EP0678586A1 - Alliage cuivre-manganèse-aluminium et son utilisation - Google Patents

Alliage cuivre-manganèse-aluminium et son utilisation Download PDF

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Publication number
EP0678586A1
EP0678586A1 EP94106107A EP94106107A EP0678586A1 EP 0678586 A1 EP0678586 A1 EP 0678586A1 EP 94106107 A EP94106107 A EP 94106107A EP 94106107 A EP94106107 A EP 94106107A EP 0678586 A1 EP0678586 A1 EP 0678586A1
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EP
European Patent Office
Prior art keywords
alloy according
copper alloy
copper
production
maximum
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.)
Granted
Application number
EP94106107A
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German (de)
English (en)
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EP0678586B1 (fr
Inventor
Andreas Dr. rer. nat. Bögel
Harald Dressel
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
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Wieland Werke AG
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Publication date
Application filed by Wieland Werke AG filed Critical Wieland Werke AG
Priority to DE59403559T priority Critical patent/DE59403559D1/de
Priority to EP94106107A priority patent/EP0678586B1/fr
Priority to DK94106107T priority patent/DK0678586T3/da
Priority to ES94106107T priority patent/ES2106400T3/es
Publication of EP0678586A1 publication Critical patent/EP0678586A1/fr
Application granted granted Critical
Publication of EP0678586B1 publication Critical patent/EP0678586B1/fr
Priority to GR970402365T priority patent/GR3024722T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C22C9/05—Alloys based on copper with manganese as the next major constituent

Definitions

  • the invention relates to a copper-manganese-zinc-aluminum alloy with increased resistance to stress corrosion cracking.
  • CuMnZn alloys have been known for a long time (see, for example, FR-PS 967.018). However, these alloys have always played only a subordinate role in their technical use, until only recently the extraordinarily good properties of this alloy system have been used for the manufacture of spectacle parts (cf. for example DE-PS 4.140.262). Soon in 1973 it was pointed out (cf., for example, Tyler et al. In “Journal of Metals", Volume 25, 1973, pp. 24-29) that these materials may represent alternatives to the nickel silver alloys, but that they can be used their susceptibility to stress corrosion cracking is limited.
  • the susceptibility to stress corrosion cracking can be counteracted in that, in addition to preventing the entry of the corrosive medium, the internal stresses in the semi-finished or finished part made from these alloys are reduced or completely removed by suitable measures. Measures of mechanical relaxation and heat treatment are common for this. While mechanical relaxation is usually limited to semi-finished products, heat treatment is suitable for the treatment of both semi-finished and finished parts. A corresponding heat treatment for the purpose of reducing the susceptibility to stress corrosion cracking has been described in US Pat. No. 3,880,678 for CuMnZn alloys. It is obvious that everyone additional measure in the manufacture of desired finished parts, which are not susceptible to stress corrosion cracking, increases the cost of manufacture.
  • the invention is therefore based on the object of eliminating the typical sensitivity to stress corrosion cracking in this alloy system without additional measures for protection against stress corrosion cracking being necessary in the production of semifinished products or finished parts from this alloy.
  • Such a task can be achieved, for example, by trying to influence the characteristics of the material in the desired manner by adding further alloying elements. In many cases, however, it is found that the addition of certain elements achieves the intended purpose, but other properties change in an undesirable manner.
  • the favorable properties of the CuMnZn alloys that is to say the excellent processing properties such as cold formability and, in particular, deep-drawing, should at least be maintained.
  • the task is surprisingly solved by a copper-manganese-zinc-aluminum alloy consisting of 10-20% manganese, 5-15% zinc, 0.5-2.5% aluminum, the rest copper and usual impurities (the% - Specifications relate to the weight).
  • the composition is entered in the concentration triangle according to the figure.
  • FR-PS 967.018 recommends limiting the aluminum content to a maximum of 0.5%.
  • FR-PS 918.446 contains an aluminum additive with a higher zinc content described. Compared to the alloy composition according to DE-PS 4.140.262, there is in particular a targeted selection.
  • Preferred additives according to claims 2 to 7 serve in particular to improve the general pourability and machinability and to improve the fine grain.
  • Chip-breaking additives according to claims 8 and 9 improve the possibility of using semi-finished products made of the alloy according to the invention in machining.
  • Claims 10 to 12 relate to preferred copper contents of the alloy according to the invention.
  • the alloy according to the invention is particularly suitable for the production of objects which are produced by deep-drawing operations or with cold forming, for example by embossing, such as, for example, B. buttons, buckles, hollow goods, stamps, cutlery.
  • the alloy according to the invention is suitable for the production of articles of daily use which have hitherto typically been produced from CuNiZn alloys.
  • the alloy has - if at all - low nickel contents and is therefore a substitute material for nickel silver-triggering nickel allergy materials (cf. claims 14/15/16).
  • Alloys 1-8 listed in the following table were melted from copper cathodes, pure aluminum, fine zinc and CuMn master alloy with 50% by weight Mn and cast into blocks of approx. 3.5 kg weight.
  • the machined cast blocks were rolled at 700 - 740 ° C with a 60% decrease in cross-section into strips 11 mm thick. After machining on all sides, the 10 mm thick strips were rolled to 0.8 mm thick and soft annealed at 600 ° C. Thereafter, rolling was continued to a thickness of 0.4 mm.
  • strip sections of each alloy were soft-annealed at 540 ° C and the tendency to tip formation was determined in the well test method according to DIN 50155.
  • results are shown in the table. From each of the remaining hard-rolled strips, 20 samples were bent into loops and 20 additional samples were relaxed at 250 ° C. for 3 hours and then also formed into loop samples. The loop samples were all stored in a closed vessel over a 5% ammonia solution for 16 h and examined for cracks or breaks at the end of the test period. With this method, the tendency to stress corrosion cracking is examined (previously standardized according to DIN 50908). The greater the number of failures, the higher the susceptibility to stress corrosion cracking. The results are given in the table as% failure rates based on the number of samples. No.
  • Alloys 5 to 8 according to the invention prove to be remarkably improved with regard to their susceptibility to stress corrosion cracking compared to materials 1-4 not doped with Al.
  • the Al doping does not result in any significant changes compared to the undoped materials.
  • deep drawability and stress corrosion cracking resistance are optimized against each other. It can be seen, however, that the deep-drawability decreases with increasing Al contents due to the increasing strength and inclination, but the resistance to stress corrosion cracking is not further improved at contents which are significantly higher than 2.5%.
  • at low alloy contents below 0.5% by weight there is no longer any significant improvement in the stress corrosion cracking resistance.
  • an optimal combination between stress corrosion cracking resistance and deep drawing suitability can be achieved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Cookers (AREA)
EP94106107A 1994-04-20 1994-04-20 Utilisation d'un alliage cuivre-manganèse-aluminium Expired - Lifetime EP0678586B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59403559T DE59403559D1 (de) 1994-04-20 1994-04-20 Verwendung einer Kupler-Mangan-Zink-Aluminium-Legierung
EP94106107A EP0678586B1 (fr) 1994-04-20 1994-04-20 Utilisation d'un alliage cuivre-manganèse-aluminium
DK94106107T DK0678586T3 (da) 1994-04-20 1994-04-20 Anvendelse af en kobber-mangan-zink-aluminiumlegering
ES94106107T ES2106400T3 (es) 1994-04-20 1994-04-20 Empleo de una aleacion de cobre-manganeso-zinc-aluminio.
GR970402365T GR3024722T3 (en) 1994-04-20 1997-09-16 Copper-manganese-aluminium alloy and its use.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94106107A EP0678586B1 (fr) 1994-04-20 1994-04-20 Utilisation d'un alliage cuivre-manganèse-aluminium

Publications (2)

Publication Number Publication Date
EP0678586A1 true EP0678586A1 (fr) 1995-10-25
EP0678586B1 EP0678586B1 (fr) 1997-07-30

Family

ID=8215877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106107A Expired - Lifetime EP0678586B1 (fr) 1994-04-20 1994-04-20 Utilisation d'un alliage cuivre-manganèse-aluminium

Country Status (5)

Country Link
EP (1) EP0678586B1 (fr)
DE (1) DE59403559D1 (fr)
DK (1) DK0678586T3 (fr)
ES (1) ES2106400T3 (fr)
GR (1) GR3024722T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911419A1 (fr) * 1997-10-21 1999-04-28 Ykk Corporation Alliage de cuivre,exempt de nickel
EP1045042A1 (fr) * 1999-04-16 2000-10-18 Ykk Corporation Alliage de cuivre blanc, exempt de nickel
EP1061148A1 (fr) * 1999-06-17 2000-12-20 Ykk Corporation Alliage de cuivre blanc sans nickel
EP1319728A1 (fr) * 2001-12-14 2003-06-18 YKK Corporation Alliage de cuivre pour fermetures à glissière présentant une excellente coulabilité en continu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014851A1 (de) 2011-09-22 2013-03-28 Kme Germany Gmbh & Co. Kg Kupferwerkstoff für die Herstellung eines silberfarbigen Produktes mit einer antimikrobiellen Oberfläche

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR918446A (fr) * 1945-12-06 1947-02-07 New Jersey Zinc Co Alliages métalliques
US3297437A (en) * 1963-02-13 1967-01-10 Lips Nv Copper base alloys containing manganese and aluminium
DE1256426B (de) * 1961-06-13 1967-12-14 Lips Nv Kupferlegierung hoher Kerbschlagzaehigkeit und sehr guter Korrosionsbestaendigkeit, insbesondere in im turbulenten Zustand befindlichen Meerwasser
JPS54132424A (en) * 1978-04-06 1979-10-15 Mitsubishi Metal Corp White copper alloy for architecture and decorative technical art
DD159552A2 (de) * 1980-12-06 1983-03-16 Peter Ruddeck Mangan-aluminium-mehrstoffbronze fuer mittelbeanspruchte konstruktionsteile
DE3427740A1 (de) * 1984-07-27 1986-02-06 Diehl GmbH & Co, 8500 Nürnberg Messinglegierung, herstellungsverfahren und verwendung
EP0238859A2 (fr) * 1986-02-22 1987-09-30 William Prym GmbH & Co. KG Matériau à base de cuivre, résistant à la corrosion et utilisable pour tuyauteries, réservoirs et accessoires pour fluides en circulation, en particulier pour tuyauteries pour eau chaude et/ou froide
EP0545231A1 (fr) * 1991-12-06 1993-06-09 Wieland-Werke Ag Utilisation d'un alliage cuivre-manganèse-zinc pour montures de lunette

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR918446A (fr) * 1945-12-06 1947-02-07 New Jersey Zinc Co Alliages métalliques
DE1256426B (de) * 1961-06-13 1967-12-14 Lips Nv Kupferlegierung hoher Kerbschlagzaehigkeit und sehr guter Korrosionsbestaendigkeit, insbesondere in im turbulenten Zustand befindlichen Meerwasser
US3297437A (en) * 1963-02-13 1967-01-10 Lips Nv Copper base alloys containing manganese and aluminium
JPS54132424A (en) * 1978-04-06 1979-10-15 Mitsubishi Metal Corp White copper alloy for architecture and decorative technical art
DD159552A2 (de) * 1980-12-06 1983-03-16 Peter Ruddeck Mangan-aluminium-mehrstoffbronze fuer mittelbeanspruchte konstruktionsteile
DE3427740A1 (de) * 1984-07-27 1986-02-06 Diehl GmbH & Co, 8500 Nürnberg Messinglegierung, herstellungsverfahren und verwendung
EP0238859A2 (fr) * 1986-02-22 1987-09-30 William Prym GmbH & Co. KG Matériau à base de cuivre, résistant à la corrosion et utilisable pour tuyauteries, réservoirs et accessoires pour fluides en circulation, en particulier pour tuyauteries pour eau chaude et/ou froide
EP0545231A1 (fr) * 1991-12-06 1993-06-09 Wieland-Werke Ag Utilisation d'un alliage cuivre-manganèse-zinc pour montures de lunette

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 92, no. 16, 21 April 1980, Columbus, Ohio, US; abstract no. 133678, TAKEUCHI, ISAO ET AL: "White copper alloys for construction and ornament" *
D.E.TYLER ET AL: "MANGANESE IN COPPER BASED ALLOYS", JOURNAL OF METALS - JOM, vol. 25, January 1973 (1973-01-01), NEW YORK US, pages 24 - 29, XP001263204 *
DATABASE WPI 1979 Derwent World Patents Index; AN 85023B *
P. RUDDECK ET AL: "DER EINFLUSS DES LEGIERUNGSELEMENTS ALUMINIUM AUF DEN GEFUEGEAUFBAU UND EIGENSCHAFTEN VON CUAL-GUSSLEGIERUNGEN", GIESSEREITECHNIK, vol. 32, no. 8, 1986, pages 255 - 257 *
P.RUDDECK: "BEITRAG ZUR METALLURGISCHEN HERSTELLUNG UND ZUM EINSATZ HOCHFESTER CUAL-GUSSLEGIERUNGEN", GIESSEREI-RUNDSCHAU, vol. 38, no. 9/10, 1991, pages 17 - 25, XP000472804 *
PATENT ABSTRACTS OF JAPAN vol. 3, no. 157 (C - 068) 22 December 1979 (1979-12-22) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911419A1 (fr) * 1997-10-21 1999-04-28 Ykk Corporation Alliage de cuivre,exempt de nickel
US5997663A (en) * 1997-10-21 1999-12-07 Ykk Corporation Nickel-free copper alloy
CN1075122C (zh) * 1997-10-21 2001-11-21 Ykk株式会社 无镍铜合金
EP1045042A1 (fr) * 1999-04-16 2000-10-18 Ykk Corporation Alliage de cuivre blanc, exempt de nickel
US6340446B1 (en) 1999-04-16 2002-01-22 Ykk Corporation Nickel-free white copper alloy
EP1061148A1 (fr) * 1999-06-17 2000-12-20 Ykk Corporation Alliage de cuivre blanc sans nickel
KR100391053B1 (ko) * 1999-06-17 2003-07-12 와이케이케이 가부시끼가이샤 무-니켈 백동 합금재
EP1319728A1 (fr) * 2001-12-14 2003-06-18 YKK Corporation Alliage de cuivre pour fermetures à glissière présentant une excellente coulabilité en continu

Also Published As

Publication number Publication date
DK0678586T3 (da) 1998-03-09
GR3024722T3 (en) 1997-12-31
EP0678586B1 (fr) 1997-07-30
ES2106400T3 (es) 1997-11-01
DE59403559D1 (de) 1997-09-04

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