GB799973A - Method of producing shaped bodies from aluminium powder - Google Patents

Method of producing shaped bodies from aluminium powder

Info

Publication number
GB799973A
GB799973A GB25441/56A GB2544156A GB799973A GB 799973 A GB799973 A GB 799973A GB 25441/56 A GB25441/56 A GB 25441/56A GB 2544156 A GB2544156 A GB 2544156A GB 799973 A GB799973 A GB 799973A
Authority
GB
United Kingdom
Prior art keywords
per cent
parts
bearings
powder
nodular
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
GB25441/56A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB799973A publication Critical patent/GB799973A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/04Making non-ferrous alloys by powder metallurgy
    • C22C1/0408Light metal alloys
    • C22C1/0416Aluminium-based alloys

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 process for producing shaped bodies such as thin-walled and profiled parts (e.g. ribbons, bearings) from Al powder comprises plastically deforming (e.g. extruding) a mixture of both flaky and nodular Al powders, together with any desired alloying components such as powdered Si, graphite, and intermetallic compounds of Al. The flakes are preferably lenticular with ragged edges, may be be slightly oxidized, and their grease content should be less than 0.4 per cent. Powders both flaky and nodular may be comparatively coarse, e.g. 60 per cent under 40m is useful for bearings. In an example, 39 parts by weight of nodular Al powder with grain size 80 per cent under 40m and with an oxide content of 6 per cent were mixed with 39 parts of lenticular Al powder of which 55 per cent passed a screen of 40m mesh and having an oxide content of 8 per cent. To this mix were added 20 parts of Si powder (60m ) and 2 parts powdered graphite (40m ), and the whole was cold compressed at 2 tons per sq. cm. into shapes of 72 mm. diameter. The shapes were heated for an hour at 440 DEG C., extruded into a channel section suitable for bearings, cut, and forged in forming dies into the finished halves of bearings.ALSO:A process of producing shaped bodies such as thin-walled and profiled parts (e.g., ribbons, bearings) from Al powder comprises plastically deforming (e.g. extruding) a mixture of both flaky and nodular Al powders, together with any desired alloying components such as powdered Si, graphite, and intermetallic compounds of Al. The flakes are preferably lenticular with ragged edges, may be slightly oxidized, and their grease content should be less than 0,4 per cent. Powders both flaky and nodular may be comparatively coarse, e.g., 60 per cent under 40m is useful for bearings. In an example, 39 parts by weight of nodular Al powder with grain size 80 per cent under 40m and with an oxide content of 6 per cent were mixed with 39 parts of lenticular Al powder of which 55 per cent passed a screen of 40m mesh and having an oxide content of 8 per cent. To this mix were added 20 parts of Si powder (60m ) and 2 parts powdered graphite (40m ), and the whole was cold compressed at 2 tons per sq. cm. into shapes of 72 mm. diameter. The shapes were heated for an hour at 440 DEG C., extruded into a channel section suitable for bearings, cut, and forged in forming dies into the finished halves of bearings.
GB25441/56A 1955-08-31 1956-08-20 Method of producing shaped bodies from aluminium powder Expired GB799973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE799973X 1955-08-31

Publications (1)

Publication Number Publication Date
GB799973A true GB799973A (en) 1958-08-13

Family

ID=6711725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25441/56A Expired GB799973A (en) 1955-08-31 1956-08-20 Method of producing shaped bodies from aluminium powder

Country Status (1)

Country Link
GB (1) GB799973A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166417A (en) * 1962-05-07 1965-01-19 Int Nickel Co Platinum-group metal sheet
US3179516A (en) * 1962-04-27 1965-04-20 Dow Chemical Co Direct powder rolling
US3250838A (en) * 1964-08-04 1966-05-10 Alloys Res & Mfg Corp Techniques for compacting aluminum powder mixtures
US3791800A (en) * 1971-02-03 1974-02-12 Amsted Ind Inc Powder metallurgy aluminum parts

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179516A (en) * 1962-04-27 1965-04-20 Dow Chemical Co Direct powder rolling
US3166417A (en) * 1962-05-07 1965-01-19 Int Nickel Co Platinum-group metal sheet
US3250838A (en) * 1964-08-04 1966-05-10 Alloys Res & Mfg Corp Techniques for compacting aluminum powder mixtures
US3791800A (en) * 1971-02-03 1974-02-12 Amsted Ind Inc Powder metallurgy aluminum parts

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