EP0369156B1 - Verwendung einer hochgoldhaltigen Legierung für Schmuckwaren - Google Patents

Verwendung einer hochgoldhaltigen Legierung für Schmuckwaren Download PDF

Info

Publication number
EP0369156B1
EP0369156B1 EP89118634A EP89118634A EP0369156B1 EP 0369156 B1 EP0369156 B1 EP 0369156B1 EP 89118634 A EP89118634 A EP 89118634A EP 89118634 A EP89118634 A EP 89118634A EP 0369156 B1 EP0369156 B1 EP 0369156B1
Authority
EP
European Patent Office
Prior art keywords
weight
gold
cobalt
copper
alloy
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.)
Expired - Lifetime
Application number
EP89118634A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0369156A1 (de
Inventor
Lorenz Dr. Berchtold
Ulrich Dr. Dipl.-Ing. Mürrle
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to AT89118634T priority Critical patent/ATE89330T1/de
Publication of EP0369156A1 publication Critical patent/EP0369156A1/de
Application granted granted Critical
Publication of EP0369156B1 publication Critical patent/EP0369156B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to the use of a high gold alloy as a material for jewelry and coins.
  • Jewelry and watch parts are made both by forging by forming and by casting, the parts often also having to be soldered to one another. Therefore, such materials are required to have good formability, good castability in air and good solderability. In addition, these materials must have a decorative color, be scratch and wear-resistant and not cause allergies when they come into contact with human skin. For sufficient wear resistance, the materials must therefore be hardenable after shaping. In addition, they must not contain any toxic components such as Beryllium, and non-allergic components such as Nickel.
  • Top-class gold alloys from the well-known gold-silver-copper alloy system such as Au 92 Ag 4 Cu 4 do not have the hardness and hardenability of 18 to 14-carat gold-silver-copper alloys, but approximate their properties of the soft fine gold.
  • High-quality gold alloys for jewelry and coins with relatively high hardness and hardenability are known in the Gold-Titan system (DE-OS 35 02 914). However, these alloys are very reactive at higher temperatures, are difficult to solder and can only be cast under vacuum.
  • EP-OS 0234 790 describes magnetic alloys for jewelry, which contain 50 to 75% gold, 12 to 40% palladium and 3 to 15% cobalt. The cobalt content influences the magnetic properties.
  • Gold alloys containing up to 80% by weight of gold and containing cobalt are also known for dental applications. From DE-PS 3406 712 a gold alloy with 20 to 65% by weight gold and 0.5 to 15% by weight cobalt is known, which also contains 25 to 65% by weight palladium and also indium and / or zinc.
  • DE-OS 21 36 232 describes a hard gold alloy which is copper-free and can contain 2 to 10% by weight of cobalt, optionally also iron and nickel. Such alloys have a hardness of over 200 kp / mm2 in the hardened state. However, these alloys show no gold color appealing to jewelry.
  • this object is achieved by using an alloy of at least 84% by weight of gold, 1 to 6% by weight of cobalt, 1 to 5.5% by weight of copper and 0 to 4% by weight of silver and / or zinc in addition to impurities caused by production .
  • Gold alloys with 2.5 to 5.5% by weight of cobalt, 1 to 5.5% by weight of copper and 0 to 4% by weight of silver or 0 to 4% by weight of zinc, balance gold and production-related impurities are preferably used.
  • alloys can be melted in the air and cast into parts close to the final shape, are very easy to form and can be soldered. They have an attractive gold color, good wear resistance and are easy to polish. In addition, these alloys can be hardened in the soft-annealed, formed or cast state by hot aging to Vickers hardnesses over 190.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)
  • Eyeglasses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Ceramic Products (AREA)
EP89118634A 1988-10-19 1989-10-06 Verwendung einer hochgoldhaltigen Legierung für Schmuckwaren Expired - Lifetime EP0369156B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118634T ATE89330T1 (de) 1988-10-19 1989-10-06 Verwendung einer hochgoldhaltigen legierung fuer schmuckwaren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835593 1988-10-19
DE3835593A DE3835593C1 (no) 1988-10-19 1988-10-19

Publications (2)

Publication Number Publication Date
EP0369156A1 EP0369156A1 (de) 1990-05-23
EP0369156B1 true EP0369156B1 (de) 1993-05-12

Family

ID=6365457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118634A Expired - Lifetime EP0369156B1 (de) 1988-10-19 1989-10-06 Verwendung einer hochgoldhaltigen Legierung für Schmuckwaren

Country Status (8)

Country Link
EP (1) EP0369156B1 (no)
JP (1) JPH02166244A (no)
AT (1) ATE89330T1 (no)
DE (2) DE3835593C1 (no)
DK (1) DK517189A (no)
ES (1) ES2040434T3 (no)
FI (1) FI894976A0 (no)
NO (1) NO172753C (no)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02197539A (ja) * 1989-01-26 1990-08-06 Tanaka Kikinzoku Kogyo Kk 装飾品用Ｃｏ含有貴金属材料
JPH02225655A (ja) * 1989-02-28 1990-09-07 Agency Of Ind Science & Technol 光沢のある黒色に着色する金合金とその着色法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1175885B (de) * 1964-08-13 Dr. Eugen Dürrwächter DODUCO, Pforzheim Verwendung einer heterogenisierten Gold-Kobalt-Legierung als Werkstoff für elektrische Kontakte mit praktisch keiner Materialwanderung in gleichstromdurchflossenen Schwachstrom-Schaltkreisen mit in bestimmten Grenzen liegender Selbstinduktion
US2164938A (en) * 1938-08-23 1939-07-04 Metals & Controls Corp Alloy
US2141157A (en) * 1938-08-23 1938-12-20 Metals & Controls Corp Alloy
US2223046A (en) * 1938-12-02 1940-11-26 Metals & Controls Corp Alloy
DE2136232A1 (de) * 1971-07-20 1973-02-01 Degussa Harte goldlegierung fuer zahnaerztliche zwecke
GB1491155A (en) * 1976-04-07 1977-11-09 Fulmer Res Inst Ltd Gold alloys
GB2138027B (en) * 1983-04-12 1986-09-10 Citizen Watch Co Ltd A process for plating an article with a gold-based alloy and an alloy therefor
JPS62185846A (ja) * 1986-02-07 1987-08-14 Citizen Watch Co Ltd 金−白金−コバルト系永久磁石合金

Also Published As

Publication number Publication date
JPH02166244A (ja) 1990-06-26
FI894976A0 (fi) 1989-10-19
ATE89330T1 (de) 1993-05-15
NO893393L (no) 1990-04-20
DE58904343D1 (de) 1993-06-17
NO172753C (no) 1993-09-01
NO172753B (no) 1993-05-24
DK517189A (da) 1990-04-20
DK517189D0 (da) 1989-10-18
NO893393D0 (no) 1989-08-23
DE3835593C1 (no) 1989-11-16
ES2040434T3 (es) 1993-10-16
EP0369156A1 (de) 1990-05-23

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