EP2401532B1 - Segment de piston - Google Patents

Segment de piston Download PDF

Info

Publication number
EP2401532B1
EP2401532B1 EP09744325.3A EP09744325A EP2401532B1 EP 2401532 B1 EP2401532 B1 EP 2401532B1 EP 09744325 A EP09744325 A EP 09744325A EP 2401532 B1 EP2401532 B1 EP 2401532B1
Authority
EP
European Patent Office
Prior art keywords
weight
piston ring
max
steel material
steel
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.)
Not-in-force
Application number
EP09744325.3A
Other languages
German (de)
English (en)
Other versions
EP2401532A1 (fr
Inventor
Laszlo Pelsoeczy
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.)
Federal Mogul Burscheid GmbH
Original Assignee
Federal Mogul Burscheid 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 Federal Mogul Burscheid GmbH filed Critical Federal Mogul Burscheid GmbH
Publication of EP2401532A1 publication Critical patent/EP2401532A1/fr
Application granted granted Critical
Publication of EP2401532B1 publication Critical patent/EP2401532B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium

Definitions

  • the present invention relates to a piston ring. Moreover, the present invention relates to a method for producing the piston rings according to the invention.
  • piston rings seal the gap between the piston head and the cylinder wall with respect to the combustion chamber.
  • piston piston ring slides on the one hand with its outer peripheral surface in constant resilient engagement against the cylinder wall, on the other hand slides the piston ring, due to the tilting movements of the piston, oscillating in its Kolbenringnut, with its edges alternately at the top or bottom Abut groove flank of the piston ring groove.
  • sliding against each other occurs depending on the material, a more or less severe wear, which can lead to so-called scuffing, scoring and finally to a destruction of the engine in a dry run.
  • Piston rings For the production of highly stressed parts of internal combustion engines, such as piston rings, usually cast iron materials or cast iron alloys are used. Piston rings, particularly compression rings, are subject to increasing loads in highly stressed engines, including compression peak pressure, combustion temperature, EGR, and lubricating film reduction, which significantly affect their performance characteristics, such as wear, fire resistance, microwelding, and corrosion resistance.
  • cast iron materials according to the prior art have a high risk of breakage, so that it often comes to ring breaking when using existing materials. Increased mechanical-dynamic loads lead to shorter lifetimes of piston rings or cylinder liners. Likewise, it comes to heavy wear and corrosion on the tread and flank.
  • piston rings made of high-quality steel tempered and high-alloyed, such as material 1.4112.
  • high-quality steel tempered and high-alloyed, such as material 1.4112.
  • ferrous materials with less than 2.08 wt .-% carbon as steel If the carbon content is higher, this is referred to as cast iron.
  • Steel materials have better strength and toughness properties compared with cast iron, since there is no disturbance due to free graphite in the basic structure.
  • Cast iron has a much lower melting temperature than steel. The difference can be up to 350 ° C, depending on the chemical composition. Cast iron is therefore easier to melt and cast, since a lower melting temperature means a lower casting temperature and thus a smaller shrinkage due to shrinkage, whereby the cast material has fewer voids or hot and cold cracks. A lower casting temperature also leads to a lower load on the molding material (Erosion, gas porosity, sand inclusions) and the furnace as well as lower melt costs.
  • the melting temperature of the iron material depends not only on its carbon content, but also on the "degree of saturation".
  • S c C / 4 . 26 - 1 / 3 Si + P ,
  • a saturation level of 1.0 is usually desired, wherein the cast iron has a melting temperature of 1150 ° C.
  • the degree of saturation of steel is about 0.18, depending on the chemical composition.
  • Eutectic steel has a melting temperature of 1500 ° C.
  • the degree of saturation can be significantly influenced by the Si or P content. For example, a 3% by weight higher content of silicon will be similar to a 1% higher C content. It is thus possible to produce a steel material with a C content of 1% by weight and 9.78% by weight of silicon, which has the same melting temperature as cast iron with a degree of saturation of 1.0 (C: 3.26% by weight). -%, Si: 3.0 wt .-%).
  • Piston rings of high silicon steel cast material are known in the art.
  • the silicon present in higher amounts adversely affects the hardenability of the material as its austenite transformation temperature "Ac3" is increased.
  • austenite transformation temperature "Ac3" is increased.
  • Kolberninge which have as a basic body a steel material composition containing the following elements in the specified proportion: C: 0.5 - 1.2 Wt .-% Nb: 0,0 - 7,0 Wt .-% Cr: 0.2-20.0 Wt .-% Si: 2,0 - 10,0 Wt .-% Fe: 49.0 - 97.1 Wt .-% Ti: 0,0 - 7,0 Wt .-% Mn: 0.1 - 3.0 Wt .-% V: 0,0 - 7,0 Wt .-% Not a word: 0.1 - 3.0 Wt .-% W: 0,0 - 0,5 Wt .-% B: Max.
  • the increased wear resistance is achieved according to the invention by the carbide formers niobium, titanium, vanadium and tungsten. According to the invention, it has been found that a proportion of 2.0-7.0% by weight of these carbide formers leads to good wear resistance without the machinability of the resulting material deteriorating such that the production costs would thereby increase disproportionately.
  • Table 1 gives a list of the hardness of carbides of the elements niobium, titanium, vanadium and tungsten: ⁇ b> Table 1 ⁇ / b> carbide NbC TiC VC WC W 2 C Hardness HV (50 kg) 2000 3000 2900 2200 3000
  • the piston rings according to the invention have a reduced tendency to change their shape under high heat and thus have a permanently high performance and also reduce the oil consumption.
  • the steel piston rings according to the invention furthermore have the advantage that their production with the machines and technologies necessary for the production of cast iron workpieces is made possible.
  • the production costs are equivalent to those of cast iron piston rings, which offers the manufacturer a cost advantage and a better added value.
  • material parameters can be set freely by the supplier.
  • starting materials for example, steel scrap, circulation material and alloying materials can be used.
  • the melting process takes place in an oven, preferably a cupola. Subsequently, a blank is produced with solidification of the melt.
  • the piston ring can be cast with methods known in the art, such as centrifugal casting, continuous casting, stamp pressing process, croning or preferably green sand molds.
  • the mold After cooling the piston ring, the mold is ejected and the blank obtained cleaned.
  • the quenching medium used is preferably oil.
  • nitriding of the resulting piston ring can take place after the aforementioned method steps. This can be done for example by gas nitriding, plasma nitriding or pressure nitriding.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (3)

  1. Segment de piston comportant en tant que corps de base une composition d'acier, caractérisé en ce que la composition d'acier contient les éléments suivants dans la part mentionnée, en rapport à 100 % en poids de la composition d'acier : C : 0,5 - 1,2 % en poids Cr : de 0,2 à 20,0 % en poids Fe : de 49,0 à 97,1 % en poids Mn : de 0,1 à 3,0 % en poids Mo : de 0,1 à 3,0 % en poids Nb : 0, 0 - 7,0 % en poids Si : 2,0 - 10,0 % en poids Ti : 0,0 - 7,0 % en poids V : 0, 0 - 7,0 % en poids W : 0, 0 - 0,5 % en poids B : maxi 0,5 % en poids Cu : maxi 2,0 % en poids Ni : maxi 4,0 % en poids P : maxi 0,1 % en poids Pb : maxi 0,05 % en poids S : maxi 0,05 % en poids Sn : maxi 0,05 % en poids
    la somme des parts de Nb, Ti, V et W étant de 2,0 à 7,0 % en poids et la composition d'acier contenant exclusivement des éléments choisis dans le groupe constitué de B, C, Cr, Cu, Fe, Mn, Mo, Nb, Ni, P, Pb S, Si, Sn, Ti, V et W, la somme desdits éléments étant de 100 % en poids.
  2. Procédé de fabrication d'un segment de piston selon la revendication 1, la fabrication de la composition d'acier comprenant les étapes suivantes :
    a. de la production d'une masse en fusion des matières de départ et
    b. de la coulée de la masse en fusion dans un moule préfabriqué,
    ainsi que le cas échéant les étapes suivantes :
    c. de l'austénitisation de la composition d'acier au-delà de sa température Ac3,
    d. de la trempe de la composition d'acier dans un milieu de trempe adapté et
    e. du revenu de la composition d'acier à une température dans l'ordre de 400 à 700°C dans un four à atmosphère contrôlée.
  3. Procédé selon la revendication 2, la fabrication de la composition d'acier comprenant par ailleurs l'étape suivante :
    f. de la nitruration de la composition d'acier obtenue.
EP09744325.3A 2009-02-26 2009-10-13 Segment de piston Not-in-force EP2401532B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009010727A DE102009010727B3 (de) 2009-02-26 2009-02-26 Stahlgusswerkstoffzusammensetzung zur Herstellung von Kolbenringen und Zylinderlaufbuchsen
PCT/EP2009/007355 WO2010097105A1 (fr) 2009-02-26 2009-10-13 Composition d'acier pour produire des segments de piston et des chemises de cylindre

Publications (2)

Publication Number Publication Date
EP2401532A1 EP2401532A1 (fr) 2012-01-04
EP2401532B1 true EP2401532B1 (fr) 2017-08-16

Family

ID=41506518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744325.3A Not-in-force EP2401532B1 (fr) 2009-02-26 2009-10-13 Segment de piston

Country Status (9)

Country Link
US (1) US8506727B2 (fr)
EP (1) EP2401532B1 (fr)
JP (1) JP5497798B2 (fr)
KR (1) KR20110128269A (fr)
CN (1) CN102272490B (fr)
BR (1) BRPI0921528A2 (fr)
DE (1) DE102009010727B3 (fr)
PT (1) PT2401532T (fr)
WO (1) WO2010097105A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015008B3 (de) * 2009-03-26 2010-12-02 Federal-Mogul Burscheid Gmbh Kolbenringe und Zylinderlaufbuchsen
KR20140097390A (ko) * 2011-11-30 2014-08-06 페더럴-모걸 코오포레이숀 피스톤 링 용도를 위한 고 모듈러스 내마모성 회주철
UA111115C2 (uk) 2012-04-02 2016-03-25 Ейкей Стіл Пропертіс, Інк. Рентабельна феритна нержавіюча сталь
WO2014040783A1 (fr) * 2012-09-14 2014-03-20 Tata Steel Nederland Technology Bv Produits d'acier à haute résistance et de faible densité renforcé par des particules de tic présentant un module e amélioré et procédé pour la production dudit produit
CN103834872A (zh) * 2012-11-26 2014-06-04 天工爱和特钢有限公司 高耐磨性模具钢
CN104451361A (zh) * 2014-12-25 2015-03-25 常熟市瑞峰模具有限公司 乳液瓶生产用合金铸铁模具
CN104895695B (zh) * 2015-05-18 2017-09-19 宏远石油设备股份有限公司 一种柴油发动机气缸盖
CN105296870A (zh) * 2015-11-03 2016-02-03 合肥海源机械有限公司 叉车用液压油缸活塞杆制备方法
US9873928B2 (en) * 2016-03-15 2018-01-23 Federal-Mogul High strength cast iron for cylinder liners
WO2020136991A1 (fr) * 2018-12-25 2020-07-02 日鉄日新製鋼株式会社 Matériau en acier et composant
JP7336685B2 (ja) * 2018-12-25 2023-09-01 日本製鉄株式会社 調質熱処理用鋼材及び部品

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Also Published As

Publication number Publication date
EP2401532A1 (fr) 2012-01-04
JP5497798B2 (ja) 2014-05-21
KR20110128269A (ko) 2011-11-29
WO2010097105A1 (fr) 2010-09-02
JP2012518764A (ja) 2012-08-16
US8506727B2 (en) 2013-08-13
DE102009010727B3 (de) 2011-01-13
CN102272490B (zh) 2014-10-15
BRPI0921528A2 (pt) 2016-03-15
PT2401532T (pt) 2017-10-17
CN102272490A (zh) 2011-12-07
US20110311391A1 (en) 2011-12-22

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