GB689553A - Improvements relating to the production of castings of palladium and alloys thereof - Google Patents
Improvements relating to the production of castings of palladium and alloys thereofInfo
- Publication number
- GB689553A GB689553A GB22198/51A GB2219851A GB689553A GB 689553 A GB689553 A GB 689553A GB 22198/51 A GB22198/51 A GB 22198/51A GB 2219851 A GB2219851 A GB 2219851A GB 689553 A GB689553 A GB 689553A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- alloy
- melting
- deoxidising
- casting
- 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
Links
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
Abstract
A method of casting Pd or an alloy containing at least 85 per cent Pd comprises heating the Pd or alloy, which is substantially free from P and Si, to a temperature not more than 400 DEG F above its melting point whilst protecting it by a non-oxidizing atmosphere, deoxidizing with W and/or Mo and casting it into a refractory mould. The Pd-alloy may contain any of the precious metals except Os e.g. 95.5 per cent Pd, 4.5 per cent Ru. The melting may take place in an inert atmosphere, e.g. of Ar or He, with injections of a reducing gas e.g. H2 or coal gas, to prevent oxidation of the W and Mo. If W alone is used for deoxidising, it should be at least 0.25 per cent by weight of the Pd or alloy, and if Mo alone is used 0.12 per cent. If both are used, the percentage of Mo plus half the percentage of W is at least 0.12 per cent of the weight of the Pd or alloy. The Pd or alloy may be pre-treated for the removal of Si by melting under oxidizing conditions, and deoxidising treatment carried out in a crucible having a lining containing not more than 0.5 per cent Si which has been treated for the surface removal of Si. A suitable crucible comprises a shell of fine clay and sand lined with cement of fused alumina, 5 per cent of a clay binder and 0.5 per cent silica. This was dried and heated to about 2500 DEG F for 2 hours.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US689553XA | 1950-09-21 | 1950-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB689553A true GB689553A (en) | 1953-04-01 |
Family
ID=22085786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22198/51A Expired GB689553A (en) | 1950-09-21 | 1951-09-21 | Improvements relating to the production of castings of palladium and alloys thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB689553A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984001788A1 (en) * | 1982-10-29 | 1984-05-10 | Wahlbeck H G E | Method and apparatus for the manufacture of non-allergy creating precious metal objects |
| EP0267318A2 (en) * | 1986-11-13 | 1988-05-18 | C. HAFNER GmbH & Co. | Alloy for ornamental purposes |
-
1951
- 1951-09-21 GB GB22198/51A patent/GB689553A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984001788A1 (en) * | 1982-10-29 | 1984-05-10 | Wahlbeck H G E | Method and apparatus for the manufacture of non-allergy creating precious metal objects |
| AU567701B2 (en) * | 1982-10-29 | 1987-12-03 | Wahlbeck, H.G.E. | Method and apparatus for the manufacture of non-allergy creating precious metal objects. |
| AU612136B2 (en) * | 1982-10-29 | 1991-07-04 | Hans Gustav Erik Wahlbeck | Method and apparatus for the manufacture of non-allergy creating precious metal objects |
| EP0267318A2 (en) * | 1986-11-13 | 1988-05-18 | C. HAFNER GmbH & Co. | Alloy for ornamental purposes |
| EP0267318A3 (en) * | 1986-11-13 | 1989-01-11 | C. HAFNER GmbH & Co. | Alloy for ornamental purposes |
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