EP0435019B1 - Article, en particulier came, en alliage de poudre frittée, et son procédé de préparation - Google Patents

Article, en particulier came, en alliage de poudre frittée, et son procédé de préparation Download PDF

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Publication number
EP0435019B1
EP0435019B1 EP90123087A EP90123087A EP0435019B1 EP 0435019 B1 EP0435019 B1 EP 0435019B1 EP 90123087 A EP90123087 A EP 90123087A EP 90123087 A EP90123087 A EP 90123087A EP 0435019 B1 EP0435019 B1 EP 0435019B1
Authority
EP
European Patent Office
Prior art keywords
copper
weight
molybdenum
iron
alloy
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
EP90123087A
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German (de)
English (en)
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EP0435019A1 (fr
Inventor
Karl Leithner
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Supervis
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Supervis
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Publication date
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Publication of EP0435019A1 publication Critical patent/EP0435019A1/fr
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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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • 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

Definitions

  • the use of the alloy for piston and sealing rings also shows that the alloy has to endure relatively low surface pressures. Therefore, the low hardness, which allows easy entry of a counter body, is permissible. Components subject to higher loads, such as cams with a surface pressure of up to 1900 MPa, would have considerable abrasive wear with such low hardness, since the Wear increases sharply with the surface pressure. The alloy would be unsuitable for this application.
  • Cams for the valve train of internal combustion engines are subject to complex sliding loads, which are characterized by the lubrication conditions that depend on the cam shape and the maximum surface pressures.
  • the type of counter body cup or roller tappet
  • the load is usually above 1000 MPa.
  • the Cam failure usually occurs in the form of excessive wear, which can be polishing wear or seizure. Pitting leads to an increase in the effective contact tension between the cam and the counter body and thus accelerates the occurrence of the other two signs of wear. Small-scale pitting does not necessarily mean component failure.
  • the cam material should have a high resistance to pitting, which is the basis of fatigue crack growth - as is the case with delamination.
  • a central idea of this invention is to obtain a structure with the properties described in the simplest possible way, that is to say without complex post-treatment such as impregnation or an annealing treatment.
  • Copper was selected from the known solid lubricants because it neither disintegrates during sintering, nor has an excessively high vapor pressure at the usual sintering temperatures, and, in contrast to cadmium and lead, also appears to be ecologically harmless. Since up to 7.5% of copper dissolves in iron at the sintering temperature in the usual alloy systems, a very high proportion of copper would have been necessary in order to provide sufficient copper as a solid lubricant.
  • FIG. 1 is a 200: 1 magnification
  • Fig. 2 is an enlargement of the same micrograph on a scale of 500: 1.
  • microhardness was less than 50 HV0.01. Since the phase was very finely divided, the diagonals of the impressions were almost as large as the areas themselves, so that an exact specification of the microhardness is not possible.
  • the hardness of pure copper is 34 HV (38).
  • cams are also relevant for other molded parts that are subject to wear, for example rocker arms, rocker arms etc., i.e. molded parts that are subject to sliding wear.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Gears, Cams (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (4)

  1. Came en alliage fritté préparé par métallurgie des poudres pour un arbre à came assemblé par éléments standardisé de moteurs à combustion interne, dans laquelle l'alliage présente une matrice durcie avec incorporation de cuivre et qui est constitué de 0,5-16 % en poids de molybdène, 1-20 % en poids de cuivre, 0,1-1,5 % en poids de carbone et le cas échéant de petites quantités de chrome, de manganèse, de silicium et de nickel dont la somme représente au maximum 5 % en poids et dont le reste est du fer et la poudre fer-molybdène est pré-alliée.
  2. Procédé de fabrication d'une came selon la revendication 1, dans lequel on comprime une poudre préalliée fer-molybdène à fritter constituée de 0,5-16 % en poids de molybdène, 1-20 % en poids de cuivre, 0,1-1,5 % en poids de carbone et comprenant le cas échéant de petites quantités de chrome, de manganèse, de silicium et de nickel dont la somme représente au maximum 5 % en poids et le reste est du fer en une ébauche de came ayant une densité brute supérieure à 7 g/cm³ et/ou fritté à des températures inférieures à 1150°C pendant un temps de frittage de 10 à 60 minutes et ensuite on trempe.
  3. Procédé selon la revendication 2, caractérisé en ce qu'on incorpore le cuivre par mélange dans la poudre fer molybdène préalliée.
  4. Procédé selon l'une des revendications 2 ou 3, caractérisé en ce qu'on incorpore le carbone par mélange de graphite à la poudre frittée ou en totalité ou partiellement par une atmosphère à cémentation pendant le frittage et/ou pendant la trempe.
EP90123087A 1989-12-20 1990-12-03 Article, en particulier came, en alliage de poudre frittée, et son procédé de préparation Expired - Lifetime EP0435019B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3942091 1989-12-20
DE3942091A DE3942091C1 (fr) 1989-12-20 1989-12-20

Publications (2)

Publication Number Publication Date
EP0435019A1 EP0435019A1 (fr) 1991-07-03
EP0435019B1 true EP0435019B1 (fr) 1995-05-17

Family

ID=6395899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123087A Expired - Lifetime EP0435019B1 (fr) 1989-12-20 1990-12-03 Article, en particulier came, en alliage de poudre frittée, et son procédé de préparation

Country Status (7)

Country Link
US (1) US5082433A (fr)
EP (1) EP0435019B1 (fr)
JP (1) JPH03291361A (fr)
KR (1) KR0183390B1 (fr)
CA (1) CA2032300C (fr)
DE (2) DE3942091C1 (fr)
ES (1) ES2075122T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011109473A1 (de) 2011-08-04 2012-03-15 Daimler Ag Sinterbauteil und Nockenwelle

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9021767D0 (en) * 1990-10-06 1990-11-21 Brico Eng Sintered materials
JP2713658B2 (ja) * 1990-10-18 1998-02-16 日立粉末冶金株式会社 焼結耐摩摺動部材
JP3520093B2 (ja) * 1991-02-27 2004-04-19 本田技研工業株式会社 二次硬化型高温耐摩耗性焼結合金
US5256184A (en) * 1991-04-15 1993-10-26 Trw Inc. Machinable and wear resistant valve seat insert alloy
ATE195276T1 (de) * 1992-12-21 2000-08-15 Stackpole Ltd Verfahren zur herstellung von lagern
US5293847A (en) * 1993-02-16 1994-03-15 Hoffman Ronald J Powdered metal camshaft assembly
US5834640A (en) * 1994-01-14 1998-11-10 Stackpole Limited Powder metal alloy process
WO1995021275A1 (fr) * 1994-02-08 1995-08-10 Stackpole Limited Alliage fritte haute densite
AT405916B (de) * 1995-02-16 1999-12-27 Miba Sintermetall Ag Verfahren zum herstellen eines nockens für eine gefügte nockenwelle
US6210503B1 (en) 1997-11-13 2001-04-03 Cummins Engine Company, Inc. Roller pin materials for enhanced cam durability
JPH11280419A (ja) 1998-03-31 1999-10-12 Sumitomo Electric Ind Ltd シムとカムの組合せ体
DE19858483A1 (de) * 1998-12-18 2000-08-31 Mannesmann Rexroth Ag Hydraulische Verdrängermaschine, insbesondere Verdrängerpumpe
JP2000192110A (ja) * 1998-12-22 2000-07-11 Honda Motor Co Ltd カムシャフトの製造方法
JP2001090808A (ja) * 1999-09-21 2001-04-03 Toyota Motor Corp ３次元カム及びその製造方法
JP3835103B2 (ja) * 2000-01-28 2006-10-18 スズキ株式会社 焼結合金及びその硬化処理方法
SE0203135D0 (sv) * 2002-10-23 2002-10-23 Hoeganaes Ab Dimensional control
JP4115826B2 (ja) * 2002-12-25 2008-07-09 富士重工業株式会社 アルミニウム合金鋳包み性に優れた鉄系焼結体およびその製造方法
JP4799006B2 (ja) * 2004-03-01 2011-10-19 株式会社小松製作所 Ｆｅ系シール摺動部材およびその製造方法
JP4799004B2 (ja) * 2004-03-08 2011-10-19 株式会社小松製作所 Ｆｅ系シール摺動部材及びその製造方法
JP4820562B2 (ja) * 2004-04-05 2011-11-24 株式会社小松製作所 Ｆｅ系耐摩耗摺動材料および摺動部材
DE102004028221A1 (de) * 2004-06-09 2005-12-29 Ina-Schaeffler Kg Hochbeanspruchtes Motorenbauteil
TWI325896B (en) * 2005-02-04 2010-06-11 Hoganas Ab Publ Iron-based powder combination
KR100966266B1 (ko) * 2009-11-16 2010-06-28 (주)씬터온 소결경화된 분말금속부품의 제조방법
JP5936954B2 (ja) * 2012-08-23 2016-06-22 Ntn株式会社 機械部品の製造方法
KR101953493B1 (ko) * 2014-09-30 2019-02-28 제이엑스금속주식회사 스퍼터링 타깃용 모합금 및 스퍼터링 타깃의 제조 방법
CN105149595A (zh) * 2015-08-28 2015-12-16 苏州莱特复合材料有限公司 一种粉末冶金轴套及其制备方法
JP7354996B2 (ja) * 2020-11-30 2023-10-03 Ｊｆｅスチール株式会社 鉄基合金焼結体及びその製造方法
CN118007029A (zh) * 2024-04-09 2024-05-10 广东美的制冷设备有限公司 用于3d打印注塑模具的铁铜钼合金模具钢及其制备方法和应用

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS549127B2 (fr) * 1971-06-28 1979-04-21
GB1580686A (en) * 1976-01-02 1980-12-03 Brico Eng Sintered piston rings sealing rings and processes for their manufacture
AT382334B (de) * 1985-04-30 1987-02-10 Miba Sintermetall Ag Nocken zum aufschrumpfen auf einer nockenwelle und verfahren zur herstellung eines solchen nockens durch sintern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011109473A1 (de) 2011-08-04 2012-03-15 Daimler Ag Sinterbauteil und Nockenwelle

Also Published As

Publication number Publication date
US5082433A (en) 1992-01-21
KR910011370A (ko) 1991-08-07
EP0435019A1 (fr) 1991-07-03
KR0183390B1 (ko) 1999-04-01
CA2032300A1 (fr) 1991-06-21
ES2075122T3 (es) 1995-10-01
CA2032300C (fr) 2001-07-24
JPH03291361A (ja) 1991-12-20
DE59009097D1 (de) 1995-06-22
DE3942091C1 (fr) 1991-08-14

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