EP1521858A1 - Alloy, especially for spectacle frames - Google Patents
Alloy, especially for spectacle framesInfo
- Publication number
- EP1521858A1 EP1521858A1 EP03763780A EP03763780A EP1521858A1 EP 1521858 A1 EP1521858 A1 EP 1521858A1 EP 03763780 A EP03763780 A EP 03763780A EP 03763780 A EP03763780 A EP 03763780A EP 1521858 A1 EP1521858 A1 EP 1521858A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- wire
- hardness
- metal parts
- alloy according
- 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.)
- Withdrawn
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
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- 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
Definitions
- the invention relates to an alloy, in particular for eyeglass frames, jewelry and for other metal parts to be worn on the body or attached to clothing and touching the body. Furthermore, the invention relates to eyeglass frames, jewelry and metal parts for garments which are produced using the alloy, as well as intermediate products and materials, such as in particular a wire, band or rod material, produced using such an alloy.
- the wire used to manufacture the eyeglass frame consists of a nickel-free alloy.
- the nickel-free wire used also meets the mechanical requirements placed on an eyeglass frame, as do conventional nickel-containing alloy wires, such as, for example, wires made of nickel silver alloys.
- a wire made of a nickel-free alloy should have at least a comparable deformability in order to enable the spectacle frames to be produced inexpensively.
- An alloy is already known from DE 100 43 278 AI which fulfills the above requirement profile and in particular also has a hardness which satisfies the requirements of an eyeglass frame even in a deformation range greater than 70%.
- the present invention is based on the object of proposing a nickel-free, easily deformable alloy which, compared to the known alloys used in particular in the manufacture of eyeglass frames, has an even further improved deformability and generally improved processability and thus an even more cost-effective production of corresponding metal parts , in particular glasses frames, allows.
- the nickel-free alloy according to the invention has a degree of deformation which can be greater than 80%, good solderability and good cutting, stamping and embossing properties.
- the good solderability is achieved in particular because the alloy according to the invention enables a soldering process without the use of flux due to its alloy composition.
- the use of an inductive soldering process using protective gas has proven to be particularly advantageous.
- the good cutting, punching and embossing properties of the alloy according to the invention are due to the special ductility of the alloy plant. Material which, for example, enables material edges to be trimmed without a large proportion of breakage, so that cut edges are essentially formed by shearing off. In this way, clean cut edges can be produced in a simple manner, so that only a little polishing is required for post-processing.
- the alloy material according to the invention has a hardness sufficient for good polishability.
- the properties of the alloy according to the invention thus result in properties comparable to those of nickel silver alloys, so that it is possible to process corresponding alloy materials, in particular a corresponding alloy wire, on conventional machines using the tools known from processing nickel silver alloys without changing essential machine parameters would. This has an advantageous effect on the cost-effective production of corresponding products.
- a particular advantage of the alloy according to the invention is that, despite the aforementioned positive processing properties, spring behavior can be achieved with a wire produced using the alloy according to the invention, which enables the manufacture of eyeglass frames with good spring-back properties and thus good suitability for everyday use.
- composition according to claim 2 has a particularly advantageous embodiment of the alloy.
- the alloy according to the invention serves as a material for a spectacle frame, the aforementioned advantages which can be achieved by using the material can be used to a particularly large extent.
- Fig. 1 is a hardness-deformation diagram with comparative
- FIG. 2b shows a table of values relating to the diagram shown in FIG. 2a;
- 3a shows a strength / hardness-temperature diagram relating to the above-mentioned alloy
- 3b shows a table of values relating to the diagram in FIG. 3a.
- CuSnl 2Zn2 shows the hardness curve marked E for an embodiment of the wire alloy, which is referred to below as CuSnl 2Zn2.
- the alloy CuSnl 2Zn2 has 12% Sn, 2, 1% Zn, 0.008% Mn, 0.002% P, 0.003% Fe and the rest copper.
- the graph labeled S shows the hardness curve of a nickel silver alloy with 18% nickel.
- alloy E has greater hardness over the entire deformation range going beyond 80%.
- FIG. 2a shows the hardening of the CuSnl 2Zn2 alloy as a function of the deformation, the underlying one, which is shown in FIG. 2b shows the table of values in addition to the wire diameter achieved in the course of the deformation and the values of strength and hardness shown in FIG. 2a, the respective cross-sectional reduction [QV] and the respective ductility for a given diameter.
- FIG. 3a shows the recrystallization with the resulting values of strength and hardness over the temperature curve.
- the table of values shown in FIG. 3b, on which FIG. 3a is based, has, in addition to the wire diameter of the alloy wire CuSnl2Zn2 and the values of strength and hardness shown in FIG. 3a, the ductility of the alloy material resulting from the recrystallization.
- the alloy production of the alloy CuSnl 2Zn2 takes place from the alloy components mentioned at the beginning by melting at temperatures from 900 ° C. to 1000 ° C.
- a semifinished product is produced by a continuous casting of extrudates with a strand diameter of 12 mm to 14 mm or, for example, also with a diameter of 65 mm to 85 mm, which is reduced to the aforementioned strand diameter of 12 mm to 14 mm by a subsequent extrusion made available for further processing for wire production. In the course of a gradual diameter reduction by cold rolling, the diameter is reduced to, for example, 8 mm.
- the wire blank produced in this way is subsequently subjected to an annealing treatment in a protective gas atmosphere at temperatures of 500 ° C.
- a surface treatment e.g. by pickling the wire, in particular to remove any oxide layers.
- the alloy CuSnl 2Zn2 which is particularly suitable for the manufacture of eyeglass frames, has a Vickers hardness (HV JO ) of approx. 100 HVio in the soft-annealed state, which increases with increasing deformation. With a degree of deformation of 80%, the Vickers hardness is at least approx. 280 HV I ⁇ - Ie, the hardness can be tripled due to the deformation.
- HV JO Vickers hardness
- the tensile strength is 430 N / mm 2 to 450 N / mm 2 and increases with increasing deformation up to values between 1 100 N / mm 2 and 1 150 N / mm 2 (FIG. 2a).
- the alloy CuSnl 2Zn4 which has 2% more zinc and 2% less copper with an otherwise identical composition to the former alloy, has also proven to be particularly suitable for the manufacture of eyeglass frames.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20211557U | 2002-07-12 | ||
DE20211557U DE20211557U1 (en) | 2002-07-12 | 2002-07-12 | Alloy, especially for eyeglass frames |
PCT/EP2003/007458 WO2004007783A1 (en) | 2002-07-12 | 2003-07-10 | Alloy, especially for spectacle frames |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1521858A1 true EP1521858A1 (en) | 2005-04-13 |
Family
ID=7973566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03763780A Withdrawn EP1521858A1 (en) | 2002-07-12 | 2003-07-10 | Alloy, especially for spectacle frames |
Country Status (7)
Country | Link |
---|---|
US (1) | US20060104852A1 (en) |
EP (1) | EP1521858A1 (en) |
KR (1) | KR20050035861A (en) |
CN (1) | CN100362121C (en) |
AU (1) | AU2003257443A1 (en) |
DE (1) | DE20211557U1 (en) |
WO (1) | WO2004007783A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4131426A1 (en) * | 1991-09-20 | 1993-03-25 | Berkenhoff Gmbh | ALLOY, ESPECIALLY FOR USE FOR THE PRODUCTION OF JEWELRY, EYE GLASSES ETC. |
US5330712A (en) * | 1993-04-22 | 1994-07-19 | Federalloy, Inc. | Copper-bismuth alloys |
US5820701A (en) * | 1996-11-07 | 1998-10-13 | Waterbury Rolling Mills, Inc. | Copper alloy and process for obtaining same |
DE19927136C1 (en) * | 1999-06-15 | 2001-03-01 | Wieland Werke Ag | Use of a copper-tin-iron alloy |
DE19927646C5 (en) * | 1999-06-17 | 2006-05-11 | Wieland-Werke Ag | Use of a tin-rich copper-tin-iron alloy |
US6346215B1 (en) * | 1997-12-19 | 2002-02-12 | Wieland-Werke Ag | Copper-tin alloys and uses thereof |
DE10043278A1 (en) * | 2000-09-02 | 2002-03-28 | Berkenhoff Gmbh | Alloy, especially wire for eyeglass frames |
-
2002
- 2002-07-12 DE DE20211557U patent/DE20211557U1/en not_active Expired - Lifetime
-
2003
- 2003-07-10 US US10/520,527 patent/US20060104852A1/en not_active Abandoned
- 2003-07-10 CN CNB038163780A patent/CN100362121C/en not_active Expired - Fee Related
- 2003-07-10 WO PCT/EP2003/007458 patent/WO2004007783A1/en not_active Application Discontinuation
- 2003-07-10 EP EP03763780A patent/EP1521858A1/en not_active Withdrawn
- 2003-07-10 AU AU2003257443A patent/AU2003257443A1/en not_active Abandoned
- 2003-07-10 KR KR1020057000618A patent/KR20050035861A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2004007783A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1668772A (en) | 2005-09-14 |
WO2004007783A1 (en) | 2004-01-22 |
US20060104852A1 (en) | 2006-05-18 |
KR20050035861A (en) | 2005-04-19 |
DE20211557U1 (en) | 2002-09-26 |
AU2003257443A1 (en) | 2004-02-02 |
CN100362121C (en) | 2008-01-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20041218 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20070323 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20090710 |