechanical properties.
Specifically, they have been developed over many years to maintain their characteristic ductile nature and tarnish resistance. Other colors are available but often they have other negative features. A purple coloration, for example, was created by alloying aluminum to the gold, but it is brittle and as such can't be used for types of jewelry where flexibility and ductability are important.
[004]Detailed formulas for all currently known colored gold alloys are available in "Jewelry Concepts and Technology" by Oppi Untracht on page 391 (Published in 1985 by Doubleday &
Company, Inc ISBN
0-385-04185-3) [005]During the last 10 years their have been golds available with a brown surface coloration.
Unfortunately, these are all just surface colorations. This is a problem because often people wear their jewelry on a regular basis. As such, during the course of a day they may either rub their jewelry as a nervous habit or dent it against something. These events can lead to the surface treatment being rubbed off, damaged, or exposed to surface oxidation. After a while, this will mean that the treatment will have to be applied again, leading to additional cost to the consumer, and occasionally wear to the jewelry. Some of the methods used to give this brown color to the Gold include: plasma surface deposition, heat treatments, surface oxidation, laser coloration or a combination of the above.
These treatments allow us to see the reflected light as brown but they are only temporary solutions. Often, on rings, these treatments will wear out very quickly in patches leaving the consumer with a ring which exposes a different color of metal underneath. It is because of this that there is a need to make a brown colored gold alloy which is both castable, rollable, and has a coloration which goes through the entire casted piece.
BRIEF DESCRIPTION OF PRESENT INVENTION
Company, Inc ISBN
0-385-04185-3) [005]During the last 10 years their have been golds available with a brown surface coloration.
Unfortunately, these are all just surface colorations. This is a problem because often people wear their jewelry on a regular basis. As such, during the course of a day they may either rub their jewelry as a nervous habit or dent it against something. These events can lead to the surface treatment being rubbed off, damaged, or exposed to surface oxidation. After a while, this will mean that the treatment will have to be applied again, leading to additional cost to the consumer, and occasionally wear to the jewelry. Some of the methods used to give this brown color to the Gold include: plasma surface deposition, heat treatments, surface oxidation, laser coloration or a combination of the above.
These treatments allow us to see the reflected light as brown but they are only temporary solutions. Often, on rings, these treatments will wear out very quickly in patches leaving the consumer with a ring which exposes a different color of metal underneath. It is because of this that there is a need to make a brown colored gold alloy which is both castable, rollable, and has a coloration which goes through the entire casted piece.
BRIEF DESCRIPTION OF PRESENT INVENTION
[006]The main object of the present invention was create a new color of gold by taking the existing formula for red gold and shifting it towards a more brown color. This was done by using specific formulation and developing a specific micro-structure. A Gold-Copper-Indium-Tin-Manganese alloy, when used for jewelery, has to be easily fabricated by both hot and cold forming methods. In order to do this the grain of the metal has to be very small. Metal with this micro-structure is usually much easier to work with during fabrication. It is these features of our brown gold alloy along with it's ductability and flexibility which could lead to it becoming very popular for use in production of Jewelery, Watches, Coins, Gift ware, Kitchenware etc. By retaining these features even after combining the Gold with other metals we have created a new alloy which will be able to be used by anyone familiar with how to work with Gold. This new color will be able to be combined with other colors of Gold in order to create new contrasts and aesthetic value. People wearing this high carat gold jewelery are also, potentially, less likely to be robbed as the new alloy's coloration may lead criminals to believe it is a false gold. This will allow anyone wearing the jewelery to feel more comfortable wearing it without having to feel they are putting themselves more at risk. Finally, our brown gold alloys in 18k and 20k will hold their color forever because their formulation is immune to oxidation or sulfur pollution. This is because high carat golds (18k and above) are not reactive to sulfur or other oxidants.
This gold is created using following formula:
about 33.3% - 83.3% Gold about 0.67% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper DETAILED DESCRIPTION OF PRESENT INVENTION
This gold is created using following formula:
about 33.3% - 83.3% Gold about 0.67% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper DETAILED DESCRIPTION OF PRESENT INVENTION
[007]The brown or chocolate colored gold alloy is made using:
For 20k purity gold (20 parts gold out of 24 parts metal by weight):
about 83.3% Gold about 0.67% Indium about 0.17% Everdure Bronzea about 15.86% Copper For 18k purity gold (18 parts gold out of 24 parts metal by weight):
about 75% Gold about 0.75% Indium about 24.25% Copper a : Formula for Everdure is:
about 95% copper, about 4% silicon, about 1% manganese [008]The 20k and l8k gold alloys, when exposed to temperatures between about 80 C and 750 C became brittle when they cooled. To restore the flexibility of the metal annealing to red hot (about 800 C) was required followed by a rapid quenching in cold water. This allowed the grain of the metal to be formed quite small, which in turn allowed the alloy to maintain it's ductability and flexibility. In order to get the proper annealing and quenching effect the whole flask must be let cool in air, then pieces removed from the tree by cutting, and individual pieces annealed then quenched. If the flask is quenched as a whole within 4 or 5 minutes of casting then the quenching will not be uniform throughout the batch. This can lead to spots which are brittle. These metals are castable, rollable.
For 14k purity gold (14 parts gold out of 24 parts metal by weight):
about 58.33% Gold about 40.14% Copper about 0.60% Indium about 0.90% Tin about 0.03% Silver [009]This 14k brown gold alloy is more suitable for stamping and rolling as it will cause less wear on the stamp, die, or roller then the following 14k gold alloy. This alloy does also have good casting properties.
For 14K purity gold (14 parts gold out of 24 parts metal by weight):
about 58.3% Gold about 1.25% Indium about 0.42% Manganese about 40.03% Copper [010]This alloy is suitable for casting and rolling as it has a higher tensile strength and is more wear resistant then the previous 14k brown gold alloy.
For 14K purity gold (14 parts gold out of 24 parts metal by weight):
about 58.33% Gold about 2.09% Indium about 39.58% Copper [011]This alloy is suitable for rolling as it has better flexibility then the other two 14k brown gold alloy.
For I Ok purity gold (10 parts gold out of 24 parts metal by weight):
about 41.7% Gold about 53.33% Copper about 4.08% Indium about 0.84% Tin about 0.03% Silver about 0.023% Silicon For 8k purity gold (8 parts gold out of 24 parts metal by weight):
about 33.3% Gold about 4.67% Indium about 62% Copper about 0.03% Silicon about 0.007% Manganese [012]In 14k, l0k and 8k alloys of gold even when exposed to temperatures of around 80 C to 750 C the metal did not become brittle, and the grain did not grow too large like the 18K and 20k brown gold alloys.
Therefore, they do not require any special treatments such as rapid quenching and can be allowed to cool down in the air.
These metals are castable, and rollable.
For 20k purity gold (20 parts gold out of 24 parts metal by weight):
about 83.3% Gold about 0.67% Indium about 0.17% Everdure Bronzea about 15.86% Copper For 18k purity gold (18 parts gold out of 24 parts metal by weight):
about 75% Gold about 0.75% Indium about 24.25% Copper a : Formula for Everdure is:
about 95% copper, about 4% silicon, about 1% manganese [008]The 20k and l8k gold alloys, when exposed to temperatures between about 80 C and 750 C became brittle when they cooled. To restore the flexibility of the metal annealing to red hot (about 800 C) was required followed by a rapid quenching in cold water. This allowed the grain of the metal to be formed quite small, which in turn allowed the alloy to maintain it's ductability and flexibility. In order to get the proper annealing and quenching effect the whole flask must be let cool in air, then pieces removed from the tree by cutting, and individual pieces annealed then quenched. If the flask is quenched as a whole within 4 or 5 minutes of casting then the quenching will not be uniform throughout the batch. This can lead to spots which are brittle. These metals are castable, rollable.
For 14k purity gold (14 parts gold out of 24 parts metal by weight):
about 58.33% Gold about 40.14% Copper about 0.60% Indium about 0.90% Tin about 0.03% Silver [009]This 14k brown gold alloy is more suitable for stamping and rolling as it will cause less wear on the stamp, die, or roller then the following 14k gold alloy. This alloy does also have good casting properties.
For 14K purity gold (14 parts gold out of 24 parts metal by weight):
about 58.3% Gold about 1.25% Indium about 0.42% Manganese about 40.03% Copper [010]This alloy is suitable for casting and rolling as it has a higher tensile strength and is more wear resistant then the previous 14k brown gold alloy.
For 14K purity gold (14 parts gold out of 24 parts metal by weight):
about 58.33% Gold about 2.09% Indium about 39.58% Copper [011]This alloy is suitable for rolling as it has better flexibility then the other two 14k brown gold alloy.
For I Ok purity gold (10 parts gold out of 24 parts metal by weight):
about 41.7% Gold about 53.33% Copper about 4.08% Indium about 0.84% Tin about 0.03% Silver about 0.023% Silicon For 8k purity gold (8 parts gold out of 24 parts metal by weight):
about 33.3% Gold about 4.67% Indium about 62% Copper about 0.03% Silicon about 0.007% Manganese [012]In 14k, l0k and 8k alloys of gold even when exposed to temperatures of around 80 C to 750 C the metal did not become brittle, and the grain did not grow too large like the 18K and 20k brown gold alloys.
Therefore, they do not require any special treatments such as rapid quenching and can be allowed to cool down in the air.
These metals are castable, and rollable.
[013]ln all the above alloys the modifiers silicon, silver, and manganese were used as scavengers for oxygen and allowed for smaller grains to be formed. Also, manganese helps to improve the darkness of the brown coloration, and to improve the strength of the alloy. Additionally, the modifiers were used to make it easier to get a good polish on the metal.
[014]All the brown gold alloys have very good re-castability because all the metals used in the alloys have high boiling point temperatures (above 2000 C). Therefore the metals do not evaporate out while casting as the casting temperature (melting temperature) is around 900 C. This also means that the color should stay in the metal after numerous castings.
Claims (9)
1 BROWN GOLD ALLOY
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. An alloy of gold which is ductile and has a shade of brown similar to the color of bronze which is uniform across the cast; this alloy is composed (by weight) of:
about 33.3% - 83.3% Gold about 0.6% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. An alloy of gold which is ductile and has a shade of brown similar to the color of bronze which is uniform across the cast; this alloy is composed (by weight) of:
about 33.3% - 83.3% Gold about 0.6% to 4.67% Indium about up to 0.9% Tin about up to 0.42% Manganese about up to 0.04% Silicon, and 0.03% Silver as modifiers with the remainder being Copper
2. The alloy as defined in claim 1 whereby the formula, as 20k Gold, is defined (by weight) as follows:
about 83.3% Gold about 0.67% Indium about 0.17% Everdure Bronze a a : Formula for Everdure is:
about 95% copper about 15.86% Copper
about 83.3% Gold about 0.67% Indium about 0.17% Everdure Bronze a a : Formula for Everdure is:
about 95% copper about 15.86% Copper
3. The alloy as defined in claim 1 whereby the formula, as 18k Gold, is defined (by weight) as follows:
about 75% Gold about 0.75% Indium about 24.25% Copper
about 75% Gold about 0.75% Indium about 24.25% Copper
4. The alloy as defined in claim 1 whereby the formula, as 14k Gold, is defined (by weight) as follows:
about 58.33% Gold about 0.42% Manganese about 1.25% Indium about 40.03% Copper
about 58.33% Gold about 0.42% Manganese about 1.25% Indium about 40.03% Copper
5. The alloy as defined in claim 1 whereby the formula, as 14k Gold, is defined (by weight) as follows:
about 58.33% Gold about 40.14% Copper about 0.60% Indium about 0.90% Tin about 0.03% Silver about 4% silicon about 1% manganese
about 58.33% Gold about 40.14% Copper about 0.60% Indium about 0.90% Tin about 0.03% Silver about 4% silicon about 1% manganese
6. The alloy as defined in claim 1 whereby the formula, as 14K Gold, is defined (by weight) as follows:
about 58.33% Gold about 2.09% Indium about 39.58% Copper
about 58.33% Gold about 2.09% Indium about 39.58% Copper
7. The alloy as defined in claim 1 whereby the formula, as 10k Gold, is defined (by weight) as follows:
about 41.7% Gold about 53.33% Copper about 4.08% Indium about 0.84% Tin about 0.03% Silver about 0.023% Silicon
about 41.7% Gold about 53.33% Copper about 4.08% Indium about 0.84% Tin about 0.03% Silver about 0.023% Silicon
8. The alloy as defined in claim 1 whereby the formula, as 8k Gold, is defined (by weight) as follows:
about 33.3% Gold about 4.67% Indium about 62% Copper about 0.03% Silicon
about 33.3% Gold about 4.67% Indium about 62% Copper about 0.03% Silicon
9. The brown gold alloy as defined in claims 2, 3, 4, 5, 6, 7 and 8 which after repeated casting the color does not fade, it stays brown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2670604 CA2670604A1 (en) | 2009-07-06 | 2009-07-06 | Brown gold alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2670604 CA2670604A1 (en) | 2009-07-06 | 2009-07-06 | Brown gold alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2670604A1 true CA2670604A1 (en) | 2011-01-06 |
Family
ID=43426245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2670604 Abandoned CA2670604A1 (en) | 2009-07-06 | 2009-07-06 | Brown gold alloy |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2670604A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014087216A1 (en) | 2012-12-03 | 2014-06-12 | Argor-Heraeus Sa | Discoloration-resistant gold alloy |
-
2009
- 2009-07-06 CA CA 2670604 patent/CA2670604A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014087216A1 (en) | 2012-12-03 | 2014-06-12 | Argor-Heraeus Sa | Discoloration-resistant gold alloy |
| US10030296B2 (en) | 2012-12-03 | 2018-07-24 | Argor-Heraeus Sa | Discoloration-resistant gold alloy |
| US10683570B2 (en) | 2012-12-03 | 2020-06-16 | Argor-Heraeus Sa | Discoloration-resistant gold alloy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |