GB1210856A - Powder metallurgy process - Google Patents

Powder metallurgy process

Info

Publication number
GB1210856A
GB1210856A GB3629368A GB3629368A GB1210856A GB 1210856 A GB1210856 A GB 1210856A GB 3629368 A GB3629368 A GB 3629368A GB 3629368 A GB3629368 A GB 3629368A GB 1210856 A GB1210856 A GB 1210856A
Authority
GB
United Kingdom
Prior art keywords
tool steel
sintered
july
carried out
hydrogen
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
GB3629368A
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.)
Aerojet Rocketdyne Inc
Original Assignee
Aerojet General Corp
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 Aerojet General Corp filed Critical Aerojet General Corp
Publication of GB1210856A publication Critical patent/GB1210856A/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
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0235—Starting from compounds, e.g. oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

1,210,856. Sintered tool steel. AEROJET - GENERAL CORP. July 30, 1968 [July 31, 1967; July 3, 1968], No.36293/68. Heading C7D. A sintered tool steel is made from irregularly shaped fractured pre-alloyed tool steel particles made by impact pulverizing, the particles being hydrogen reduced and cooled at a rate less than 300‹ F . /hour, to give a Rc hardness not more than 55 cold pressed at e.g. 60, 000 - 100, 000 p.s.i. and sintered to a theoretical density of at least 85%. 0À1-1% by weight of carbon may be added to the particles prior to hydrogen reduction at 1750‹ - 1875‹F. and compaction may be affected mechanically, isostatically or by explosion to a green density of 55-86%. Sintering is effected in hydrogen or a carbonaceous atmosphere at 2150‹-2350‹F. or by hot rolling at 2000-2200‹ F. or explosively compacted. Liquid phase sintering may be carried out with the addition of MoS2 or VB2 (about 0À1% by weight) or up to 5% of metal halides or 0À25% of Ni, Cn or Co to the tool steel powder. The sintered body is worked as by swaging, forging or rolling e.g. at 1800-2000‹ F. Heat treatment is carried out by oil quenching from 2200‹ F. and double tempering at 1050‹F. After the oil quench super cooling in liquid Nz at -320‹ F. may be carried out.
GB3629368A 1967-07-31 1968-07-30 Powder metallurgy process Expired GB1210856A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US65708767A 1967-07-31 1967-07-31
US74219468A 1968-07-03 1968-07-03

Publications (1)

Publication Number Publication Date
GB1210856A true GB1210856A (en) 1970-11-04

Family

ID=27097329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3629368A Expired GB1210856A (en) 1967-07-31 1968-07-30 Powder metallurgy process

Country Status (10)

Country Link
JP (1) JPS4916324B1 (en)
BE (1) BE718801A (en)
CH (1) CH488509A (en)
DE (1) DE1758714C3 (en)
ES (1) ES356683A1 (en)
FR (1) FR1576757A (en)
GB (1) GB1210856A (en)
NL (1) NL162004C (en)
NO (1) NO135018C (en)
SE (1) SE357391B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046826A1 (en) * 1980-08-26 1982-03-10 Ecobric Foundry Limited A method of drying and hot briquetting of cast iron particles
GB2165553A (en) * 1984-10-10 1986-04-16 Powdrex Ltd Steel powder compositions and sintered products

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51157422U (en) * 1975-06-09 1976-12-15
SE8105681L (en) * 1980-10-01 1982-04-02 Uddeholms Ab PROCEDURE FOR THE PREPARATION OF FORMALS WITH PREDICTED FORM
US4452756A (en) * 1982-06-21 1984-06-05 Imperial Clevite Inc. Method for producing a machinable, high strength hot formed powdered ferrous base metal alloy
SE446277B (en) * 1985-01-16 1986-08-25 Kloster Speedsteel Ab VANAD-containing TOOLS MANUFACTURED FROM METAL POWDER AND SET ON ITS MANUFACTURING
JPS63183015U (en) * 1987-05-15 1988-11-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046826A1 (en) * 1980-08-26 1982-03-10 Ecobric Foundry Limited A method of drying and hot briquetting of cast iron particles
GB2165553A (en) * 1984-10-10 1986-04-16 Powdrex Ltd Steel powder compositions and sintered products

Also Published As

Publication number Publication date
CH488509A (en) 1970-04-15
NL162004C (en) 1980-04-15
DE1758714A1 (en) 1971-02-11
NO135018C (en) 1977-01-26
FR1576757A (en) 1969-08-01
DE1758714B2 (en) 1979-01-25
DE1758714C3 (en) 1979-09-13
JPS4916324B1 (en) 1974-04-22
NL6810865A (en) 1969-02-04
BE718801A (en) 1968-12-31
SE357391B (en) 1973-06-25
ES356683A1 (en) 1970-06-01
NL162004B (en) 1979-11-15
NO135018B (en) 1976-10-18

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Legal Events

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