GB380941A - Improvements in or relating to methods for the production of hard alloys - Google Patents

Improvements in or relating to methods for the production of hard alloys

Info

Publication number
GB380941A
GB380941A GB26493/31A GB2649331A GB380941A GB 380941 A GB380941 A GB 380941A GB 26493/31 A GB26493/31 A GB 26493/31A GB 2649331 A GB2649331 A GB 2649331A GB 380941 A GB380941 A GB 380941A
Authority
GB
United Kingdom
Prior art keywords
tungsten
sintered
per cent
melted
mixture
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
GB26493/31A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB380941A publication Critical patent/GB380941A/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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

Hard alloys particularly for making toolbits, wire drawing dies, &c., are produced by mixing a powder comprising tungsten carbide, with or without 3-20 per cent of tungsten powder, with at least 20 per cent of a metallic alloy which contains 50-85 per cent of tungsten and one or more of the metals iron, nickel, cobalt, chromium, titanium, vanadium, molybdenum, and which after having been melted and solidified is finely pulverized. The mixture is formed to shape by pressing or otherwise, and sintered. In an example commercial tungsten and the auxiliary metal or metals are melted in a graphite crucible, poured on to a cool slab of carbon or graphite and pulverized. To prevent excessive absorption of carbon during melting, the auxiliary metal may be introduced in the form of oxide. The mixture is added to powdered tungsten carbide which may contain tungsten and sintered in an electric furnace. If a large quantity of metal is sintered the articles are cooled rapidly immediately after reaching the sintering temperature.
GB26493/31A 1931-04-23 1931-09-22 Improvements in or relating to methods for the production of hard alloys Expired GB380941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE380941X 1931-04-23

Publications (1)

Publication Number Publication Date
GB380941A true GB380941A (en) 1932-09-29

Family

ID=20309180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26493/31A Expired GB380941A (en) 1931-04-23 1931-09-22 Improvements in or relating to methods for the production of hard alloys

Country Status (1)

Country Link
GB (1) GB380941A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137302A (en) * 1983-03-25 1984-10-03 Vending Machines Overload mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137302A (en) * 1983-03-25 1984-10-03 Vending Machines Overload mechanism

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