ES2054943T3 - PROCEDURE FOR THE MANUFACTURE OF SINTERED STEEL PARTS AND PARTS SO OBTAINED. - Google Patents

PROCEDURE FOR THE MANUFACTURE OF SINTERED STEEL PARTS AND PARTS SO OBTAINED.

Info

Publication number
ES2054943T3
ES2054943T3 ES89113211T ES89113211T ES2054943T3 ES 2054943 T3 ES2054943 T3 ES 2054943T3 ES 89113211 T ES89113211 T ES 89113211T ES 89113211 T ES89113211 T ES 89113211T ES 2054943 T3 ES2054943 T3 ES 2054943T3
Authority
ES
Spain
Prior art keywords
parts
sintered
sintering
procedure
piece
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 - Lifetime
Application number
ES89113211T
Other languages
Spanish (es)
Inventor
Dieter Dr Rer Nat Pohl
Hans A Dipl-Ing Harle
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive GmbH
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 Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Application granted granted Critical
Publication of ES2054943T3 publication Critical patent/ES2054943T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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%
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • B22F3/26—Impregnating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

EN LA SOLICITUD DE PATENTE SE DESCRIBE UN PROCEDIMIENTO PARA PREPARAR PIEZAS PERFILADAS EN ACERO SINTERIZADO. EL PROCEDIMIENTO CONSISTE EN A) PRENSAR EL POLVO DE ACERO SINTERIZADO HASTA DARLE FORMA; B) SINTERIZAR LA FORMA PRENSADA; C) AUSTENIZAR LA PIEZA SINTERIZADA MEDIANTE CALENTAMIENTO A UNA TEMPERATURA SUPERIOR A 8000 C; D) ENFRIAR RAPIDAMENTE LA PIEZA DE SINTERIZADO A UNA TEMPERATURA ENTRE 280 Y 450 C SEGUN EL TRATAMIENTO AUSTENIZADO DADO A LA PIEZA DE SINTERIZADO Y E) MANTENER LA PIEZA DE SINTERIZADO A UNA TEMPERATURA ENTRE 280 Y 450 C DURANTE CINCO A OCHENTA MINUTOS, PARA OBTENER UNA PIEZA SINTERIZADA CON MICROESTRUCTURA BAINITICA. LA PIEZA PERFILADA DEL ACERO SINTERIZADO TIENE UNA MICROESTRUCTURA EN BAINITA.A PROCEDURE FOR PREPARING PROFILED PIECES IN SINTERED STEEL IS DESCRIBED IN THE PATENT APPLICATION. THE PROCEDURE CONSISTS OF A) PRESSING THE SINTERED STEEL POWDER UNTIL IT IS SHAPED; B) SINTERING THE PRESSED FORM; C) ENHANCING THE SINTERED PART BY HEATING TO A TEMPERATURE OVER 8000 C; D) QUICKLY COOL THE SINTERING PIECE TO A TEMPERATURE BETWEEN 280 AND 450 C ACCORDING TO THE GREEN TREATMENT GIVEN TO THE SINTERING PIECE AND E) MAINTAIN THE SINTERING PART AT A TEMPERATURE BETWEEN 280 AND 450 C FOR FIVE TO EIGHT MINUTE SINTERED PIECE WITH BAINITIC MICROSTRUCTURE. THE PROFILED PIECE OF SINTERED STEEL HAS A MICROSTRUCTURE IN BAINITE.

ES89113211T 1988-07-27 1989-07-19 PROCEDURE FOR THE MANUFACTURE OF SINTERED STEEL PARTS AND PARTS SO OBTAINED. Expired - Lifetime ES2054943T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3825463A DE3825463A1 (en) 1988-07-27 1988-07-27 METHOD FOR PRODUCING A MOLDING PART FROM SINTERMETAL AND MOLDING PART MADE THEREOF

Publications (1)

Publication Number Publication Date
ES2054943T3 true ES2054943T3 (en) 1994-08-16

Family

ID=6359640

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89113211T Expired - Lifetime ES2054943T3 (en) 1988-07-27 1989-07-19 PROCEDURE FOR THE MANUFACTURE OF SINTERED STEEL PARTS AND PARTS SO OBTAINED.

Country Status (4)

Country Link
EP (1) EP0354389B1 (en)
DE (2) DE3825463A1 (en)
ES (1) ES2054943T3 (en)
PT (1) PT91283B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521941C1 (en) * 1995-06-07 1996-10-02 Mannesmann Ag Mfg. sintered air-hardenable alloy steel component
DE19524251C1 (en) * 1995-07-04 1997-02-13 Supervis Ets Process for producing a sintered molded part
JP4001450B2 (en) * 2000-05-02 2007-10-31 日立粉末冶金株式会社 Valve seat for internal combustion engine and manufacturing method thereof
SE0201824D0 (en) * 2002-06-14 2002-06-14 Hoeganaes Ab Pre-alloyed iron based powder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566752A (en) * 1948-10-14 1951-09-04 American Electro Metal Corp Method of producing a ferrous metal article infiltrated with a cuprous infiltrant
US4002471A (en) * 1973-09-24 1977-01-11 Federal-Mogul Corporation Method of making a through-hardened scale-free forged powdered metal article without heat treatment after forging
JPS50115108A (en) * 1974-02-21 1975-09-09
US4343661A (en) * 1978-11-15 1982-08-10 Caterpillar Tractor Co. Method of making a low temperature bainite steel alloy gear
DE3142359A1 (en) * 1981-10-26 1983-05-05 Horst Dipl.-Phys. Dr. 6000 Frankfurt Mühlberger Process and device for heat-treating workpieces

Also Published As

Publication number Publication date
PT91283A (en) 1990-02-08
DE3825463A1 (en) 1990-02-01
EP0354389A1 (en) 1990-02-14
EP0354389B1 (en) 1994-05-04
PT91283B (en) 1995-03-01
DE58907598D1 (en) 1994-06-09

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