Jewelry, jewelry alloy, and method for manufacturing jewelry alloy

Abstract

To provide alloys for decorative objects that enable new colors. The present invention provides an ornament made of a copper-containing gold alloy, which is composed of 75.0 to 75.2% by weight of gold, 16.5 to 17.0% by weight of copper, 3.1 to 7.1% by weight of silver, 1.2 to 3.2% by weight of palladium, and the balance being 0.5 to 2.5% by weight of zinc.

Description

[Technical Field]

[0001] The present invention relates to an ornament (jewelry), in particular a ring-shaped ornament, a part of an ornament or a semi-finished product for the manufacture of an ornament, an alloy for the manufacture of such an ornament and a method for the manufacture of an alloy for an ornament, according to the preamble of claim 1. The ornament is in this case made from a gold alloy containing a copper component. [Background technology]

[0002] From DE 60310555T2, alloys for the production of timepieces, ornaments and jewellery are known, which contain at least 75% by weight of gold and at least 14% by weight of copper. Furthermore, it is described how, in the case of gold alloys of this type, colour tones from red through rose to yellow can be achieved depending on the proportions of copper and silver. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] DE60310555T2 [Patent Document 2] JP2005082890A Summary of the Invention [Problem to be solved by the invention]

[0004] In the jewelry market, there is a demand for alloys that go beyond existing color gold alloys and allow for new color variations, particularly when producing gold jewelry, and that can be manufactured relatively cost-effectively.

[0005] From JP2005082890A, a gold alloy is known which contains, in addition to the main component gold, 18-20% by weight of a copper component, 2-5% by weight of a silver component, 1.5-2.5% by weight of a palladium component, and 0.4-0.6% by weight of a zinc component, in this case producing a pink-based color tone.

[0006] The object of the present invention is to make it possible to create new colors in such decorations and to ensure good processability, for example in continuous casting processes. [Means for solving the problem]

[0007] According to a first aspect of the present invention, there is provided jewelry made of a copper-containing gold alloy, wherein: The gold alloy is 75.0% to 75.2% by weight of gold; 16.5% to 17.0% by weight of copper; 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and As the remainder 0.5% to 2.5% by mass of zinc lead mosquito It will consist of (Form 1). According to the second aspect of the present invention 、 treasure For the manufacture of ornaments The copper-containing gold of the present invention An alloy is provided (Form 4). According to a third aspect of the present invention, copper-bearing gold A method for producing an alloy is provided, comprising: The zinc component is obtained by melting brass with other components. (Form 5). DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, a preferred embodiment of the present invention will be described. (Mode 1) See the first aspect of the present invention above. (Embodiment 2) In the jewelry according to embodiment 1, The gold alloy is 75.0% to 75.2% by weight of gold; 16.5% to 17.0% by weight of copper; 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and As the remainder 0.8% to 1.1% by mass of zinc lead mosquito It is preferable that the sensor is composed of: (Embodiment 3) In the jewelry according to embodiment 2, The gold alloy is 75.1% by mass gold, 16.5% to 17.0% by weight of copper; 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and As the remainder 0.8% to 1.1% by mass of zinc lead mosquito It is preferable that the sensor is composed of: (Mode 4) See the second aspect of the present invention above. (Mode 5) See the third aspect of the present invention above. (Mode 6) In the production method according to Mode 5, The brass is preferably melted in the form of CuZn37. (Mode 7) In the production method according to Mode 5 or 6, Preferably, the melt is manually cast after its production. (Embodiment 8) In the production method according to embodiment 5 or 6, After its production, the melt is preferably subjected to a continuous casting process.

[0009] The above-mentioned problem is solved by an ornament (jewelry) made of a copper-containing gold alloy having the features of claim 1. In this case, the gold alloy is composed of at least 75.0% to at most 75.2% by weight of gold, at least 16.5% to at most 17.0% by weight of copper, at least 3.1% to at most 7.1% by weight of silver, at least 1.2% to at most 3.2% by weight of palladium, and the remainder being at least 0.5% to at most 2.5% by weight of zinc. This results in an ornament with a novel color tone that can be called champagne.

[0010] In one particularly preferred embodiment, the (gold) alloy comprises at least 75.0 to 75.2%, in particular 75.1%, by weight of gold, 16.5 to 17.0%, by weight of copper, 3.1 to 7.1%, by weight of silver, 1.2 to 3.2%, by weight of palladium, and the remainder comprising 0.8 to 1.1%, by weight of zinc. With such a composition, a particularly intense champagne color can be achieved and particularly good workability of the gold-copper alloy can be ensured.

[0011] Furthermore, the above-mentioned object is achieved by a method in which the zinc component of the (gold) alloy is obtained at least in part by melting brass and other (metallic) components (other than zinc). In this way, the zinc component of the melt can be produced in a particularly simple manner.

[0012] Advantageously, the brass to be melted in this case is constituted by Cu63Zn37 brass, as this allows the desired zinc component to be melted particularly simply and in precise amounts.

[0013] After the preparation of the corresponding melt (of the constituent metals of the gold alloy), the melt is preferably poured and cast by hand (into a mould or the like) to enable the production of small or even particularly filigree ornaments in champagne tones.

[0014] Alternatively or additionally, the melt (of the constituent metals of the gold alloy), especially in larger quantities, can be subjected to a continuous casting process, for example to make it possible to produce semi-finished products which can then be further processed into decorative articles, for example to produce fully or partially champagne-colored decorative rings. [Example]

[0015] Below is given one preferred composition of the (metal) melt for the production of decoration alloys and decorations with an especially brilliant champagne color tone.

[0016] 75.1% by mass gold 15.1% by mass copper 5.1% by mass silver 2.2% by mass palladium 2.5% by mass CuZn37-brass

Claims

1. 1. Jewelry made of a copper-containing gold alloy, The gold alloy is 75.0% to 75.2% by weight of gold; 16.5% to 17.0% by weight of copper, 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and the balance being 0.5% to 2.5% by weight of zinc It consists of Jewellery characterized by.

2. 10. The jewelry of claim 1, The gold alloy is 75.0% to 75.2% by weight of gold; 16.5% to 17.0% by weight of copper, 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and the balance being 0.8% to 1.1% by weight of zinc It consists of Jewellery characterized by.

3. 3. The jewelry of claim 2, The gold alloy is 75.1% by weight of gold, 16.5% to 17.0% by weight of copper, 3.1% to 7.1% by weight of silver; 1.2% to 3.2% by weight of palladium, and the balance being 0.8% to 1.1% by weight of zinc It consists of Jewellery characterized by.

4. A copper-containing gold alloy according to any one of claims 1 to 3 for the manufacture of jewelry.

5. 5. A method for producing the copper-containing gold alloy according to claim 4, comprising: The zinc component is obtained by melting brass with other components. A manufacturing method characterized by:

6. The manufacturing method according to claim 5, The brass is melted in the form of CuZn37. A manufacturing method characterized by:

7. 7. The method according to claim 5 or 6, The melt is then hand-cast after its production A manufacturing method characterized by:

8. 7. The method according to claim 5 or 6, The melt is subjected to continuous casting after its production. A manufacturing method characterized by: