GB802801A - Improvements in cemented carbide compositions - Google Patents

Improvements in cemented carbide compositions

Info

Publication number
GB802801A
GB802801A GB11913/55A GB1191355A GB802801A GB 802801 A GB802801 A GB 802801A GB 11913/55 A GB11913/55 A GB 11913/55A GB 1191355 A GB1191355 A GB 1191355A GB 802801 A GB802801 A GB 802801A
Authority
GB
United Kingdom
Prior art keywords
per cent
weight
microns
size
cemented carbide
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
GB11913/55A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB802801A publication Critical patent/GB802801A/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
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • 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

A sintered hard metal composition consists of 40 to 95 per cent by volume (approximately 54 to 97.7 per cent by weight) of WC crystals, at least 50 per cent by weight of which have a size more than 20 microns, bonded into an integral mass with 60 to 5 per cent by volume (approximately 46 to 2.3 per cent by weight) of a binder selected from Co, Ni, Fe or a mixture thereof. As a grain growth inhibitor 0.005 to 0.5 per cent by weight of Cr or its carbide, or 0.10 to 2 per cent by weight of W may be added. The size of WC crystals may be up to 250 microns and the mean size (as defined) is preferably 150 microns. Sintering temperatures of 1300 DEG to 1475 DEG C. are suitable depending on the binder metal content. Specification 802,802 is referred to.
GB11913/55A 1954-05-13 1955-04-25 Improvements in cemented carbide compositions Expired GB802801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US802801XA 1954-05-13 1954-05-13

Publications (1)

Publication Number Publication Date
GB802801A true GB802801A (en) 1958-10-15

Family

ID=22156374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11913/55A Expired GB802801A (en) 1954-05-13 1955-04-25 Improvements in cemented carbide compositions

Country Status (1)

Country Link
GB (1) GB802801A (en)

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