ES380992A1 - Dense bodies of tungsten carbide - Google Patents

Dense bodies of tungsten carbide

Info

Publication number
ES380992A1
ES380992A1 ES380992A ES380992A ES380992A1 ES 380992 A1 ES380992 A1 ES 380992A1 ES 380992 A ES380992 A ES 380992A ES 380992 A ES380992 A ES 380992A ES 380992 A1 ES380992 A1 ES 380992A1
Authority
ES
Spain
Prior art keywords
tungsten
cobalt
weight
carbon
tungsten 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
ES380992A
Other languages
Spanish (es)
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of ES380992A1 publication Critical patent/ES380992A1/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
    • 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
    • C22C29/067—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 comprising a particular metallic binder

Landscapes

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

Abstract

A process for the preparation of a tungsten carbide body bonded with 3 to 25% by weight of a heterogeneous cobalt-tungsten alloy, said alloy consisting essentially of cobalt and an average of 5 to 25% by weight of tungsten and comprising said Alloy regions containing less than 8% by weight of tungsten interdispersed with regions containing more than 8% by weight of tungsten, the process comprising the steps of: (a) Grinding finely divided carbon with cobalt and tungsten carbide in sufficient quantities to produce a mixture containing 0.01 to 0.5% free carbon and with a carbon: tungsten ratio of [1.0-0, 0062 (Pl)] and 1.02, where P is the weight percentage of cobalt in the mixture, said tungsten carbide having a carbon: tungsten ratio of at least 0.80; (b) heating the ground mixture in an inert atmosphere to a temperature Ts between 1OOOºC and TnºC for a period of time between ts and 20 ts minutes, where ** (See formula) ** where P = weight percentage of cobalt; (c) pressing the hot composition to a density greater than 99% of the theoretical one in a zone heated to a temperature of Tm, for a time between tm and 20 tm minutes, where: ** (See formula) ** (d) cooling the pressed composition at high speed. (Machine-translation by Google Translate, not legally binding)
ES380992A 1969-06-23 1970-06-20 Dense bodies of tungsten carbide Expired ES380992A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US83581469A 1969-06-23 1969-06-23
US83581769A 1969-06-23 1969-06-23
US83581569A 1969-06-23 1969-06-23

Publications (1)

Publication Number Publication Date
ES380992A1 true ES380992A1 (en) 1973-04-01

Family

ID=27420254

Family Applications (1)

Application Number Title Priority Date Filing Date
ES380992A Expired ES380992A1 (en) 1969-06-23 1970-06-20 Dense bodies of tungsten carbide

Country Status (11)

Country Link
JP (1) JPS4931403B1 (en)
AT (1) AT299562B (en)
BE (1) BE751884A (en)
CH (1) CH545347A (en)
DE (1) DE2030666A1 (en)
ES (1) ES380992A1 (en)
FR (1) FR2047071B1 (en)
GB (1) GB1315368A (en)
LU (1) LU61174A1 (en)
NL (1) NL7009125A (en)
SE (2) SE7411631L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112496319A (en) * 2019-09-16 2021-03-16 宿迁启祥电子科技有限公司 Sintering device and preparation method of tungsten alloy material
CN114315358B (en) * 2021-12-27 2023-01-24 海南大学 Fully-compact binderless tungsten carbide ceramic and preparation method thereof
CN116790953B (en) * 2023-07-05 2024-01-05 中国机械总院集团北京机电研究所有限公司 High-performance nano hard alloy product and preparation method thereof

Also Published As

Publication number Publication date
DE2030666A1 (en) 1971-01-07
SE7411631L (en) 1974-09-16
FR2047071A1 (en) 1971-03-12
GB1315368A (en) 1973-05-02
AT299562B (en) 1972-06-26
FR2047071B1 (en) 1973-01-12
BE751884A (en) 1970-12-14
LU61174A1 (en) 1970-08-24
SE7411630L (en) 1974-09-16
JPS4931403B1 (en) 1974-08-21
CH545347A (en) 1973-12-15
NL7009125A (en) 1970-12-28

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