EP0161462B1 - Verfahren zur Herstellung von Ventilsitzringen - Google Patents

Verfahren zur Herstellung von Ventilsitzringen Download PDF

Info

Publication number
EP0161462B1
EP0161462B1 EP85104078A EP85104078A EP0161462B1 EP 0161462 B1 EP0161462 B1 EP 0161462B1 EP 85104078 A EP85104078 A EP 85104078A EP 85104078 A EP85104078 A EP 85104078A EP 0161462 B1 EP0161462 B1 EP 0161462B1
Authority
EP
European Patent Office
Prior art keywords
weight
valve seat
seat rings
rings
pressing force
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
EP85104078A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0161462A1 (de
Inventor
Michael Dipl.-Ing. Köhler
Wolfgang Petry
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.)
Bleistahl GmbH
Original Assignee
Bleistahl 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 Bleistahl GmbH filed Critical Bleistahl GmbH
Priority to AT85104078T priority Critical patent/ATE30745T1/de
Publication of EP0161462A1 publication Critical patent/EP0161462A1/de
Application granted granted Critical
Publication of EP0161462B1 publication Critical patent/EP0161462B1/de
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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • 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
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy
    • C22C33/0221—Using a mixture of prealloyed powders or a master alloy comprising S or a sulfur compound
    • 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
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49306—Valve seat making

Definitions

  • the invention relates to a method for producing valve seat rings by powder metallurgy, in which a powder mixture containing 0.8 to 1.5% by weight of graphite, 1.0 to 4% by weight of lead, 0.5 to 5% by weight. -% nickel, 1.2 to 1.8 wt .-% molybdenum, 9.6 to 14.4 wt .-% cobalt, the rest contains iron and that with a pressing force of about 40 to 60 KN / cm 2 to valve seat rings with standard dimensions is pressed, the rings are then sintered at a temperature between 1,100 and 1,200 ° C. in a neutral atmosphere and subjected to post-compression with a compressive force above 120 KN / cm 2 and optionally tempered. Post-compaction can be hot or cold compaction. The subsequent tempering can be carried out by heating the valve seat rings to a temperature above the AC 3 point for 15 minutes after compression, then cooling them and leaving them at a temperature of about 600 ° C. for 30 minutes.
  • Valve seat rings which have been produced by this process known from US Pat. No. 3,471,343 have increased heat resistance and are used for the exhaust valves of motor vehicles.
  • the Brinell hardness of the material is around 320 HB at room temperature and 205 HB at a temperature of 600 ° C.
  • the object on which the invention is based is to design the known valve seat rings in such a way that they have a sufficient service life when they are used in engines which are operated with unleaded fuel.
  • the invention consists in that molybdenum disulfide (MoS 2 ) is added to the starting powder mixture in amounts of 0.5 to 1.5% by weight.
  • MoS 2 molybdenum disulfide
  • the rings thus produced have densities of 7.4 to 7.6 g / cm 3 and hardnesses of 300 to 360 HB. They were used for long-term testing in Otto engines that were operated with unleaded petrol. In the tests with exhaust valve seat rings, it was found that the wear properties required for operation with unleaded petrol were significantly improved compared to the valve seat rings used as standard, from which the invention is based on the prior art.

Landscapes

  • 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)
  • Lift Valve (AREA)
  • Taps Or Cocks (AREA)
EP85104078A 1984-04-11 1985-04-03 Verfahren zur Herstellung von Ventilsitzringen Expired EP0161462B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104078T ATE30745T1 (de) 1984-04-11 1985-04-03 Verfahren zur herstellung von ventilsitzringen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3413593A DE3413593C1 (de) 1984-04-11 1984-04-11 Verfahren zur Herstellung von Ventilsitzringen
DE3413593 1984-04-11

Publications (2)

Publication Number Publication Date
EP0161462A1 EP0161462A1 (de) 1985-11-21
EP0161462B1 true EP0161462B1 (de) 1987-11-11

Family

ID=6233246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104078A Expired EP0161462B1 (de) 1984-04-11 1985-04-03 Verfahren zur Herstellung von Ventilsitzringen

Country Status (10)

Country Link
US (1) US4599110A (enExample)
EP (1) EP0161462B1 (enExample)
JP (1) JPS60218403A (enExample)
KR (1) KR920001584B1 (enExample)
AT (1) ATE30745T1 (enExample)
BR (1) BR8501693A (enExample)
DD (1) DD228192A5 (enExample)
DE (2) DE3413593C1 (enExample)
ES (1) ES8606803A1 (enExample)
MX (1) MX166958B (enExample)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988000621A1 (fr) * 1986-07-14 1988-01-28 Sumitomo Electric Industries, Ltd. Alliage fritte resistant a l'abrasion et son procede de production
JP2773747B2 (ja) * 1987-03-12 1998-07-09 三菱マテリアル株式会社 Ｆｅ基焼結合金製バルブシート
US5060374A (en) * 1989-06-05 1991-10-29 Electric Power Research Institute, Inc. Method for fabricating a valve
US5256184A (en) * 1991-04-15 1993-10-26 Trw Inc. Machinable and wear resistant valve seat insert alloy
US5872322A (en) * 1997-02-03 1999-02-16 Ford Global Technologies, Inc. Liquid phase sintered powder metal articles
RU2190681C2 (ru) * 2000-05-31 2002-10-10 Тюменский государственный нефтегазовый университет Способ получения износостойкого композиционного материала на основе карбида титана
DE10336407B4 (de) * 2003-08-06 2007-03-29 Bleistahl-Produktions Gmbh & Co. Kg Pulvermetallurgisch hergestellte Lagerteile für Turbolader sowie Verfahren zur Herstellung solcher Lagerteile
WO2006034727A1 (de) * 2004-09-29 2006-04-06 Bleistahl-Produktions Gmbh & Co. Kg Pulvermetallurgisch hergestellte ventilsitzringe sowie verfahren zur herstellung solcher ventilsitzringe
WO2006034726A1 (de) * 2004-09-29 2006-04-06 Bleistahl-Produktions Gmbh & Co. Kg Pulvermetallurgisch hergestellte lagerteile für turbolader sowie verfahren zur herstellung solcher lagerteile
JP5529730B2 (ja) * 2007-06-13 2014-06-25 ジーケーエヌ シンター メタルズ、エル・エル・シー 金属粉末部品の公差改善
JP5604981B2 (ja) * 2009-05-28 2014-10-15 Ｊｆｅスチール株式会社 粉末冶金用鉄基混合粉末
KR101046418B1 (ko) * 2010-06-11 2011-07-05 (주)씬터온 밸브시트 및 그 제조공정
US8389129B2 (en) 2010-07-09 2013-03-05 Climax Engineered Materials, Llc Low-friction surface coatings and methods for producing same
US8038760B1 (en) 2010-07-09 2011-10-18 Climax Engineered Materials, Llc Molybdenum/molybdenum disulfide metal articles and methods for producing same
CN102380613B (zh) * 2010-08-26 2013-08-14 东睦新材料集团股份有限公司 一种粉末冶金制冷压缩机阀片的制备方法
US9790448B2 (en) 2012-07-19 2017-10-17 Climax Engineered Materials, Llc Spherical copper/molybdenum disulfide powders, metal articles, and methods for producing same
DE102017218123A1 (de) * 2017-10-11 2019-04-11 Mahle International Gmbh Verfahren zum Herstellen eines Ventilsitzrings auf pulvermetallurgischem Wege

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331552A (en) * 1940-09-23 1943-10-12 Heidel Edward Henry Heel patch for locomotive siphons
GB1035216A (en) * 1962-03-28 1966-07-06 Gert Deventer Method of and apparatus for fabricating self-lubricating articles or components, and articles or components made by the method
GB1088588A (en) * 1965-05-07 1967-10-25 Max Koehler Sintered iron-base materials
CA965996A (en) * 1970-09-03 1975-04-15 Sumitomo Electric Industries, Ltd. Valve seat material for internal combustion engines
JPS4937808A (enExample) * 1972-08-16 1974-04-08
US4035159A (en) * 1976-03-03 1977-07-12 Toyota Jidosha Kogyo Kabushiki Kaisha Iron-base sintered alloy for valve seat
US4204031A (en) * 1976-12-06 1980-05-20 Riken Corporation Iron-base sintered alloy for valve seat and its manufacture
GB2087436B (en) * 1980-11-19 1985-06-19 Brico Eng Sintered ferrous alloys

Also Published As

Publication number Publication date
ATE30745T1 (de) 1987-11-15
JPH0580521B2 (enExample) 1993-11-09
JPS60218403A (ja) 1985-11-01
DD228192A5 (de) 1985-10-09
ES541734A0 (es) 1986-05-16
DE3413593C1 (de) 1985-11-07
DE3560952D1 (en) 1987-12-17
KR850007744A (ko) 1985-12-09
EP0161462A1 (de) 1985-11-21
US4599110A (en) 1986-07-08
MX166958B (es) 1993-02-15
KR920001584B1 (ko) 1992-02-20
ES8606803A1 (es) 1986-05-16
BR8501693A (pt) 1985-12-10

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