GB1431528A - Process for heating and sintering ferrous powder metal compacts - Google Patents

Process for heating and sintering ferrous powder metal compacts

Info

Publication number
GB1431528A
GB1431528A GB4320474A GB4320474A GB1431528A GB 1431528 A GB1431528 A GB 1431528A GB 4320474 A GB4320474 A GB 4320474A GB 4320474 A GB4320474 A GB 4320474A GB 1431528 A GB1431528 A GB 1431528A
Authority
GB
United Kingdom
Prior art keywords
magnetic field
compact
compacts
sintering
khz
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
GB4320474A
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.)
Gleason Works
Original Assignee
Gleason Works
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
Priority claimed from US406774A external-priority patent/US3894892A/en
Application filed by Gleason Works filed Critical Gleason Works
Publication of GB1431528A publication Critical patent/GB1431528A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • 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
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)

Abstract

1431528 Induction sintering ferrous metal compacts GLEASON WORKS 4 Oct 1974 [15 Oct 1973] 43204/74 Addition to 1407557 Heading C7D Powder metal, particularly ferrous compacts are sintered by first pre-treating in a magnetic field with a frequency high enough to induce a current in the compact to a depth not exceeding “ the maximum compact thickness in order to reduce the electrical resistivity of the compact and then raising to sintering temperature by subjecting it to a magnetic field with a lower frequency than the first. The pre-treating is preferably effected in a R.F. magnetic field not less than 50 KHz e.g. 50-450 KHz and the sintering is effected in a magnetic field frequency of 1-10 KHz. Only selected portions of the compact may be pretreated in the R.F. magnetic field e.g. a smaller diameter portion so that when the compact is finally sintered in a lower frequency induction coil of constant diameter uniform heating is effected due to the reduced time of induction heating response of the pre-treated smaller diameter. Bevel and spun gears are produced from isostatically or mechanically pressed compacts of Fe powder to which is added 0À2-0À8% graphite.
GB4320474A 1973-10-15 1974-10-04 Process for heating and sintering ferrous powder metal compacts Expired GB1431528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US406774A US3894892A (en) 1972-09-05 1973-10-15 Process for heating and sintering ferrous powder metal compacts with radio frequency magnetic field

Publications (1)

Publication Number Publication Date
GB1431528A true GB1431528A (en) 1976-04-07

Family

ID=23609406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4320474A Expired GB1431528A (en) 1973-10-15 1974-10-04 Process for heating and sintering ferrous powder metal compacts

Country Status (5)

Country Link
JP (1) JPS5066409A (en)
CA (1) CA1044488A (en)
DE (1) DE2447788A1 (en)
FR (1) FR2247304B2 (en)
GB (1) GB1431528A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522818A (en) * 1975-06-24 1977-01-10 Toyota Motor Corp Quick sintering method of iron_base metal pwder for sintered forgings

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224483B2 (en) * 1973-05-07 1977-07-01

Also Published As

Publication number Publication date
DE2447788A1 (en) 1975-04-17
FR2247304B2 (en) 1978-04-07
FR2247304A2 (en) 1975-05-09
CA1044488A (en) 1978-12-19
JPS5066409A (en) 1975-06-04

Similar Documents

Publication Publication Date Title
GB1266065A (en)
ES8502249A1 (en) High frequency induction melting furnace and method of preparing ceramic materials with such a furnace.
US3894892A (en) Process for heating and sintering ferrous powder metal compacts with radio frequency magnetic field
CA976002A (en) Method of producing wear-resistant ferrous sintered metal
GB1431528A (en) Process for heating and sintering ferrous powder metal compacts
GB1343536A (en) Liquid sintered cobalt-rare earth intermetallic product
GB1448008A (en) Process for making sintered metal foils
DE2966054D1 (en) Phosphorus-iron powder and method of producing soft magnetic material therefrom
CA1232158A (en) Manufacture of powder cores for electromagnetic apparatus
GB1273815A (en) Method of producing iron base sintered alloys containing copper
GB1385992A (en) Method for producing high strength finished forms from ferrous metal powders
JPS6484701A (en) Manufacture of powder for resin bonded magnet
IL83808A0 (en) Method for in situ tailoring the metallic component of ceramic articles and articles made thereby
CA2133642A1 (en) Process for Producing Single Phase Magnetite Powder
GB1172813A (en) Process for the Production of Copper Bodies of High Mechanical Strength and High Electrical Conductivity.
JPS5221203A (en) Carbon-contained iron-base sintered alloy
GB1496742A (en) Method of producing a sintered article
ES460045A1 (en) Method of manufacturing sintered components
GB1126720A (en) A machinable and hardenable sintered steel alloy
YEN SINTERING AND MICROSTRUCTURAL FEATURES OF SOME FINE SI 3 N 4 POWDERS BY DIFFERENT PREPARATORY METHODS.
GB1114272A (en) Improvements in and relating to a method for manufacturing wire
ES8402359A1 (en) Chromium-containing iron or steel powder and a process for its manufacture.
Steinhorst Importance and Production of Single-Phase Nd sub 2 Fe sub 14 B by Co-reduction
FR2270972A1 (en) Heating pre-sintered metal powder compacts prior to forging - using high frequency induction heating in a protective atmos
GB671543A (en) Improvements in and relating to composite sintered metal powder articles

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee