Classifications

• • 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
  • C22C9/04—Alloys based on copper with zinc as the next major constituent
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
  • A44C27/00—Making jewellery or other personal adornments
  • A44C27/001—Materials for manufacturing jewellery
  • A44C27/002—Metallic materials
  • A44C27/003—Metallic alloys

Definitions

• the invention concerns an alloy for the production of jewels, in particular precious jewels or trinkets.
• the invention concerns also objects, in particular jewels, produced with this alloy.
• the object of the present invention is to provide an improved alloy that overcomes the drawbacks listed above.
• the object of the present invention is mainly to propose an alloy with a low precious metal carat rating that, in addition to not oxidizing easily and having good workability, imitates the aspect and the brightness of precious metals and their alloys.
• an alloy for the production of jewels that is constituted by: 7-16% silver by weight; 15-36% zinc by weight; 0.1-4.17% by weight of a metal or a combination of metals selected among a) gold and platinum, b) gold and palladium, c) gold, platinum and palladium, d) platinum, e) palladium, and f) platinum and palladium; 0-0.5% by weight of one or more metals selected among iridium, germanium, silicon, osmium, tin, indium and gallium, preferably iridium, germanium, silicon and gallium, while the remaining percentage needed to reach 100% by weight is copper.
• the alloys described herein can always contain other elements, meaning elements that are not listed as components that make up the alloy, in the form of inevitable traces. These traces derive from impurities present in the raw materials or are residues of auxiliary materials used during the production or processing of the alloy. In this case, the remaining percentage needed to reach 100% by weight according to the first claim is constituted by copper and inevitable impurities.
• the traces are present in total quantities not exceeding 0.2% by weight.
• metals such as gallium and/or indium helps lower the melting point of the alloy.
• forming in this case silicon-free alloys are preferably used
• welding in this case indium should be preferably added
• the expert in the art thanks to his/her general knowledge of the matter, changes the percentages of the auxiliary components.
• the low carat rating of gold, platinum and palladium, respectively makes it possible to produce alloys that imitate the colours of the respective precious metals or their alloys while at the same time showing a high degree of brightness.
• the alloy is very elastic, easy to clean, polish and machine and has good lapping values, partly better than those of other alloys with higher carat rating.
• the alloy does not contain iridium, germanium, silicon, osmium, tin, indium and gallium as elements that make up the alloy.
• the alloy in any case, can contain these elements within the group consisting of traces of other elements.
• compositions that in the search for economic alloys with low precious metal carat rating have proved to be particularly suited to be used to make trinkets, because they do not oxidize easily, are easy to machine and shiny, and imitate the shades of alloys with high carat rating.
• a much preferred variant embodiment of the invention concerns an alloy comprising approximately 4.17% by weight of a metal or a combination of metals selected among a) gold and platinum, b) gold and palladium, c) gold, platinum and palladium, d) platinum, e) palladium, and f) platinum and palladium.
• the alloy comprises gold.
• a preferred alloy according to the invention is an alloy according to the variants a), b) or c) as defined in the first claim, that is, an alloy in which 0.1-4.17% by weight is constituted by a metal or a combination of metals selected among a) gold and platinum, b) gold and palladium and c) gold, platinum and palladium.
• Preferred quantities of gold are 0.2% by weight - 3.5% by weight.
• silver is present in quantities included between 8 and 10% by weight and zinc is present in quantities included between 5 and 9% by weight. Even more preferably, the quantity of silver corresponds to 8.8-9.2% by weight, the quantity of zinc to 16.8-17.2% by weight and the quantity of copper to 69.8-70.2% by weight.
• a further preferred embodiment of the alloy according to the invention is constituted by an alloy comprising approximately 4.17% by weight of a combination of gold, palladium and platinum, in which the three metals are present in equal quantities expressed in weight percentages.
• the alloy comprises approximately 4.17% by weight of a combination of gold and palladium or of a combination of gold and platinum, in which the two metals are present in equal quantities expressed in weight percentages.
• a very advantageous variant embodiment of the invention concerns an alloy comprising approximately 0.5% gold by weight and preferably at least 0.1% platinum by weight. Such an alloy is extraordinarily bright.
• the alloy is constituted by 0.5% gold by weight; 2.5% silver and palladium by weight; 17% zinc by weight and 70% copper by weight.
• this composition there is 0.1% platinum by weight which correspondingly partially replaces silver, palladium, zinc and/or copper.
• the invention furthermore concerns an item, preferably a jewel, produced from an alloy according to the invention.
• items are, for example, coins, tableware, candle holders or other items of art handicraft.
• the alloy according to the invention is suited to be used in the processing cycles that are typical of the jewellery sector.
• the invention achieves the object to provide an economic alloy with low carat rating of gold, platinum and palladium that, in addition to not oxidizing easily and having good workability, imitates the appearance of gold or its alloys with high carat rating and is considerably bright.
• the production of the alloy follows the methods known in the art for producing alloys containing gold, silver, brass, etc. which are not described herein for the sake of brevity.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Adornments (AREA)
• Medicinal Preparation (AREA)
• Saccharide Compounds (AREA)
• Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (5)

Citations (10)

• 2012
  • 2012-12-17 IT IT000335A patent/ITVI20120335A1/it unknown
• 2013
  • 2013-12-16 ES ES13824341.5T patent/ES2640020T3/es active Active
  • 2013-12-16 PL PL13824341T patent/PL2931929T3/pl unknown
  • 2013-12-16 WO PCT/IB2013/002810 patent/WO2014096938A1/en active Application Filing
  • 2013-12-16 EP EP13824341.5A patent/EP2931929B1/de active Active

Patent Citations (10)

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