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

Definitions

• the invention relates to a bronze alloy containing copper and tin, in particular for the manufacture of ornaments such as jewelry, jewelry articles, watches and watch cases.
• Such bronze alloys are known for their good strength and workability. It is common to add a wide range of other metals and elements such as aluminum, lead, manganese, silicon, beryllium, phosphorus, magnesium or even cadmium as alloying elements in order to achieve the desired requirements and/or a desired appearance.
• the object of the invention is to create a bronze alloy of the type mentioned at the beginning which is easy to cast, which is resistant to corrosion and seawater, is dermatologically harmless and particularly skin-friendly, tarnishes slowly and has a distinctive warm colour tone.
• the bronze alloy contains gold as a further alloy component, wherein the The proportion of tin is between 7 and 9 percent by weight and the proportion of gold is between 19 and 26 percent by weight, and the sum of the proportions of copper, tin and gold is > 99.95 percent by weight of the bronze alloy and the remainder is 100 percent by weight unavoidable impurities.
• alloy components not only achieve the required properties, such as delayed tarnishing or no tarnishing of the bronze alloy, but the gold component also creates a material with lasting value.
• the sum of the proportions of copper, tin and gold > 99.95 percent by weight of the bronze alloy has the advantage that the high purity of the bronze alloy with these three components leads to a particularly high level of skin-friendliness. This means that jewelry made of this bronze alloy can be worn particularly comfortably on a person's skin without causing irritation and is highly compatible with the body.
• the proportion of tin is 8 percent by weight.
• the bronze alloy will at least largely not tarnish, while the bronze color will remain.
• the sum of the proportions of copper, tin and gold is > 99.95 percent by weight of the bronze alloy, the high purity of the bronze alloy with these three components makes it particularly skin-friendly. This means that jewelry made of this bronze alloy is particularly comfortable to wear on a person's skin without causing irritation and is highly compatible with the body.
• the sum of the proportions of copper, tin and gold is 99.99 percent by weight of the bronze alloy, which leads to a particularly high body compatibility, since only non-toxic metals are used.
• a particularly high level of body compatibility is achieved when the copper component of the bronze alloy has a purity of ⁇ 99.99 and is therefore a metal of the highest purity.
• the tin component of the bronze alloy has a purity of ⁇ 99.99 and is therefore a metal of the highest purity.
• the gold component of the bronze alloy has a purity of ⁇ 99.99 and is therefore a metal of the highest purity.

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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)

Applications Claiming Priority (1)

Publications (2)

Family

ID=91375193

Family Applications (1)

Country Status (3)

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• 2023
  • 2023-06-07 DE DE102023115082.0A patent/DE102023115082B3/de active Active
• 2024
  • 2024-05-23 JP JP2024083986A patent/JP2024177089A/ja active Pending
  • 2024-05-29 EP EP24000061.2A patent/EP4474505A3/fr not_active Withdrawn

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