GB732029A - Improvements in and relating to the production of high density metal bodies such as electrical contact bodies - Google Patents

Improvements in and relating to the production of high density metal bodies such as electrical contact bodies

Info

Publication number
GB732029A
GB732029A GB24853/53A GB2485353A GB732029A GB 732029 A GB732029 A GB 732029A GB 24853/53 A GB24853/53 A GB 24853/53A GB 2485353 A GB2485353 A GB 2485353A GB 732029 A GB732029 A GB 732029A
Authority
GB
United Kingdom
Prior art keywords
mins
electrical contact
bodies
mixture
relating
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
GB24853/53A
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.)
Mallory Metallurgical Products Ltd
Original Assignee
Mallory Metallurgical Products 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 Mallory Metallurgical Products Ltd filed Critical Mallory Metallurgical Products Ltd
Publication of GB732029A publication Critical patent/GB732029A/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
    • C22C1/0466—Alloys based on noble metals
    • 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
    • C22C1/0425—Copper-based alloys
    • 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
    • C22C1/045—Alloys based on refractory metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum

Abstract

An electrical contact or like high-density metal body is made by (a) intimately mixing a reducible compound of tungsten or other refractory metal having a melting point not below 1800 DEG C. and a reducible compound of silver or copper in finely comminuted form; (b) subjecting the mixture to a reduction treatment to convert it into a mixture of small particles of the constituent metals having an average particle size of 0.5-2 microns; (c) compacting the resultant mixture; and (d) sintering the compact in a reducing atmosphere. The starting compounds may be oxides, oxalates or carbonates. The reduction may be effected in an atmosphere of hydrogen or cracked ammonia by heating to 600-700 DEG C. for 30 mins. and then at 900-1000 for 30-60 mins., compacting may be effected at 10-50 t.p.s.i., and the sintering at 1100-1350 DEG C. for 10-60 mins. The metal body contains 30-80 per cent of refractory metal.
GB24853/53A 1952-10-28 1953-09-08 Improvements in and relating to the production of high density metal bodies such as electrical contact bodies Expired GB732029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US732029XA 1952-10-28 1952-10-28

Publications (1)

Publication Number Publication Date
GB732029A true GB732029A (en) 1955-06-15

Family

ID=22112355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24853/53A Expired GB732029A (en) 1952-10-28 1953-09-08 Improvements in and relating to the production of high density metal bodies such as electrical contact bodies

Country Status (1)

Country Link
GB (1) GB732029A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948805A1 (en) * 1978-12-06 1980-06-12 Mitsubishi Electric Corp CONTACT MATERIAL FOR VACUUM CIRCUIT BREAKER OR THE LIKE.
EP0170867A1 (en) * 1984-07-21 1986-02-12 Vacuumschmelze GmbH Process for manufacturing a composite material
EP0324507A1 (en) * 1988-01-14 1989-07-19 GTE Products Corporation Process for producing tungsten heavy alloy sheet by a loose fill hydrometallurgical process
EP0326861A1 (en) * 1988-01-30 1989-08-09 H.C. Starck GmbH & Co. KG Composite agglomerated metal powder, process for manufacturing it an its use
EP0342296A1 (en) * 1988-05-18 1989-11-23 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Forming and sintering a powder mixture containing Al or Cu

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948805A1 (en) * 1978-12-06 1980-06-12 Mitsubishi Electric Corp CONTACT MATERIAL FOR VACUUM CIRCUIT BREAKER OR THE LIKE.
EP0170867A1 (en) * 1984-07-21 1986-02-12 Vacuumschmelze GmbH Process for manufacturing a composite material
EP0324507A1 (en) * 1988-01-14 1989-07-19 GTE Products Corporation Process for producing tungsten heavy alloy sheet by a loose fill hydrometallurgical process
EP0326861A1 (en) * 1988-01-30 1989-08-09 H.C. Starck GmbH & Co. KG Composite agglomerated metal powder, process for manufacturing it an its use
US4915733A (en) * 1988-01-30 1990-04-10 Hermann C. Starck Berlin Gmbh & Co. Kg Agglomerated metal composite powders
EP0342296A1 (en) * 1988-05-18 1989-11-23 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Forming and sintering a powder mixture containing Al or Cu
US4943319A (en) * 1988-05-18 1990-07-24 Kabushiki Kaisha Kobe Seiko Sho Process for producing highly functional composite material and composite material obtained thereby

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