ES477462A1 - Un procedimiento mejorado para sintetizar piezas metalicas en polvo. - Google Patents

Un procedimiento mejorado para sintetizar piezas metalicas en polvo.

Info

Publication number
ES477462A1
ES477462A1 ES477462A ES477462A ES477462A1 ES 477462 A1 ES477462 A1 ES 477462A1 ES 477462 A ES477462 A ES 477462A ES 477462 A ES477462 A ES 477462A ES 477462 A1 ES477462 A1 ES 477462A1
Authority
ES
Spain
Prior art keywords
metal parts
powder metal
sintering powder
sintering
parts
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
ES477462A
Other languages
English (en)
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.)
Union Carbide Corp
Original Assignee
Union Carbide 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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of ES477462A1 publication Critical patent/ES477462A1/es
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

Landscapes

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

Abstract

Un procedimiento mejorado para sinterizar piezas metálicas en polvo, que comprende: (a) hacer pasar las piezas por un horno adaptado para este fin desde su extremo aguas arriba hasta su extremo aguas abajo, teniendo dicho horno dos zonas sucesivas, una zona aguas arriba, que se mantiene a una temperatura en el intervalo de aproximadamente 427ºC a aproximadamente 1204ºC y una zona de enfriamiento, teniendo además dicho horno una atmósfera que comprende monóxido de carbono, hidrógeno, dióxido de carbono, agua y nitrógeno distribuido por todas las zonas; (b) permitir que las piezas permanezcan en la zona aguas arriba durante un periodo de tiempo suficiente para originar la sinterización; y (c) separar del horno las piezas sinterizadas, comprendiendo la mejora.
ES477462A 1978-02-06 1979-02-05 Un procedimiento mejorado para sintetizar piezas metalicas en polvo. Expired ES477462A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/875,615 US4139375A (en) 1978-02-06 1978-02-06 Process for sintering powder metal parts

Publications (1)

Publication Number Publication Date
ES477462A1 true ES477462A1 (es) 1979-10-16

Family

ID=25366084

Family Applications (1)

Application Number Title Priority Date Filing Date
ES477462A Expired ES477462A1 (es) 1978-02-06 1979-02-05 Un procedimiento mejorado para sintetizar piezas metalicas en polvo.

Country Status (12)

Country Link
US (1) US4139375A (es)
KR (1) KR820001808B1 (es)
BE (1) BE873945A (es)
BR (1) BR7900679A (es)
CA (1) CA1114656A (es)
CH (1) CH629131A5 (es)
DE (1) DE2904318C2 (es)
ES (1) ES477462A1 (es)
FR (1) FR2416075A1 (es)
IT (1) IT1114082B (es)
MX (1) MX151113A (es)
NL (1) NL7900904A (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359351A (en) * 1979-10-23 1982-11-16 Air Products And Chemicals, Inc. Protective atmosphere process for annealing and or spheroidizing ferrous metals
US4285742A (en) * 1979-11-29 1981-08-25 Boc Limited Heat treatment method
US4436696A (en) * 1981-05-20 1984-03-13 Air Products And Chemicals, Inc. Process for providing a uniform carbon distribution in ferrous compacts at high temperatures
US4655853A (en) * 1982-08-09 1987-04-07 Federal-Mogul Corporation Method for making powder metal forging preforms of high-strength ferrous-base alloys
US4450017A (en) * 1982-10-21 1984-05-22 Air Products And Chemicals, Inc. Gaseous decarburizing mixtures of hydrogen, carbon dioxide and a carrier gas
FR2598641B1 (fr) * 1986-05-16 1988-08-26 Air Liquide Procede de frittage dans un four continu de materiau en poudre
DE3808146A1 (de) * 1988-03-11 1989-09-21 Messer Griesheim Gmbh Verfahren zur herstellung eines schutzgases fuer die waermebehandlung von eisen und nichteisenmetallen
FR2649124A1 (fr) * 1989-07-03 1991-01-04 Air Liquide Procede de traitement thermique de metaux sous atmosphere
DE4104982A1 (de) * 1991-02-19 1992-08-20 Linde Ag Durchlaufwaermebehandlungsanlage mit spezieller schutzgasabsaugung
US5334341A (en) * 1992-05-27 1994-08-02 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for controlling carbon content of injection molding steels during debinding
US5613185A (en) * 1995-06-01 1997-03-18 Air Products And Chemicals, Inc. Atmospheres for extending life of wire mesh belts used in sintering powder metal components
US6533996B2 (en) * 2001-02-02 2003-03-18 The Boc Group, Inc. Method and apparatus for metal processing
US8986605B2 (en) * 2009-12-21 2015-03-24 Air Products And Chemicals, Inc. Method and atmosphere for extending belt life in sintering furnace
US9157682B2 (en) 2011-02-10 2015-10-13 Linde Aktiengesellschaft Furnace atmosphere generator
EP3042967A1 (en) * 2015-01-08 2016-07-13 Linde Aktiengesellschaft Gas mixture and method for controlling a carbon potential of a furnace atmosphere

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333573A (en) * 1942-02-12 1943-11-02 Westinghouse Electric & Mfg Co Process of making steel
US2673821A (en) * 1950-11-18 1954-03-30 Midwest Research Inst Heat treatment of steel in a protective atmosphere
US4028100A (en) * 1973-05-17 1977-06-07 Chrysler Corporation Heat treating atmospheres
US3891473A (en) * 1973-05-17 1975-06-24 Chrysler Corp Heat treating atmospheres

Also Published As

Publication number Publication date
KR820001808B1 (ko) 1982-10-12
NL7900904A (nl) 1979-08-08
US4139375A (en) 1979-02-13
FR2416075A1 (fr) 1979-08-31
DE2904318C2 (de) 1983-10-27
DE2904318A1 (de) 1979-08-09
CA1114656A (en) 1981-12-22
IT1114082B (it) 1986-01-27
BE873945A (fr) 1979-08-06
IT7947890A0 (it) 1979-02-05
BR7900679A (pt) 1979-09-04
FR2416075B1 (es) 1984-04-06
MX151113A (es) 1984-10-03
CH629131A5 (fr) 1982-04-15

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