GB1532641A - Alloy steel powders - Google Patents

Alloy steel powders

Info

Publication number
GB1532641A
GB1532641A GB1762275A GB1762275A GB1532641A GB 1532641 A GB1532641 A GB 1532641A GB 1762275 A GB1762275 A GB 1762275A GB 1762275 A GB1762275 A GB 1762275A GB 1532641 A GB1532641 A GB 1532641A
Authority
GB
United Kingdom
Prior art keywords
powder
sintering
alloy steel
april
annealing
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
GB1762275A
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.)
British Steel Corp
Original Assignee
British Steel 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 British Steel Corp filed Critical British Steel Corp
Priority to GB1762275A priority Critical patent/GB1532641A/en
Publication of GB1532641A publication Critical patent/GB1532641A/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
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

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

1532641 Alloy steel powder BRITISH STEEL CORP 27 April 1976 [28 April 1975] 17622/75 Heading C7A A finely divided alloy steel powder consists of The powder is produced by water atomization of a steel melt, followed by annealing in hydrogen or cracked ammonia enriched by CO or a hydrocarbon gas at 700 - 900‹C and subsequently sintering at 900-1300‹C typically 1150‹C in a similar atmosphere with a dewpoint of -10‹C max to reduce the oxygen content to below 250 p.p.m. Graphite additions may be made after annealing to compensate for Carbon losses during sintering. The powder may be compacted into the required shape i.e. automotive shafts, gears, bearings etc., by isostatic pressing or die compaction, and densified to 99% + of theoretical density by hot pressing, rolling, forging or extruding, and subsequently heat treated at 800-860‹C, quenching and tempering to give Hv of 800 minimum. Alternatively, sintering may be carried out at 1250‹C under reduced pressure conditions, either as a continuous process or in a batch furnace.
GB1762275A 1976-04-27 1976-04-27 Alloy steel powders Expired GB1532641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1762275A GB1532641A (en) 1976-04-27 1976-04-27 Alloy steel powders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1762275A GB1532641A (en) 1976-04-27 1976-04-27 Alloy steel powders

Publications (1)

Publication Number Publication Date
GB1532641A true GB1532641A (en) 1978-11-15

Family

ID=10098358

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1762275A Expired GB1532641A (en) 1976-04-27 1976-04-27 Alloy steel powders

Country Status (1)

Country Link
GB (1) GB1532641A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30855E (en) 1978-10-23 1982-01-26 Pitney Bowes Inc. Powder metal composition
WO1992005897A1 (en) * 1990-10-08 1992-04-16 Formflo Limited Gear wheels rolled from powder metal blanks
EP0653262A1 (en) * 1993-06-02 1995-05-17 Kawasaki Steel Corporation Alloy steel powder for sinter with high strength, high fatigue strength and high toughness, sinter, and process for producing the sinter
US5711187A (en) * 1990-10-08 1998-01-27 Formflo Ltd. Gear wheels rolled from powder metal blanks and method of manufacture
EP0960953A2 (en) * 1994-04-15 1999-12-01 Kawasaki Steel Corporation Alloy steel powders, sintered bodies and method
EP1767286A1 (en) * 2004-07-15 2007-03-28 Nippon Steel Corporation Hot pressing method for high strength member using steel sheet and hot pressed parts
EP1790422A1 (en) * 2004-09-15 2007-05-30 Nippon Steel Corporation High-strength part and process for producing the same
US7416696B2 (en) 2003-10-03 2008-08-26 Keystone Investment Corporation Powder metal materials and parts and methods of making the same
US8307551B2 (en) 2005-06-10 2012-11-13 Gkn Sinter Metals Holding Gmbh Blank geometry of a gear
US8340806B2 (en) 2005-06-10 2012-12-25 Gkn Sinter Metals Holding Gmbh Surface compression of a toothed section
US8402659B2 (en) 2005-06-10 2013-03-26 Gkn Sinter Metals Holding Gmbh Sintered gear element featuring locally selective surface compression

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30855E (en) 1978-10-23 1982-01-26 Pitney Bowes Inc. Powder metal composition
WO1992005897A1 (en) * 1990-10-08 1992-04-16 Formflo Limited Gear wheels rolled from powder metal blanks
US5711187A (en) * 1990-10-08 1998-01-27 Formflo Ltd. Gear wheels rolled from powder metal blanks and method of manufacture
US5884527A (en) * 1990-10-08 1999-03-23 Formflo Limited Gear wheels rolled from powder metal blanks
EP0653262A1 (en) * 1993-06-02 1995-05-17 Kawasaki Steel Corporation Alloy steel powder for sinter with high strength, high fatigue strength and high toughness, sinter, and process for producing the sinter
EP0653262A4 (en) * 1993-06-02 1999-01-13 Kawasaki Steel Co Alloy steel powder for sinter with high strength, high fatigue strength and high toughness, sinter, and process for producing the sinter.
EP0960953A2 (en) * 1994-04-15 1999-12-01 Kawasaki Steel Corporation Alloy steel powders, sintered bodies and method
EP0960953A3 (en) * 1994-04-15 2002-08-21 Kawasaki Steel Corporation Alloy steel powders, sintered bodies and method
US7416696B2 (en) 2003-10-03 2008-08-26 Keystone Investment Corporation Powder metal materials and parts and methods of making the same
EP1767286A1 (en) * 2004-07-15 2007-03-28 Nippon Steel Corporation Hot pressing method for high strength member using steel sheet and hot pressed parts
EP1767286A4 (en) * 2004-07-15 2008-07-30 Nippon Steel Corp Hot pressing method for high strength member using steel sheet and hot pressed parts
US7867344B2 (en) 2004-07-15 2011-01-11 Nippon Steel Corporation Hot pressing method for high strength member using steel sheet and hot pressed parts
EP1790422A1 (en) * 2004-09-15 2007-05-30 Nippon Steel Corporation High-strength part and process for producing the same
EP1790422A4 (en) * 2004-09-15 2009-03-18 Nippon Steel Corp High-strength part and process for producing the same
US7842142B1 (en) 2004-09-15 2010-11-30 Nippon Steel Corporation High strength part and method for producing the same
US8307551B2 (en) 2005-06-10 2012-11-13 Gkn Sinter Metals Holding Gmbh Blank geometry of a gear
US8340806B2 (en) 2005-06-10 2012-12-25 Gkn Sinter Metals Holding Gmbh Surface compression of a toothed section
US8402659B2 (en) 2005-06-10 2013-03-26 Gkn Sinter Metals Holding Gmbh Sintered gear element featuring locally selective surface compression

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Legal Events

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