EP0024217A1 - Verfahren zur Herstellung eines Presskörpers aus Metallpulver - Google Patents

Verfahren zur Herstellung eines Presskörpers aus Metallpulver Download PDF

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Publication number
EP0024217A1
EP0024217A1 EP80302885A EP80302885A EP0024217A1 EP 0024217 A1 EP0024217 A1 EP 0024217A1 EP 80302885 A EP80302885 A EP 80302885A EP 80302885 A EP80302885 A EP 80302885A EP 0024217 A1 EP0024217 A1 EP 0024217A1
Authority
EP
European Patent Office
Prior art keywords
process according
composition
powder metal
range
sintered
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.)
Granted
Application number
EP80302885A
Other languages
English (en)
French (fr)
Other versions
EP0024217B1 (de
Inventor
Yew-Tsung Chen
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.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes Inc
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22081348&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0024217(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pitney Bowes Inc filed Critical Pitney Bowes Inc
Publication of EP0024217A1 publication Critical patent/EP0024217A1/de
Application granted granted Critical
Publication of EP0024217B1 publication Critical patent/EP0024217B1/de
Expired legal-status Critical Current

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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%

Definitions

  • This invention relates to a process for producing compacted powder metal parts from an Fe-Ni-Mn-Mo powder composition.
  • a process for producing a powder metal part involving the steps of compacting a powder metal composition substantially comprising 1.0 - 2.5% Ni, 0.3 - 0.7% Mo, 0.15 - 0.30% Mn, 0.3 - 0.7% C, and 0.5 - 1.0% zinc stearate, the balance being Fe; and is characterised in that the composition additionally comprises substantially 0.5 to 1.5% Cu and in that the compressed part is sintered at a temperature ranging from about 2000°F to about 2150°F for about 15 to about 30 minutes in a furnace having a dew point ranging from about 20°F to about 61°F and under an endothermic atmosphere.
  • the powder be compacted under sufficient pressure to form a part having a density ranging from about 6.4 g/cc to about 7.1 g/cc. Furthermore, a sintering temperature of about 2050°F with a dew point of about 30 - 35°F has been found to be very well suited for this process. Although many of the known endothermic type atmospheres can be used, it has been found that an atmosphere comprising nitrogen, hydrogen and carbon monoxide is preferred.
  • the copper content is preferably substantially 0.75 - 1.0%.
  • the carbon content is preferably 0.45 - 0.55%.
  • the part may be cooled after sintering substantially at a cooling rate of 1.5 to 10OF per second.
  • the compaction step may be carried out substantially at a pressure in the range of 28 to 50 t.s.i.
  • a 1.25" x 0.5" x .25" transverse rupture bar was compacted at 50 tsi (tons per square inch) and sintered at 2050°F for 15 - 30 minutes, with a dew point of 35 0 - 55°F and under endothermic atmosphere. There was only 0.0006" shrinkage in length. After carbonitriding at 1550°F for 30 minutes, the bar was oil quenched and tempered at 350°F for one hour. There was only 0.0008" expansion.
  • the samples of the disclosed composition resulting from Example I were found to have a transverse rupture strength of approximately 160,000 psi after sintering and a transverse rapture strength of approximately 200,000 psi after heat treating. This compares with a transverse rupture strength of approximately 141,000 psi for the known composition in the sintered condition and approximately 196,000 psi in the heated treated condition.
  • the disclosed composition was found to have a fracture toughness as sintered of approximately 21,000 psi-in 1/2 and 23, 0 00 psi-in 1/2 in the heat treated condition. This compares with the known composition having a sintered fractured toughness of approximately 21,000 psi-in 1/2 both in the sintered and heat treated condition.
  • the tensile strengths of samples made from the disclosed composition were measured and found to be 81,000 psi sintered and 125,000 psi heat treated whereas samples made from the known composition were found to be 75,000 psi and 110,000 psi respectively.
  • composition was prepared having the following ingredients:
  • composition was sintered in a moving belt sintering furnace under the following conditions:
  • the properties of the sintered composition were as follows:
  • composition was prepared having the following ingredients :
  • the composition was sintered in a moving belt sintering rnace under the following conditions.
  • the properties of the sintered composition were as follows :

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
EP80302885A 1979-08-20 1980-08-20 Verfahren zur Herstellung eines Presskörpers aus Metallpulver Expired EP0024217B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6824879A 1979-08-20 1979-08-20
US68248 1979-08-20

Publications (2)

Publication Number Publication Date
EP0024217A1 true EP0024217A1 (de) 1981-02-25
EP0024217B1 EP0024217B1 (de) 1984-07-11

Family

ID=22081348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302885A Expired EP0024217B1 (de) 1979-08-20 1980-08-20 Verfahren zur Herstellung eines Presskörpers aus Metallpulver

Country Status (6)

Country Link
EP (1) EP0024217B1 (de)
JP (1) JPS5669351A (de)
AU (1) AU6137380A (de)
BR (1) BR8005201A (de)
CA (1) CA1166043A (de)
DE (1) DE3068524D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101292A1 (de) * 1990-01-17 1991-07-18 Quebec Metal Powders Ltd Entmischungsfreie metallurgische pulvermischungen durch verwendung eines polyvinylpyrrolidon-bindemittels
WO1992022395A1 (en) * 1991-06-12 1992-12-23 Höganäs Ab Iron-based powder composition having good dimensional stability after sintering
WO2008153499A1 (en) * 2007-06-14 2008-12-18 Höganäs Ab (Publ) Iron-based powder and composition thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY153686A (en) * 2009-08-17 2015-03-13 Univ Sains Malaysia A process for producing a metal-matrix composite of significant ?cte between the hard base-metal and the soft matrix
CN107419186A (zh) * 2017-04-28 2017-12-01 张家港振江粉末冶金制品有限公司 一种螺旋齿轮的制造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1492601A (fr) * 1966-09-13 1967-08-18 Hoganas Billesholms Ab Procédé de fabrication de poudre faiblement alliée et poudre ainsi obtenue
FR2331406A1 (fr) * 1975-11-12 1977-06-10 Bsa Sintered Components Ltd Melange de poudres metalliques
DE2752484A1 (de) * 1976-12-30 1978-07-06 Textron Inc Flanschlagerkartusche bzw. lagerflansch
FR2392134A1 (fr) * 1976-11-05 1978-12-22 British Steel Corp Poudres d'acier allie
FR2397904A1 (fr) * 1977-07-20 1979-02-16 Brico Eng Procede pour la fabrication d'articles en metal fritte et articles ainsi obtenus
US4170474A (en) * 1978-10-23 1979-10-09 Pitney-Bowes Powder metal composition

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7828214U1 (de) * 1978-09-22 1979-01-04 Britax (Wingard) Ltd., Chichester, Sussex (Grossbritannien) Verschluss zum verbinden von sicherheitsgurten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1492601A (fr) * 1966-09-13 1967-08-18 Hoganas Billesholms Ab Procédé de fabrication de poudre faiblement alliée et poudre ainsi obtenue
FR2331406A1 (fr) * 1975-11-12 1977-06-10 Bsa Sintered Components Ltd Melange de poudres metalliques
FR2392134A1 (fr) * 1976-11-05 1978-12-22 British Steel Corp Poudres d'acier allie
DE2752484A1 (de) * 1976-12-30 1978-07-06 Textron Inc Flanschlagerkartusche bzw. lagerflansch
FR2397904A1 (fr) * 1977-07-20 1979-02-16 Brico Eng Procede pour la fabrication d'articles en metal fritte et articles ainsi obtenus
US4170474A (en) * 1978-10-23 1979-10-09 Pitney-Bowes Powder metal composition
EP0010442A1 (de) * 1978-10-23 1980-04-30 Pitney Bowes, Inc. Metallpulverzusammensetzung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101292A1 (de) * 1990-01-17 1991-07-18 Quebec Metal Powders Ltd Entmischungsfreie metallurgische pulvermischungen durch verwendung eines polyvinylpyrrolidon-bindemittels
WO1992022395A1 (en) * 1991-06-12 1992-12-23 Höganäs Ab Iron-based powder composition having good dimensional stability after sintering
US5567890A (en) * 1991-06-12 1996-10-22 Hoganas Ab Iron-based powder composition having good dimensional stability after sintering
WO2008153499A1 (en) * 2007-06-14 2008-12-18 Höganäs Ab (Publ) Iron-based powder and composition thereof

Also Published As

Publication number Publication date
EP0024217B1 (de) 1984-07-11
AU6137380A (en) 1981-02-26
BR8005201A (pt) 1981-03-04
CA1166043A (en) 1984-04-24
JPS5669351A (en) 1981-06-10
DE3068524D1 (en) 1984-08-16

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