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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 thereof

Info

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
Application number
GB22198/51A
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.)
Mond Nickel Co Ltd
Original Assignee
Mond Nickel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mond Nickel Co Ltd filed Critical Mond Nickel Co Ltd
Publication of GB689553A publication Critical patent/GB689553A/en
Expired legal-status Critical Current

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

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.
GB22198/51A 1950-09-21 1951-09-21 Improvements relating to the production of castings of palladium and alloys thereof Expired GB689553A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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