WO2005031127A1 - Guide de soupape fabrique par metallurgie des poudres - Google Patents

Guide de soupape fabrique par metallurgie des poudres Download PDF

Info

Publication number
WO2005031127A1
WO2005031127A1 PCT/EP2004/010476 EP2004010476W WO2005031127A1 WO 2005031127 A1 WO2005031127 A1 WO 2005031127A1 EP 2004010476 W EP2004010476 W EP 2004010476W WO 2005031127 A1 WO2005031127 A1 WO 2005031127A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
valve guide
weight
valve
guide according
Prior art date
Application number
PCT/EP2004/010476
Other languages
German (de)
English (en)
Inventor
Jürgen Siebert
Edgar Biallas
Gerd Krüger
Original Assignee
Bleistahl-Produktions Gmbh & Co. Kg
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-Produktions Gmbh & Co. Kg filed Critical Bleistahl-Produktions Gmbh & Co. Kg
Publication of WO2005031127A1 publication Critical patent/WO2005031127A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1146—After-treatment maintaining the porosity
    • 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
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0475—Impregnated alloys
    • 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%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the invention relates to a powder metallurgically manufactured valve guide for internal combustion engines with a uniform pore distribution.
  • Valve guides are important components of the valve train and have the task of guiding the oscillating valve so that it is always correctly positioned in the sealing seat of the valve seat ring.
  • This tribological system is formed from the valve stem and valve guide.
  • Lubrication is provided by engine oil, which is supplied through an oil leakage flow through the gap between the valve stem and valve guide.
  • engine oil which is supplied through an oil leakage flow through the gap between the valve stem and valve guide.
  • Valve guides are made from formed brass and cast iron qualities as well as powder metallurgy. Copper, phosphorus and tin are often alloyed into valve guides manufactured using powder metallurgy. The structure is generally ferritic / pearlitic.
  • the alloyed copper improves the dimensional stability during sintering.
  • the improvement in thermal conductivity and some mechanical properties such as hardness and strength achieved by the copper components is also desirable.
  • the copper reacts to form a low-melting bronze phase. This leads to liquid phases even at relatively low sintering temperatures and consequently to higher density in a sintered component.
  • Sulfur fractions in the form of MnS and MoS 2 as well as graphite improve the emergency running properties due to their inherent lubricating effect.
  • Valve guides manufactured using powder metallurgy have a relatively high proportion of pores, which is reflected in the density of generally significantly less than 7.1 g / cm 3 . This proportion of pores plays an essential role in lubrication. Oil stored in the pores serves as basic lubrication between the valve stem and valve guide in the start-up phase of internal combustion engines.
  • the sintered valve guides Because of their porosity, the sintered valve guides have the advantages described above for basic lubrication, especially in the start-up phase of an internal combustion engine, but this advantage is often bought with increased oil consumption. Due to the high temperatures prevailing in the engine and the porosity that covers the entire sintered body, oil losses occur, particularly on the cam side in the area of the free projection in the cylinder head in the direction of the valve stem seal. Although these losses are small at the moment, they can add up over time.
  • the oil permeability plays a role, especially in the free projection of the valve guide over the cylinder head.
  • the valve guide protrudes beyond the cylinder head, whereby this protrusion can make up several cm.
  • the oil is transported radially outward through the body of the valve guide, but at the same time also has components in the vertical direction, i. H. Oil is also transported from the channel side to the cam side within the pore system in order to exit at the end faces.
  • valve guides In such a way that the oil transport out of the cylinder head is prevented or at least severely restricted.
  • This object is achieved with a valve guide of the type described in the introduction, in which the body of the valve guide is at least partially infiltrated with copper to increase the oil and gas tightness.
  • the copper infiltration subsequently refers to copper introduced into the pore realm of the body of the valve guide, but not the copper which is introduced as an alloy component in the base body in the form of copper powder and is present in the sintered body as an integral part of the porous body. It is additionally copper introduced by infiltration, i.e. to at least partially impregnate the valve body with copper.
  • the infiltration preferably affects the cam-side part of the valve guide, i. H. the part of the valve guide which is arranged in the cylinder head remains essentially free of infiltrated copper.
  • the cam-side part of the valve guide is the part that protrudes from the cylinder head and is suitable for discharging oil in the manner described above.
  • the copper infiltration preferably detects the outside and / or end face of the body of the valve guide on its cam side. Since the aim of the invention is only to prevent oil transport, but at the same time the pore structure and the associated lubricating properties of the valve guide are fundamentally worth preserving, it is entirely sufficient to infiltrate the outlet surfaces of the body of the valve guide with copper and thus to close the pores pointing outwards close.
  • Body for valve guides has, for example, 0.40 to 0.85% by weight of C,
  • the above composition relates to the pore-containing sintered body before copper infiltration.
  • the bodies After sintering, the bodies have a high wear resistance and, moreover, an even pore distribution. They have a pearlitic basic structure with evenly distributed solid lubricant and inherent copper.
  • the valve guide bodies are impregnated with oil, known methods being used. Oil impregnation is carried out on the finished valve guide.
  • the sintered bodies before copper infiltration, have a density of more than 6.2 g / cm 3 and in particular more than 6.4 g / cm 3 .
  • the hardness is in the range from 60 to 93 HRB, in particular in the range from 79 to 83 HRB.
  • the average pore size is usually in the range from 170 to 250 ⁇ m 2 and in particular in the range from 200 to 230 ⁇ m 2 .
  • the copper infiltration preferably grasps the outside of the part of the body of the valve guide arranged outside the cylinder head, it being sufficient for the outwardly extending pores to be closed by the copper. As a rule, this is achieved with copper infiltration, which covers approximately 10 to 50% of the wall of the body, seen from the outside, and in particular approximately 20 to 30%.
  • copper infiltration offers advantages in mechanical reworking, in which the roughness of the surface is improved and "cut" pores are filled get the valve guide.
  • a pressed base body is brought into close contact with a copper body which is matched to its weight and is sintered together.
  • the copper fills the pores of the base body and increases the density of the blank; in the infiltrated area, the pores are closed and the required tightness of the component is achieved.
  • the copper body as a tube or sleeve is placed over the outer contour of the valve guide body, so that the desired infiltration is achieved in the outer region.
  • Fig. 1 shows in section a valve guide with a partial copper filling in the cam-side area
  • Fig. 2 individual steps in the manufacture of a valve guide partially filled with copper.
  • 1 shows in section a valve guide 1 with the cam-side end 2 and the motor-side or channel-side end 3. 4 denotes the bore in which the valve stem runs.
  • area 5 denotes the part of the body made of sintered metal that has not been infiltrated with copper.
  • the edge area 6 was infiltrated with copper on the cam side, the infiltration zone extending along the outer wall up to the end face on the end face as far as the inner wall with the actual valve guide.
  • the pores are completely sealed oil-and gas-tight with absorbed copper. It is the area of the valve guide 1 on the cam side that protrudes from the cylinder head and - in the porous state - is responsible for oil losses.
  • FIG. 2a shows a valve guide 1 made of sintered metal with a multiplicity of open pores 7.
  • the valve guide 1 is covered on the valve side with a copper disk 8 and subjected to a sintering process.
  • the sintering process leads to melting of the copper and infiltration of the open pores.
  • the valve guide on the valve side is infiltrated with copper to approximately 80% of its height (reference number 6), while the end facing away from the valve still has open pores 7.

Landscapes

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

Abstract

L'invention concerne un guide de soupape (1) fabriqué par métallurgie des poudres, destiné à des moteurs à combustion interne, présentant une répartition uniforme des pores. Selon l'invention, le corps (5) est au moins partiellement infiltré de cuivre afin d'en améliorer l'étanchéité à l'huile et aux gaz. L'invention concerne également un procédé de fabrication de tels guides de soupapes.
PCT/EP2004/010476 2003-09-18 2004-09-17 Guide de soupape fabrique par metallurgie des poudres WO2005031127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343680.4 2003-09-18
DE10343680.4A DE10343680B4 (de) 2003-09-18 2003-09-18 Pulvermetallurgisch gefertigte Ventilführung

Publications (1)

Publication Number Publication Date
WO2005031127A1 true WO2005031127A1 (fr) 2005-04-07

Family

ID=34305995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/010476 WO2005031127A1 (fr) 2003-09-18 2004-09-17 Guide de soupape fabrique par metallurgie des poudres

Country Status (2)

Country Link
DE (1) DE10343680B4 (fr)
WO (1) WO2005031127A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112375991A (zh) * 2020-11-11 2021-02-19 安徽金亿新材料股份有限公司 一种高热传导耐磨气门导管材料及其制备方法
CN114769598A (zh) * 2022-04-28 2022-07-22 安庆帝伯粉末冶金有限公司 气门导管渗铜烧结方法
CN115127008A (zh) * 2021-04-27 2022-09-30 帝伯爱尔株式会社 烧结合金制阀导管和烧结合金制阀导管的制造方法
CN115138852A (zh) * 2022-07-01 2022-10-04 安庆帝伯粉末冶金有限公司 高导热高耐磨渗铜气门导管
EP3940206B1 (fr) * 2017-07-10 2023-09-27 Eaton Intelligent Power Limited Suiveur de doigt de rouleau de commutation pour un dispositif de commande de soupapes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013021059A1 (de) 2013-12-18 2015-06-18 Bleistahl-Produktions Gmbh & Co Kg. Double/Triple layer Ventilführung
DE102015109621A1 (de) * 2015-06-16 2016-12-22 Bleistahl-Produktions Gmbh & Co Kg. Ventilführung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780073A (en) * 1954-06-23 1957-07-31 Birmingham Small Arms Co Ltd Improvements in or relating to valve-guides for internal combustion engines
US4702771A (en) * 1985-04-17 1987-10-27 Hitachi Powdered Metals Co., Ltd. Wear-resistant, sintered iron alloy and process for producing the same
EP0407596A1 (fr) * 1988-10-26 1991-01-16 Mitsubishi Materials Corporation Alliage fritte a base de cuivre
EP0481763A1 (fr) * 1990-10-18 1992-04-22 Hitachi Powdered Metals Co., Ltd. Pièces métalliques frittées et procédé de leur production
US6112803A (en) * 1996-03-29 2000-09-05 Bleistahl Produktions-Gmbh & Co. Kg Process for producing cylinder heads for internal combustion engines
US6616726B2 (en) * 2000-08-31 2003-09-09 Hitachi Powdered Metals Co., Ltd. Material for valve guides

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775024A (en) * 1953-05-29 1956-12-25 Thompson Prod Inc Powder metal multi-ring bushing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780073A (en) * 1954-06-23 1957-07-31 Birmingham Small Arms Co Ltd Improvements in or relating to valve-guides for internal combustion engines
US4702771A (en) * 1985-04-17 1987-10-27 Hitachi Powdered Metals Co., Ltd. Wear-resistant, sintered iron alloy and process for producing the same
EP0407596A1 (fr) * 1988-10-26 1991-01-16 Mitsubishi Materials Corporation Alliage fritte a base de cuivre
EP0481763A1 (fr) * 1990-10-18 1992-04-22 Hitachi Powdered Metals Co., Ltd. Pièces métalliques frittées et procédé de leur production
US6112803A (en) * 1996-03-29 2000-09-05 Bleistahl Produktions-Gmbh & Co. Kg Process for producing cylinder heads for internal combustion engines
US6616726B2 (en) * 2000-08-31 2003-09-09 Hitachi Powdered Metals Co., Ltd. Material for valve guides

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3940206B1 (fr) * 2017-07-10 2023-09-27 Eaton Intelligent Power Limited Suiveur de doigt de rouleau de commutation pour un dispositif de commande de soupapes
CN112375991A (zh) * 2020-11-11 2021-02-19 安徽金亿新材料股份有限公司 一种高热传导耐磨气门导管材料及其制备方法
CN115127008A (zh) * 2021-04-27 2022-09-30 帝伯爱尔株式会社 烧结合金制阀导管和烧结合金制阀导管的制造方法
EP4130444A1 (fr) * 2021-04-27 2023-02-08 TPR Co., Ltd. Guide de soupape en alliage fritté, et procédé de fabrication d'un guide de soupape en alliage fritté
EP4130444A4 (fr) * 2021-04-27 2023-07-19 TPR Co., Ltd. Guide de soupape en alliage fritté, et procédé de fabrication d'un guide de soupape en alliage fritté
US11719138B2 (en) 2021-04-27 2023-08-08 Tpr Co., Ltd. Sintered alloy valve guide and method of producing sintered alloy valve guide
CN114769598A (zh) * 2022-04-28 2022-07-22 安庆帝伯粉末冶金有限公司 气门导管渗铜烧结方法
CN114769598B (zh) * 2022-04-28 2024-04-09 安庆帝伯粉末冶金有限公司 气门导管渗铜烧结方法
CN115138852A (zh) * 2022-07-01 2022-10-04 安庆帝伯粉末冶金有限公司 高导热高耐磨渗铜气门导管
CN115138852B (zh) * 2022-07-01 2024-05-10 安庆帝伯粉末冶金有限公司 高导热高耐磨渗铜气门导管

Also Published As

Publication number Publication date
DE10343680A1 (de) 2005-04-14
DE10343680B4 (de) 2017-08-17

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