EP2432904A1 - Palladium jewelry alloy - Google Patents
Palladium jewelry alloyInfo
- Publication number
- EP2432904A1 EP2432904A1 EP10719009A EP10719009A EP2432904A1 EP 2432904 A1 EP2432904 A1 EP 2432904A1 EP 10719009 A EP10719009 A EP 10719009A EP 10719009 A EP10719009 A EP 10719009A EP 2432904 A1 EP2432904 A1 EP 2432904A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- palladium
- alloy according
- ruthenium
- gallium
- 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
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000000956 alloy Substances 0.000 title claims abstract description 99
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 98
- 229910052763 palladium Inorganic materials 0.000 title claims abstract description 61
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 32
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 31
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 30
- 239000010937 tungsten Substances 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 229910052709 silver Inorganic materials 0.000 claims abstract description 22
- 239000004332 silver Substances 0.000 claims abstract description 22
- 239000010948 rhodium Substances 0.000 claims abstract description 20
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 19
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 19
- 239000011701 zinc Substances 0.000 claims abstract description 19
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 15
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052738 indium Inorganic materials 0.000 claims abstract description 15
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 15
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 14
- 239000010941 cobalt Substances 0.000 claims abstract description 14
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 21
- 230000005484 gravity Effects 0.000 claims description 7
- 230000008018 melting Effects 0.000 description 13
- 238000002844 melting Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 9
- 238000009749 continuous casting Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 229910001252 Pd alloy Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010938 white gold Substances 0.000 description 4
- 229910000832 white gold Inorganic materials 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001085205 Prenanthella exigua Species 0.000 description 1
- 238000007545 Vickers hardness test Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 platinum metals Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229910000923 precious metal alloy Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C22C5/04—Alloys based on a platinum group metal
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
Definitions
- the invention relates in the first place to new palladium jewelery alloys and semi-finished products produced with the aid of these alloys.
- Palladium is an element from the group of so-called platinum metals. It is bright white like platinum, but much lighter than platinum and much harder. It is usually much cheaper than platinum.
- palladium has been used primarily as an additive to other elements, especially gold.
- palladium is often used as an alloying additive in the "decolorization" of gold to so-called white gold or gray gold.
- the invention has the object to provide for jewelry other palladium alloys available.
- such alloys should be suitable for the production of pipes and rings for the production of wedding rings.
- a hardness of at least 180 HV (Vickers hardness) is usually sought.
- the new palladium jewelery alloy comprises 58.0% by weight to 76.5% by weight of palladium (Pd), 0.5% by weight to 41.5% by weight of silver (Ag) and / or copper (Cu), 0.1 wt.% to 15.0 wt.% of at least one element selected from the group gallium (Ga), germanium (Ge) and indium (In), and 0.1 wt. % to 10.0% by weight of zinc (Zn).
- the palladium content defines the fineness of the claimed jewelery alloy.
- the addition of silver or copper influences the forming properties and the color tone of the alloy.
- the addition of gallium, germanium and / or indium has an influence on the hardness and the melting point of the alloy.
- the influence of the addition of zinc on the alloy has a positive effect on forming properties and hardness.
- the jewelery alloy according to the invention additionally comprises 0.05% by weight to 5.0% by weight of tungsten (W) and / or cobalt (Co).
- W tungsten
- Co cobalt
- the jewelery alloy according to the invention additionally comprises from 0.001% by weight to 1.0% by weight of at least one element selected from the group consisting of iridium (Ir), rhodium (Rh) and ruthenium (Ru).
- Ir iridium
- Rh rhodium
- Ru ruthenium
- silver contents between 10.0 wt .-% and 32.0 wt .-% are preferred with respect to the silver content.
- silver contents of between 10.0% by weight and 20.0% by weight, on the one hand, or between 23.0% by weight and 32.0% by weight, on the other hand, are particularly noteworthy.
- copper contents of between 3.0% by weight and 15.0% by weight are preferred with respect to the copper content of all of the abovementioned jewelery alloys according to the invention. Within this range, copper contents between 3.0% by weight and 8.0% by weight, on the one hand, or between 8.0% by weight and 15.0% by weight, on the other hand, should be particularly emphasized.
- the elements gallium, germanium and / or indium contained in the jewelery alloy according to the invention are known as so-called melting point depressants, ie by adding such elements, the melting point can be lowered compared to alloys. which do not contain these elements. In addition, these elements can increase the hardness of the resulting alloys.
- the content of gallium, germanium and / or indium jewelery alloys according to the invention is preferably 0.1% by weight to 3.0% by weight, in particular 0.5% by weight to 2.0% by weight. , Within the latter range, contents between 0.8% by weight and 1.6% by weight are to be emphasized.
- At least gallium is contained in said group of elements (gallium, germanium and indium), preferably only gallium is provided as such additive in the alloy.
- the zinc content of the jewelery alloys according to the invention is preferably 0.5 wt .-% to 4.0 wt .-%, in particular 1, 0 wt .-% to 3.0 wt .-%. Within the last-mentioned range, zinc contents of between 1.2% by weight and 2.5% by weight are to be particularly emphasized.
- the content of tungsten and / or cobalt is preferably 0.1 wt .-% to 2.0 wt .-%, in particular 0.1 wt .-% to 1, 0 wt .-% in the jewelery alloys according to the invention. Within the last-mentioned range, contents of tungsten and / or cobalt between 0.2% by weight and 0.6% by weight are to be particularly emphasized.
- the element from the group tungsten and cobalt is preferably tungsten.
- preferred embodiments of the invention contain at least one element from the group of iridium, rhodium and ruthenium.
- Such elements are, as also already known as grain refiners, because they can ensure that the resulting alloy has a lower average grain size compared to alloys that do not contain these elements.
- the content of iridium, rhodium and / or ruthenium from 0.02 wt .-% to 1, 0 wt .-%, in particular 0.02 wt .-% to 0.2 wt .-% is.
- contents of iridium, rhodium and / or ruthenium of between 0.02% by weight and 0.08% by weight should be further emphasized.
- ruthenium of the three mentioned elements iridium, rhodium and ruthenium is present, preferably only ruthenium is provided as such an additive.
- iridium 0.04 wt .-% to 0.06 wt .-% iridium, rhodium and / or ruthenium, preferably ruthenium.
- such a jewelery alloy consists of 58.5 wt .-% palladium, 27.85 wt .-% silver, 10.8 wt .-% copper, 1, 0 wt .-% gallium, 1, 5 wt .-% zinc , 0.3 wt.% Tungsten and 0.05 wt.% Ruthenium.
- tungsten 0.3 wt .-% to 0.6 wt .-% tungsten and / or cobalt, preferably tungsten, and
- iridium 0.04 wt .-% to 0.06 wt .-% iridium, rhodium and / or ruthenium, preferably ruthenium.
- such a jewelery alloy consists of 60.0% by weight of palladium, 27.75% by weight of silver, 8.7% by weight of copper, 1, 0 wt .-% gallium, 2.0 wt .-% zinc, 0.5 wt .-% tungsten and 0.05 wt .-% ruthenium.
- gallium 1.4% by weight to 1.6% by weight of gallium, germanium and / or indium, preferably gallium,
- tungsten 0.2 wt .-% to 0.4 wt .-% tungsten and / or cobalt, preferably tungsten, and
- iridium 0.04 wt .-% to 0.06 wt .-% iridium, rhodium and / or ruthenium, preferably ruthenium.
- such a jewelery alloy consists of 75.0% by weight of palladium, 15.25% by weight of silver,
- the jewelery alloy according to the invention preferably has a specific gravity ⁇ 12.0 g / cm 3 , in particular ⁇ 11.5 g / cm 3 .
- such preferred alloys according to the invention are comparatively lightweight and therefore inexpensive materials.
- known 585 white gold alloys with palladium have, for example, a specific gravity of 14.3 g / cm 3 and known 750 white gold alloys with palladium even have a specific gravity of 15.9 g / cm 3 .
- the palladium jewelery alloy according to the invention may have a melting interval below 1250 ° C.
- such melting intervals are between 1140 0 C and 1220 0 C.
- alloys in particular the alloys used in the jewelry industry, no sharp melting points, but a melting range, the so-called melting interval possess. Within this melting interval, the alloys initially soften until they increasingly liquefy and then change to the actual liquid state. For the processing of such alloys, it is therefore advantageous if such melting intervals are as low as possible, so that they can be easily melted and processed further.
- the invention comprises a semifinished product for jewelery production, which is at least partially, preferably completely, made of an alloy according to the invention.
- these semi-finished products are prefabricated geometric shapes made of the corresponding alloy material, which are then artificially o which are further processed industrially to the respective jewelery end products.
- such semi-finished products are generally for example pipes, rods, rings, sheets, strips, wires and the like. They are first produced as a semi-finished cast product and then processed further to the final semi-finished product with the desired dimensions, preferably reshaped.
- the semifinished products according to the invention are tubular or annular semi-finished products.
- Such semi-finished products are particularly suitable for the production of jewelry rings including wedding rings.
- the invention as a whole is associated with a whole series of advantages.
- the palladium jewelery alloys according to the invention have a beautiful gray-white color with high color stability. Since the alloys are very tarnish-resistant, rhodium plating (rhodium plating) is not required unless desirable for purely aesthetic reasons.
- rhodium plating is known to be a chemical or galvanic coating of metals with rhodium. Such coatings are chemically and mechanically very stable and have a chrome-like gloss.
- the alloys according to the invention have a high ductility, ie the material has a high formability before it breaks or tears.
- the alloys according to the invention have a fine-grained microstructure, for example with average particle sizes of less than 50 ⁇ m, in particular in the range from 20 to 35 ⁇ m. Accordingly, they can be used with both hand tools and machine tools. conditions, for example, with all common CNC (computerized numerical control) techniques, editable. This also applies to conventional inserts and diamond tools, including PCD (polycrystalline diamond).
- the alloys according to the invention curing of at least 180 HV (Vickers hardness, calcined, ie so-called soft hardness) can readily be achieved, so that such alloys, in particular also having a palladium content of 585 (58.5% by weight), are suitable for the Production of wedding rings are suitable.
- multicolored wedding rings can also be produced using the jewelery alloys according to the invention with differently colored alloys, in particular by so-called diffusion welding. In this process, metallic workpieces are joined together and with very high quality welds.
- the process itself and its process parameters are readily known to those skilled in the art.
- the alloys according to the invention can not only be processed by diffusion bonding, but also have a hardness of at least 180 HV (without deformation).
- the specific gravity of the alloys of the invention with, in particular less than 12.0 g / cm 3, preferably less than 1 1, 5 g / cm 3 clearly below the specific gravities of alloys of other metals comparable fineness lies.
- the use of palladium as a (main) alloying element makes the alloys according to the invention significantly cheaper than alloys having comparable fineness, for example to platinum.
- the alloys of the present invention provide a low cost alternative to, for example, white gold alloys 585 gold content, wherein the alloys of the invention can also be used in combination with such alloys.
- the alloys according to the invention can be produced in the conventional continuous casting process.
- Continuous casting is known to the person skilled in the art as a method for the production of semi-finished products from metals and alloys, whereby this method is generally carried out continuously, so that an endless strand of the desired semifinished product is provided.
- the melting intervals of the alloys according to the invention are generally below 1250 ° C., they can be melted and processed in a simple manner with such a process.
- the molten material In continuous casting, the molten material must be sufficiently fluid for a period of time to convert the material into the strand. Too early solidification of the material must be prevented.
- a palladium alloy according to the invention is produced which, based on the total weight 1000 (in% o), has a fineness of palladium of 585.
- the individual components are as follows:
- this alloy according to the invention thus has the composition:
- the resulting alloy has a melting interval between 1145 0 C and 1220 0 C and can be processed accordingly in a continuous casting process to semi-finished products, in particular to pipes and rings.
- the hardness of the alloy is annealed (at 850 0 C) 180 HV to 200 HV.
- the alloy has a specific gravity of 10.9 g / cm 3 .
- the alloy is fine-grained (mean grain size below 50 ⁇ m) and can be excellently machined (turning and milling) as well as forming, diffusion welding and polishing.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Adornments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009022357A DE102009022357A1 (en) | 2009-05-18 | 2009-05-18 | Palladium jewelery alloy |
PCT/EP2010/056751 WO2010133555A1 (en) | 2009-05-18 | 2010-05-17 | Palladium jewelry alloy |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2432904A1 true EP2432904A1 (en) | 2012-03-28 |
EP2432904B1 EP2432904B1 (en) | 2016-07-06 |
Family
ID=41397235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10719009.2A Not-in-force EP2432904B1 (en) | 2009-05-18 | 2010-05-17 | Palladium jewelry alloy |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2432904B1 (en) |
JP (1) | JP2012527529A (en) |
KR (1) | KR20120008073A (en) |
DE (2) | DE102009022357A1 (en) |
WO (1) | WO2010133555A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5948551B2 (en) * | 2013-02-12 | 2016-07-06 | 山梨県 | Alloy for jewelry |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2222544A (en) * | 1938-10-19 | 1940-11-19 | Chemical Marketing Company Inc | Formed piece of silver palladium alloys |
US3819366A (en) * | 1969-03-21 | 1974-06-25 | Aurium Res Corp | Dental alloy |
DE2440425C3 (en) * | 1974-08-23 | 1979-11-15 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Low-gold precious metal alloys for firing porcelain for dental purposes |
US4419325A (en) * | 1982-07-21 | 1983-12-06 | Jeneric Industries, Inc. | Dental alloys for porcelain-fused-to-metal restorations |
JPS6029436A (en) * | 1983-07-28 | 1985-02-14 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
DE3418050A1 (en) * | 1984-01-13 | 1985-07-25 | Jeneric Industries, Inc., Wallingford, Conn. | Fine-grained dental alloys for porcelain facings based on palladium |
US4576789A (en) * | 1984-01-13 | 1986-03-18 | Jeneric Industries, Inc. | Grain-refined gold-free dental alloys for porcelain-fused-to-metal restorations |
JPS60159139A (en) * | 1984-01-27 | 1985-08-20 | Tokuriki Honten Co Ltd | Sliding contact material |
DE3522523C1 (en) * | 1985-06-24 | 1986-12-18 | Degussa Ag, 6000 Frankfurt | Use of silver-free palladium alloys for firing dental ceramics |
EP0267318A3 (en) * | 1986-11-13 | 1989-01-11 | C. HAFNER GmbH & Co. | Alloy for ornamental purposes |
DE3642474A1 (en) * | 1986-12-12 | 1988-06-23 | Degussa | USE OF PALLADIUM ALLOYS FOR THE PRODUCTION OF DENTAL REPLACEMENT |
ES2054891T3 (en) * | 1988-02-27 | 1994-08-16 | Degussa | USE OF PALADIO-SILVER ALLOYS FOR THE PRODUCTION OF DENTAL PROSTHESES. |
KR20040060930A (en) * | 2001-10-01 | 2004-07-06 | 상드르 에 메토 소시에떼아노님 | Dental alloy with silver content |
WO2008053559A1 (en) * | 2006-11-02 | 2008-05-08 | Lapis | GOLDEN Pd-In ALLOYS |
-
2009
- 2009-05-18 DE DE102009022357A patent/DE102009022357A1/en not_active Ceased
- 2009-05-18 DE DE202009013204U patent/DE202009013204U1/en not_active Expired - Lifetime
-
2010
- 2010-05-17 EP EP10719009.2A patent/EP2432904B1/en not_active Not-in-force
- 2010-05-17 KR KR1020117029961A patent/KR20120008073A/en not_active Application Discontinuation
- 2010-05-17 JP JP2012511250A patent/JP2012527529A/en active Pending
- 2010-05-17 WO PCT/EP2010/056751 patent/WO2010133555A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010133555A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2432904B1 (en) | 2016-07-06 |
DE102009022357A1 (en) | 2010-11-25 |
JP2012527529A (en) | 2012-11-08 |
KR20120008073A (en) | 2012-01-25 |
DE202009013204U1 (en) | 2009-12-03 |
WO2010133555A1 (en) | 2010-11-25 |
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