EP0622468B1 - Verwendung einer Kupfer-Aluminium Legierung zur Herstellung von nickelfreien Gebrauchsgegenständen - Google Patents

Verwendung einer Kupfer-Aluminium Legierung zur Herstellung von nickelfreien Gebrauchsgegenständen Download PDF

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Publication number
EP0622468B1
EP0622468B1 EP19940105831 EP94105831A EP0622468B1 EP 0622468 B1 EP0622468 B1 EP 0622468B1 EP 19940105831 EP19940105831 EP 19940105831 EP 94105831 A EP94105831 A EP 94105831A EP 0622468 B1 EP0622468 B1 EP 0622468B1
Authority
EP
European Patent Office
Prior art keywords
copper
production
nickel
alloy
iron
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
EP19940105831
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0622468A1 (de
Inventor
Hans-Achim Dr.-Ing. Kuhn
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.)
Wieland Werke AG
Original Assignee
Wieland Werke AG
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 Wieland Werke AG filed Critical Wieland Werke AG
Publication of EP0622468A1 publication Critical patent/EP0622468A1/de
Application granted granted Critical
Publication of EP0622468B1 publication Critical patent/EP0622468B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent

Definitions

  • the invention relates to the use of a copper-aluminum alloy with manganese and iron as further constituents for the production of nickel-free everyday objects, in particular glasses, jewelry, cutlery, donrdashery, etc., which do not trigger any allergic reactions.
  • Spectacle parts are to be understood in particular as spectacle arms, spectacle frames, eye edge profiles and spectacle hinges.
  • Nickel-free copper alloys should be able to replace conventional nickel-containing alloys such as nickel silver (such as CuNil8Zn20). This can be achieved if the properties of the alternative nickel-free alloys meet or can be surpassed the requirements that are also placed on the nickel-containing alloys.
  • a good alloy of glasses is sufficient high mechanical strength (tensile strength> 600 MPa, hardness 180 to 300 HV), sufficient softening temperature (after brief annealing for 30 seconds at 650 ° C at least 150 HV), an attractive appearance and good polishability expected. Esp. the softening behavior is of interest since the parts of the glasses should still have residual hardnesses of> 150 HV after connection work with hard solder.
  • the invention is therefore based on the object of proposing a copper alloy for the abovementioned use which, with inexpensive producibility and sufficient mechanical parameters, has no nickel.
  • EP-A-568 094 is a non-ferrous metal alloy for jewelry and metal objects with more than 5.0 to 15.00% Mn, 4.0 to 7.50% Al, 1.0 to 2.80% Fe, the rest Cu known.
  • EP-A-532 929 describes a layer for the production of jewelry and spectacle frames with 86.0 to 90.0% Cu, 2.8 to 4.5% Al, 0.4 to 1.3% Mn, 1.0 up to 2.5% Fe 0 to 0.5% Si, rest Zn known.
  • Alloys of 2 to 10% aluminum, up to about 8% manganese, chromium, iron and / or cobalt, alone or in groups, the rest of copper are known from DE-PS 757,956, but these alloys are used for the production of objects with high Long-term fatigue strength, such as of pipes for preheaters on ships, turbine blades, sea water-cooled mufflers, etc. Like. Used.
  • the alloy can be derived from the known ⁇ / ⁇ multicomponent aluminum bronzes CuA110NiFe (alloy designation according to DIN 17.665) by replacing manganese with the element nickel and reducing aluminum so that there is only an ⁇ -phase structure for further processing of the pressed semi-finished product.
  • Iron is present as Fe particles because of its poor solubility.
  • the alloy can be conventionally continuously cast and hot pressed.
  • Hot-pressed semi-finished products, such as wires can be cold-formed sufficiently well for optical wire production because of the ⁇ -phase-free structure that is always present after the hot-pressing process.
  • Iron has a grain refining effect, so that a smooth surface desirable for optical quality can be drawn.
  • the average grain size in wire sections recrystallized at 700 ° C. is 10 ⁇ m. After temper hardening at 300 to 400 ° C, the softening starts at 500 ° C, but at 700 ° C, residual hardnesses of HV 10 out of 200 are still registered if the annealing time does not exceed 30 seconds. This short-term annealing is intended to simulate the temperature conditions during the connection work with hard solder between 620 and 680 ° C. After 3 hours of annealing at 750 ° C, residual hardnesses of 150 are still measured.
  • the use of a copper alloy according to the compositions according to claims 2 to 4 is recommended.
  • the optional addition of lead is essential for machining in the manufacture of everyday items.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Eyeglasses (AREA)
  • Adornments (AREA)
EP19940105831 1993-04-30 1994-04-15 Verwendung einer Kupfer-Aluminium Legierung zur Herstellung von nickelfreien Gebrauchsgegenständen Expired - Lifetime EP0622468B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4314243 1993-04-30
DE19934314243 DE4314243C1 (de) 1993-04-30 1993-04-30 Verwendung einer Kupfer-Aluminium-Legierung zur Herstellung von nickelfreien Gebrauchsgegenständen

Publications (2)

Publication Number Publication Date
EP0622468A1 EP0622468A1 (de) 1994-11-02
EP0622468B1 true EP0622468B1 (de) 1996-09-11

Family

ID=6486812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940105831 Expired - Lifetime EP0622468B1 (de) 1993-04-30 1994-04-15 Verwendung einer Kupfer-Aluminium Legierung zur Herstellung von nickelfreien Gebrauchsgegenständen

Country Status (4)

Country Link
EP (1) EP0622468B1 (el)
DE (2) DE4314243C1 (el)
DK (1) DK0622468T3 (el)
GR (1) GR3021487T3 (el)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757956C (de) * 1939-09-08 1953-03-23 Finow Kupfer Und Messingwerke Die Verwendung von Kupfer-Aluminium-Legierungen fuer Gegenstaende hoher Warmdauerstandfestigkeit
JPS592130B2 (ja) * 1975-12-03 1984-01-17 タナカキキンゾクコウギヨウ カブシキガイシヤ サンカブツブンサンガタノ デンキセツシヨクブヒンノ セイゾウホウ
US5104457A (en) * 1988-02-23 1992-04-14 Country Club Golf Equipment (Proprietary) Limited Golf clubs and method of making thereof
US4917967A (en) * 1989-01-13 1990-04-17 Avon Products, Inc. Multiple-layered article and method of making same
DE4131426A1 (de) * 1991-09-20 1993-03-25 Berkenhoff Gmbh Legierung, insbesondere zur verwendung zur herstellung von schmuck, brillengestellen etc.
DE4214304A1 (de) * 1992-04-30 1993-11-04 Deutsche Nickel Ag Nickelfreie buntmetallegierung und deren verwendung

Also Published As

Publication number Publication date
EP0622468A1 (de) 1994-11-02
DE59400623D1 (de) 1996-10-17
DE4314243C1 (de) 1994-04-07
GR3021487T3 (en) 1997-01-31
DK0622468T3 (el) 1997-02-24

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