GB706476A - Improvements in or relating to the manufacture of sintered articles - Google Patents

Improvements in or relating to the manufacture of sintered articles

Info

Publication number
GB706476A
GB706476A GB8896/50A GB889650A GB706476A GB 706476 A GB706476 A GB 706476A GB 8896/50 A GB8896/50 A GB 8896/50A GB 889650 A GB889650 A GB 889650A GB 706476 A GB706476 A GB 706476A
Authority
GB
United Kingdom
Prior art keywords
per cent
chromium
flux
hours
cobalt
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
GB8896/50A
Inventor
Robert Lionel Samuel
George Albert Samuel
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.)
Diffusion Alloys Ltd
Original Assignee
Diffusion Alloys 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 Diffusion Alloys Ltd filed Critical Diffusion Alloys Ltd
Priority to GB8896/50A priority Critical patent/GB706476A/en
Priority to US219768A priority patent/US2744011A/en
Publication of GB706476A publication Critical patent/GB706476A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

In a method of making sintered articles a sinterable metal or metallic carbide powder is mixed with a flux comprising a silicone or an organic silicate and the mixture moulded, preferably without the use of substantial pressure and then sintered. A compact mass can be obtained by using a suspension of fine metal powder in a flux dissolved in a liquid carrier and pouring the mix into a mould and allowing the carrier to evaporate. Vibrating the mould at ultrasonic frequencies will facilitate the compacting. Moulds of plaster of Paris may be used to absorb the carrier liquid. As an example, a flux prepared by diluting 5 ccs. ethyl silicate with 20 ccs. methylated spirit slightly acidified with hydrochloric acid was mixed with fine iron powder of less than 240 mesh to form a liquid suspension which was poured into a mould on a vibrating table and allowed to dry in air for 2 hours. The compact was sintered in a gas-fired oven for 2 hours at 1380 DEG C. After compacting the articles may be immersed in a solution of sodium ethylate or lead acetate in alcohol or in a mixture of alkali metal and alkaline earth metal chloride and heated for 3 hours at 850 DEG C. before sintering for 3 hours at 1250 DEG C. In other examples, ethyl silicate is used as the flux for nickel powder. the mix being of a consistency to be extruded as a rod before sintering at 1320 DEG C. and also for powders containing cobalt 80 per cent., chromium 20 per cent. or chromium 70 per cent. iron 30 per cent. and carbon less than 0.15 per cent. or chromium 70 per cent., nickel 30 per cent. or chromium 65 per cent. and cobalt 35 per cent. Ethyl silicate is also used as the flux for a three-layer compact comprising an inner layer of iron 70 per cent., cobalt 30 per cent., and outer layers of chromium 60 per cent., cobalt 40 per cent., the sintering being at 1340 DEG C. for 2 hours: alternatively the former mixture may be used to fill a cavity in a compact of the latter mixture. Other mixtures using ethyl silicate as a flux are alumina 30 per cent., chromium 70 per cent. or kaolin 10 per cent., chromium 65 per cent., carbon 0.1 per cent., balance iron or tungsten carbide 94 per cent., cobalt 6 per cent. Iron articles made according to the invention may in addition be subjected to a chromium diffusion process as described in Specifications 646,637 and 646,638, [both in Group II].
GB8896/50A 1950-04-11 1950-04-11 Improvements in or relating to the manufacture of sintered articles Expired GB706476A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8896/50A GB706476A (en) 1950-04-11 1950-04-11 Improvements in or relating to the manufacture of sintered articles
US219768A US2744011A (en) 1950-04-11 1951-04-06 Process for the manufacture of sintered articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8896/50A GB706476A (en) 1950-04-11 1950-04-11 Improvements in or relating to the manufacture of sintered articles

Publications (1)

Publication Number Publication Date
GB706476A true GB706476A (en) 1954-03-31

Family

ID=9861389

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8896/50A Expired GB706476A (en) 1950-04-11 1950-04-11 Improvements in or relating to the manufacture of sintered articles

Country Status (2)

Country Link
US (1) US2744011A (en)
GB (1) GB706476A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917384A (en) * 1956-01-19 1959-12-15 Gen Electric Method of making foam material from nickel powder
DE1139654B (en) * 1955-12-12 1962-11-15 Siemens Planiawerke Ag Process for the production of bodies from metals with a melting point above 2000µ by powder metallurgy using inorganic binders
JPS5416315A (en) * 1977-07-07 1979-02-06 Kyoritsu Yuki Kogyo Kenkyusho:Kk Preparation of superhard alloy

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835572A (en) * 1954-07-30 1958-05-20 Isbenjian Hrant Method of making porous metal molds
US2982014A (en) * 1955-05-20 1961-05-02 Meyer-Hartwig Eberhard Process of manufacturing ceramic compounds and metallic ceramic compounds
US2979401A (en) * 1957-12-27 1961-04-11 Union Carbide Corp Slip casting
US3091027A (en) * 1958-11-20 1963-05-28 Pechiney Prod Chimiques Sa Method and composition for assembling together refractory bodies
US3077647A (en) * 1959-07-13 1963-02-19 Gen Motors Corp Parting agent for sprayed metal shells and method for making such shells
US3115698A (en) * 1960-02-29 1963-12-31 Gen Electric Casting metal powders
US3071463A (en) * 1960-05-17 1963-01-01 Sylvania Electric Prod Method of producing sintered metal bodies
US3372066A (en) * 1964-05-06 1968-03-05 Eutectic Welding Alloys Coated carbide particles
FR1478777A (en) * 1965-05-14 1967-07-13
US3384482A (en) * 1966-05-20 1968-05-21 Mallory Battery Canada Method of making a sintered zinc battery anode structure
US3351464A (en) * 1966-07-25 1967-11-07 Tavkozlesi Ki Method for the powder metallurical forming of metal powders by hot casting
US3535110A (en) * 1967-06-09 1970-10-20 Nasa Method of producing refractory bodies having controlled porosity
US3502466A (en) * 1969-04-22 1970-03-24 Ceramco Ind Products Corp Manufacture of articles from powdered metals
US3971657A (en) * 1974-02-13 1976-07-27 Alcan Aluminum Corporation Sintering of particulate metal
US4064914A (en) * 1974-05-08 1977-12-27 Union Carbide Corporation Porous metallic layer and formation
US4040998A (en) * 1975-07-17 1977-08-09 Champion Spark Plug Company Aqueous dispersion of ceramic slurry
US5262122A (en) * 1980-01-14 1993-11-16 Witec Cayman Patents, Ltd. Manufacture of parts from particulate material
US4793968A (en) * 1982-12-29 1988-12-27 Sermatech International, Inc. Surface modified powder metal parts and methods for making same

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US602227A (en) * 1898-04-12 Louis parvilljeie
US1104557A (en) * 1913-03-14 1914-07-21 Dick Kerr & Company Ltd Manufacture of metallic filaments for electric incandescent lamps.
US1642347A (en) * 1922-08-17 1927-09-13 Gen Motors Res Corp Bearing
US1642348A (en) * 1923-01-19 1927-09-13 Gen Motors Res Corp Alloy structure
DE583869C (en) * 1929-02-23 1933-09-11 I G Farbenindustrie Akt Ges Process for the production of electrodes for accumulators by pressure and / or heat treatment of metal powders expediently obtained from metal carbonyl
US2224595A (en) * 1938-03-18 1940-12-10 Gen Electric Method for producing cutting tools
US2262023A (en) * 1939-01-10 1941-11-11 Union Carbide & Carbon Res Lab Volatile welding flux
GB530995A (en) * 1939-07-07 1940-12-27 William David Jones Improvements in or relating to the manufacture of metal articles or masses
GB571881A (en) * 1942-07-14 1945-09-13 British Thomson Houston Co Ltd Improvements in and relating to methods of forming intricate shapes from extruded metal powder
GB575734A (en) * 1943-07-26 1946-03-04 Clifford Shaw Improvements in or relating to moulds for casting of metals or metal alloys
US2388299A (en) * 1943-09-27 1945-11-06 Gen Electric Method of fabricating molds
US2415036A (en) * 1944-10-13 1947-01-28 Bendix Aviat Corp Resistance material
GB615941A (en) * 1945-08-13 1949-01-13 Indiana Steel Products Co Improvements in or relating to methods of making permanently magnetizable material, and the improved permanently magnetizable material resulting therefrom
US2452493A (en) * 1946-02-22 1948-10-26 Metal & Thermit Corp Silicone resins for weld coatings
US2593943A (en) * 1949-03-01 1952-04-22 Thompson Prod Inc Methods of molding powders of metal character

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139654B (en) * 1955-12-12 1962-11-15 Siemens Planiawerke Ag Process for the production of bodies from metals with a melting point above 2000µ by powder metallurgy using inorganic binders
US2917384A (en) * 1956-01-19 1959-12-15 Gen Electric Method of making foam material from nickel powder
JPS5416315A (en) * 1977-07-07 1979-02-06 Kyoritsu Yuki Kogyo Kenkyusho:Kk Preparation of superhard alloy

Also Published As

Publication number Publication date
US2744011A (en) 1956-05-01

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