GB2428046A - A silver-copper-zinc-germanium brazing alloy - Google Patents
A silver-copper-zinc-germanium brazing alloy Download PDFInfo
- Publication number
- GB2428046A GB2428046A GB0513985A GB0513985A GB2428046A GB 2428046 A GB2428046 A GB 2428046A GB 0513985 A GB0513985 A GB 0513985A GB 0513985 A GB0513985 A GB 0513985A GB 2428046 A GB2428046 A GB 2428046A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- silver
- solder
- alloys
- copper
- 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- Withdrawn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
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 44
- 239000000956 alloy Substances 0.000 title claims abstract description 44
- 238000005219 brazing Methods 0.000 title claims abstract description 16
- VQWOKSZRTKRGJS-UHFFFAOYSA-N [Ge].[Zn].[Cu].[Ag] Chemical compound [Ge].[Zn].[Cu].[Ag] VQWOKSZRTKRGJS-UHFFFAOYSA-N 0.000 title 1
- 229910052709 silver Inorganic materials 0.000 claims abstract description 28
- 229910000679 solder Inorganic materials 0.000 claims abstract description 22
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004332 silver Substances 0.000 claims abstract description 17
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 14
- 229910052718 tin Inorganic materials 0.000 claims abstract description 8
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 7
- 229910017518 Cu Zn Inorganic materials 0.000 claims abstract description 5
- 229910017752 Cu-Zn Inorganic materials 0.000 claims abstract description 5
- 229910017943 Cu—Zn Inorganic materials 0.000 claims abstract description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010944 silver (metal) Substances 0.000 claims 3
- 229910000898 sterling silver Inorganic materials 0.000 claims 1
- 239000010934 sterling silver Substances 0.000 claims 1
- 239000011701 zinc Substances 0.000 abstract description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 13
- 230000008018 melting Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229910001118 argentium sterling silver Inorganic materials 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 2
- RZJRJXONCZWCBN-UHFFFAOYSA-N octadecane Chemical compound CCCCCCCCCCCCCCCCCC RZJRJXONCZWCBN-UHFFFAOYSA-N 0.000 description 2
- 235000019271 petrolatum Nutrition 0.000 description 2
- 235000013772 propylene glycol Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910017944 Ag—Cu Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910017821 Cu—Ge Inorganic materials 0.000 description 1
- 229910000927 Ge alloy Inorganic materials 0.000 description 1
- 229910000562 Gilding metal Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 244000090125 Solidago odora Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NZWXMOTXTNDNLK-UHFFFAOYSA-N [Cu].[Zn].[Ag] Chemical compound [Cu].[Zn].[Ag] NZWXMOTXTNDNLK-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- -1 e.g. Natural products 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010947 jewellery metal Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229940038384 octadecane Drugs 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 235000019809 paraffin wax Nutrition 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 239000001993 wax 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
- C22C5/06—Alloys based on silver
- C22C5/08—Alloys based on silver with copper as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0227—Rods, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3006—Ag as the principal constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
Abstract
A silver solder or brazing alloy of the Ag-Cu-Zn family comprises (by weight): more than 70 % silver and 0.5-3 % germanium. The alloy preferably contains 3 to less than 8 % zinc. The alloy may also contain 1-3 % tin and/or 0.05-0.4 % silicon. The alloy may be formed into rod, strip, wire or paste and be used to braze silver alloys.
Description
SILVER SOLDER OR BRAZING ALLOYS AND THEIR USE
FIELD OF THE IIVENTION
The present invention relates to silver solder or brazing alloys and to their use in making soldered joints in various grades of silver, particularly silversmithing grades. Silver brazing alloys are also known in the silversmithing trade as silver solders or solders and these tenns are used interchangeably herein.
BACKGROUND TO THE INVENTION
Various silver-based alloys of the silver-copper-zinc type are useful as solders (brazing materials). Brazing has been defined as a joining process in which a filler metal is used which has a melting point of above 450 C, but below that of the parent metal and which is distributed in the joint by capillary attraction.
Silver, copper and zinc form a ternary eutectic with a silver content of 56% and melting at 665 C, see a ternary phase diagram which is given in Fig. 2 of Jacobson et al, Development of new silver-free brazing alloys for steel tubular assembly, supplement to the Welding Journal (sponsored by the American welding Society/Welding Research Council), August 2002, pages 149-S to 155-S downloadable from http://www.aws.org/wj/supplement/08-2002-JACOBSON- p4f,. A commercially supplied silver alloy recommended by the AWS for brazing mild steel or copper has the composition of 44 wt % Ag, 30 wt % Cu and 26 wt % Zn. Such an alloy has too low silver content for use in silversinithing, where solder alloys of at least 55 wt % Ag are the norm.
Depending on their melting temperatures, brazing alloys for use in silversmithing are classified as Easy, Medium and Hard, and the major UK suppliers quote the values below: Thessco Solidus Liquidus Easy 705 C 725 C Medium 720 C 765 C Hard 745 C 778 C Johnson Matthey Solidus Liquidus Easy 705 C 723 C Medium 720 C 765 C Hard 745 C 778 C An alloy containing 75 wt % Ag, 22 wt % Cu and 3 wt % Zn is known and provides a good colour match for silver, but is high melting. An alloy with 70 wt % Ag, 20 wt % Cu and 10 wt % Zn is also of good colour and is lower melting, and a further alloy containing 65 wt % Ag, 20 wt % Cu and 15 wt % Zn is still lower melting, see http:/fwww.wlv.com/joining/silvabrazrefchart.xls. This is, of course, only one web page from one of the various suppliers of solder alloys for silversmiths.
A corrosion-resistant silver solder for use in the electronics industry is disclosed in JP 61078592 (Kyocera) and is based on Ag, 0.05-19 wI %, Ge, 0.01-1.0 wt % Pd, and 0.0 1-2 wt % Li. An exemplified composition contains Ag 94 wt %, Ge 4 wt %, Pd 0.5 wt %, Li 0.5 wt %, Fe 0.5 wt % and Ni 0.5 wt %, and another exemplified composition has Ag 80%, Ge 11.95%, Pd 8% and Li 0.05%.
Recommended amounts of germanium are relatively high. For silversmithing, the use of palladium is to be avoided, as is the use of lithium even in trace amounts.
Although spreadability and wettability are said to be desirable properties, colour match to the material being soldered is not necessary.
Patent GB-B-2255348 (Rateau, Albert and Johns; Metaleurop Recherche) discloses a novel silver alloy that maintains the properties of hardness and lustre inherent in Ag-Cu alloys while reducing problems resulting from the tendency of the copper content to oxidise. The alloys are ternary Ag-Cu-Ge alloys containing at least 92.5 wt% Ag, 0.5-3 wt % Ge and the balance, apart from impurities, copper. Patents US-A-616807l and EP-B-0729398 (Johns) disclose a silver/germanium alloy which comprises a silver content of at least 77 wt % and a germanium content of between 0.4 and 7%, the remainder principally being copper apart from any impurities, which alloy contains elemental boron as a grain refiner at a concentration of greater than 0 ppm. and less than 2Oppm. Silver alloys according to the teaching of GB-B-2255348 and EP-B-0729398 are now commercially available in Europe and in the USA under the trade name Argentium (Ag 92.5 wt%, Cu 6.3 wt%, Ge 1.2 wt %), and the word "Argentium" as used herein refers to these alloys.
WO 2005/051953 (the contents of which are incorporated herein by reference) discloses a silver solder alloy of the Ag-Cu-Zn family containing at least wt % Ag and from 0.5 to 3 wt % Ge. The Ag-Cu-Zn alloy typically contains 55- 77 wt % Ag, 10-30 wt% Cu (preferably 56-75 wt %) and 8-15 wt % Zn. The above alloys can exhibit an advantageous combination of relatively low melting point, high flowability and good colour. In particular, such alloys may have a solidus temperature in the range of about 700 to about 750 C and a liquidus temperature in the range of about 725 C to about 780 C. They can be used for soldering or brazing jewellery metals including grades of silver such as Sterling. They are particularly advantageous for soldering Argentium silver.
SUMMARY OF THE INVENTION
We have now found that solders of the "hard" category can be provided that have unusually high silver contents and correspondingly low zinc contents, and that these exhobit good colour and other properties.
The invention provides silver solders or brazing alloys of the Ag-Cu-Zn family containing more than 7Owt % Ag and from 0.5 to 3 wt% Ge.
DESCRIPTION OF PREFERRED FEATURES
Preferred solders contain 1.0-2.5 wt % Ge especially about 1.5 wt % Ge and optionally may further comprise 1-3 wt % Sn, especially about 1 wt % Sn. They may contain 3 - less than 8 wt% Zn, typically 4 - 5 wt% Zn, and they may further comprise 0.05-0.4 wt % Si e.g. about 0.1 wt% Si. Too large a proportion of Si gives rise to brittleness. It may further comprise an amount of boron of e.g. 1 ppm-0.3 wt % boron, and more typically 0.1-0.3 wt % of boron which reduces grain size and helps in rolling or drawing the composition. An embodiment of the solder contains about 75 wt% Ag, about 18 wt% Cu and about 4.5 wt% Zn, about 1.5 wt% Ge and about 1 wt% Sn.
The alloys of the invention may be provided any form that is convenient for silversmithing, e.g. rod, strip, wire, fine particles or a paste in which powdered metal is suspended in a vehicle, and may be used with conventional fluxes. In the case of pastes, US-A-5443658 (Hermanek) discloses a vehicle which is an aqueous gel containing 78 weight percent water, 10 weight percent mineral oil, 10 weight percent glycerin with the balance sodium carboxymethyl-cellulose. US-A-5 120374 (Mizuhara) discloses gels containing 1-4 wt. % hydroxypropylcellulose, 40- 80 vt.
% 1,2-propanediol, 18-58 wt. % 2-propanol or 1-4 wt. % hydroxypropylcellulose, 20-70 wt. % 1,2-propanediol, 26-76 wt. % water. US-A-4475959 discloses an organic vehicle system based on resins dispersed in hydroxylic solvents. Low- melting hydrocarbon vehicles may also be used. Useful materials include those melting below room temperature to normally solid materials, e.g. Ci- Cico petroleum hydrocarbon waxes melting from 28 C. to 100 C. Such materials should have a low ash or solid residue content and either melt and flow, sublime and/or thermally decompose below 500 C. Useful hydrocarbons may be paraffinic, aromatic, or mixed aromatic paraffinic or mixtures of compounds of such characteristics, and include various mixtures of hydrocarbons, e.g., octadecane, mineral spirits, paraffin wax, and petrolatum (a colloidal system of non-straight-chain solid paraffinic hydrocarbons and high boiling liquid paraffinic hydrocarbons, in which most of the liquid hydrocarbons are held inside the micelles), e. g., Vaseline.
The alloys can be used in any conventional soldering or brazing method e. g. using a hand torch, a fixed burner, induction or resistance heating or using a brazing furnace, preferably such a furnace which provides a protective atmosphere.
The invention is further illustrated in the following examples
Example 1
A brazing composition is prepared by melting together the following materials: Ag - 75% Ge 1.5% Sn - 1.0% Zn - 4.5% Cu - 18%.
The resulting composition is expected to roll well from cast ingot (satisfactory to 40% work hardened, then required annealing) and is a good solder when tested initially on gilding metal samples. The solder composition runs well along a T' join. The observed colour is good. On tarnish testing the present solder appears bright. Its melting point is within the range of "hard" solders for germanium-containing silver alloys.
Claims (15)
1. A silver solder or brazing alloy of the Ag-Cu-Zn family containing more than 70 wt % Ag and from 0.5 to 3 wt% Ge.
2. The alloy of claim 1, containing 1.0-2.5 wt % Ge.
3. The alloy of claim 1, containing about 1.5 wt % Ge.
4. The alloy of any preceding claim, further comprising 1-3 wt % Sn.
5. The alloy of claim 4, comprising about 1 wt % Sn.
6. The alloy of any preceding claim containing 3 - less than 8 wt% Zn
7. The alloy of any preceding claim containing 4 - 5 wt% Zn
8. The alloy of any preceding claim, further comprising 0.05-0.4 wt % Si.
9. The alloy of claim 8, comprising about 0.1 wt% Si.
10. The alloy of any preceding claim, containing about 75 wt% Ag, about 18 wt% Cu and about 4.5 wt% Zn, about 1.5 wt% Ge and about 1 wt% Sn.
11. Use of the alloy of any preceding claim to solder or braze a joint in silver.
12. Use of the alloy of any of claims 1-10 to solder or braze ajoint in Sterling silver.
13, Use of the alloy of any of claims 1-10 to solder or braze a joint in silver alloy of silver content at least Ag 92.5 wt% and containing germanium in an amount effective to impart firestain and/or tarnish resistance.
14. An alloy according to any of claims 1-10, which is in the form of rod, strip or wire.
15. An alloy according to any of claims 1-0, which is in the form of paste.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0513985A GB2428046A (en) | 2005-07-07 | 2005-07-07 | A silver-copper-zinc-germanium brazing alloy |
| EP06744350A EP1904263A1 (en) | 2005-07-07 | 2006-06-12 | Silver solder or brazing alloys and their use |
| PCT/GB2006/050149 WO2007007120A1 (en) | 2005-07-07 | 2006-06-12 | Silver solder or brazing alloys and their use |
| CNA2006800246467A CN101223003A (en) | 2005-07-07 | 2006-06-12 | Silver solder or brazing alloys and their use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0513985A GB2428046A (en) | 2005-07-07 | 2005-07-07 | A silver-copper-zinc-germanium brazing alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0513985D0 GB0513985D0 (en) | 2005-08-17 |
| GB2428046A true GB2428046A (en) | 2007-01-17 |
Family
ID=34896900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0513985A Withdrawn GB2428046A (en) | 2005-07-07 | 2005-07-07 | A silver-copper-zinc-germanium brazing alloy |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1904263A1 (en) |
| CN (1) | CN101223003A (en) |
| GB (1) | GB2428046A (en) |
| WO (1) | WO2007007120A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012100920A1 (en) * | 2012-02-03 | 2013-08-08 | Horwitz-Hamburg GmbH | Silver alloy, useful for preparing jewelry, comprises silver, and alloying additive comprising copper, zinc and boron |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513726B (en) * | 2011-12-22 | 2014-11-12 | 佛山市益宏焊接有限公司 | Silver-based flux-cored wire and manufacturing method thereof |
| CN114193026A (en) * | 2021-12-30 | 2022-03-18 | 郑州机械研究所有限公司 | High-silver brazing filler metal for welding pure silver jewelry and preparation method thereof |
| CN114473292A (en) * | 2021-12-30 | 2022-05-13 | 郑州机械研究所有限公司 | Low-silver brazing filler metal for welding pure-silver jewelry and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3811876A (en) * | 1969-02-05 | 1974-05-21 | Suwa Seikosha Kk | Silver alloys having high sulphuration resistance |
| JPS6134148A (en) * | 1984-07-25 | 1986-02-18 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
| JPH04339590A (en) * | 1991-05-10 | 1992-11-26 | Citizen Watch Co Ltd | Silver brazing filler metal |
| WO1995014112A1 (en) * | 1993-11-15 | 1995-05-26 | Apecs Investment Castings Pty. Ltd. | Silver alloy compositions |
| NZ506379A (en) * | 1999-08-24 | 2001-12-21 | Degussa | Cadmium-free brazing alloys comprising 45-75 weight % Ag, 10-30 weight % Cu, 1-25% weight Zn, and other elements |
| WO2005051593A1 (en) * | 2003-11-19 | 2005-06-09 | Middlesex Silver Co. Limited | Silver solder or brazing alloys and their use |
| GB2418432A (en) * | 2004-09-23 | 2006-03-29 | Middlesex Silver Co Ltd | Silver alloy and its production using a master metal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1029087A (en) * | 1996-07-12 | 1998-02-03 | Tanaka Kikinzoku Kogyo Kk | Low melting brazing filler metal for platinum ornaments |
| GB0328603D0 (en) * | 2003-12-10 | 2004-01-14 | Cole Paul G | Silver chain manufacture |
-
2005
- 2005-07-07 GB GB0513985A patent/GB2428046A/en not_active Withdrawn
-
2006
- 2006-06-12 CN CNA2006800246467A patent/CN101223003A/en active Pending
- 2006-06-12 WO PCT/GB2006/050149 patent/WO2007007120A1/en not_active Application Discontinuation
- 2006-06-12 EP EP06744350A patent/EP1904263A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3811876A (en) * | 1969-02-05 | 1974-05-21 | Suwa Seikosha Kk | Silver alloys having high sulphuration resistance |
| JPS6134148A (en) * | 1984-07-25 | 1986-02-18 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
| JPH04339590A (en) * | 1991-05-10 | 1992-11-26 | Citizen Watch Co Ltd | Silver brazing filler metal |
| WO1995014112A1 (en) * | 1993-11-15 | 1995-05-26 | Apecs Investment Castings Pty. Ltd. | Silver alloy compositions |
| NZ506379A (en) * | 1999-08-24 | 2001-12-21 | Degussa | Cadmium-free brazing alloys comprising 45-75 weight % Ag, 10-30 weight % Cu, 1-25% weight Zn, and other elements |
| WO2005051593A1 (en) * | 2003-11-19 | 2005-06-09 | Middlesex Silver Co. Limited | Silver solder or brazing alloys and their use |
| GB2418432A (en) * | 2004-09-23 | 2006-03-29 | Middlesex Silver Co Ltd | Silver alloy and its production using a master metal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012100920A1 (en) * | 2012-02-03 | 2013-08-08 | Horwitz-Hamburg GmbH | Silver alloy, useful for preparing jewelry, comprises silver, and alloying additive comprising copper, zinc and boron |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0513985D0 (en) | 2005-08-17 |
| CN101223003A (en) | 2008-07-16 |
| WO2007007120A1 (en) | 2007-01-18 |
| EP1904263A1 (en) | 2008-04-02 |
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