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EP1776487A1 - Materiau de fonte tres resistant, resistant a l'usure et a la corrosion - Google Patents

Materiau de fonte tres resistant, resistant a l'usure et a la corrosion

Info

Publication number
EP1776487A1
EP1776487A1 EP05747731A EP05747731A EP1776487A1 EP 1776487 A1 EP1776487 A1 EP 1776487A1 EP 05747731 A EP05747731 A EP 05747731A EP 05747731 A EP05747731 A EP 05747731A EP 1776487 A1 EP1776487 A1 EP 1776487A1
Authority
EP
European Patent Office
Prior art keywords
max
cast iron
iron material
material according
ferrite
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
EP05747731A
Other languages
German (de)
English (en)
Other versions
EP1776487B1 (fr
Inventor
Steffen Hoppe
Wilfried Langner
Thomas Gerle
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 EP1776487A1 publication Critical patent/EP1776487A1/fr
Application granted granted Critical
Publication of EP1776487B1 publication Critical patent/EP1776487B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/006—Graphite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

Definitions

  • the present invention relates to a cast iron material and in particular piston rings, which have such a cast iron material as the base body.
  • the present invention relates to a new cast iron material comprising needle-like ferrite with certain proportions of austenite, martensite and / or pearlite.
  • Cast iron materials can be in various microstructures that can be adjusted by using specific composition and / or process parameters.
  • a cast iron material having a bainitic to martensitic basic structure, which is obtained by a heat treatment, is described for example in DE 24 28 821 A.
  • the basic structure contains lamellar to nodular graphite precipitates to provide runflat properties.
  • the blank after annealing is annealed at a temperature in the range of 900 ° C and 1050 ° C to dissolve the cementite to produce a black malleable cast iron.
  • a temperature in the range of 900 ° C and 1050 ° C to dissolve the cementite to produce a black malleable cast iron.
  • the annealing time can be reduced by adding sulfur in a significant amount to the starting material.
  • Cast iron or cast iron alloys are commonly used to make highly stressed parts of internal combustion engines, such as piston rings.
  • piston rings are subject to an increasing load, such as, for example, compression pressure, combustion temperature, reduction of lubricating film, and their functional properties, such as wear, Fire resistance, Microwelding, corrosion resistance significantly influence.
  • Piston rings seal the gap between the piston head and the cylinder wall with respect to the combustion chamber. During the up and down movement of the piston slides the
  • Piston ring 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
  • Compression rings in highly stressed engines such as diesel engines or 2-stroke diesel engines, for example, preferably as cast piston rings with a Lauffiambaenbe harshung, such as chrome-ceramic coating, thermal spray coating, PVD layer or inlet layer, designed.
  • EP 1 384 794 A1 discloses a cast iron material for piston rings which has a specific chemical composition and is subjected to a heat treatment comprising an austenizing treatment followed by an isothermal hardening process.
  • a heat treatment comprising an austenizing treatment followed by an isothermal hardening process.
  • the use of spheroidal graphite-forming additives results in a spherulitic material.
  • the cast iron material must have a matrix of pearlite with small amounts of ferrite for optimum heat treatment. Although such a heat treatment can improve the mechanical properties of cast iron materials, the cost of the heat treatment makes the product more expensive.
  • Object of the present invention is to provide a cast iron material having an increased wear resistance and corrosion resistance, without the Manufacturing costs are increased and to provide a piston ring, which has a reduced risk of breakage and guarantees the increased functional performance over long lifetimes with increased mechanical-dynamic load.
  • the object is achieved by a cast iron material according to claim 1, a piston ring according to claim 11.
  • a cast iron material which has a matrix comprising needle-like ferrite and / or martensite with proportions of austenite and / or pearlite.
  • the matrix has phase components which are adjusted in the matrix structure such that a phase mixture comprises> 50% needle-like ferrite, ⁇ 20% austenite, ⁇ 30% martensite, ⁇ 50% pearlite and ⁇ 15% carbides.
  • the proportions of the phase mixture are as follows:> 65% needlead ferrite, ⁇ 5% austenite, ⁇ 10% martensite, ⁇ 10% perlite and ⁇ 7% carbides.
  • the ferrite can be cementite-free needle-like ferrite or cemented needle-like ferrite and mixtures thereof.
  • the cast iron material according to the invention preferably has the following chemical composition in% by weight: carbon 3.0 to 4.2; Silicon 1.0 to 3.5; Manganese max. 1.0; Phosphorus max. 0.4; Sulfur max. 0.1; Chrome max. 5.0; Copper max. 3.0; Magnesium max. 0.08; Tin max. 0.3; Molybdenum max. 3.0; Vanadium max. 1.0, nickel 1.0 to 6.0; Remaining iron and manufacturing impurities.
  • This cast iron material is characterized in particular by a high corrosion resistance, wear resistance and bending strength.
  • the cast iron material according to the invention has excellent toughness, which has a particularly positive effect on the tendency to fracture.
  • the cast iron material has the following composition in weight percent: carbon 3.0 to 4.0; Silicon 1.0 to 3.0; Manganese max. 1.0; Phosphorus max. 0.3; Sulfur max. 0.05; Chrome max. 0.5; Copper 0.5 to 3.0; Magnesium max. 0.08; Tin max. 0.25; Vanadium max. 0.1, molybdenum max. 0.08; Nickel 1.0 to 4.0; Remaining iron and manufacturing impurities.
  • the properties of the cast iron material according to the invention can furthermore be controlled specifically in which the type of graphite formation present in the material is varied in a spherulitic and / or vermicullary or lamellar manner.
  • Vermicular graphite is "worm-shaped" graphite, which lies in its morphology between lamellar graphite and nodular graphite and is generally abbreviated GJV Because of the vermicular graphite formation, the properties differ substantially from the ferrite / pearlite ratio in the basic structure and from the proportion of the accompanying nodular graphite. Commonly used here are 80-90% vermicular graphite, the remainder being nodular graphite, which makes GJV suitable for thermally stressed components, such as piston rings, which are subject to high temperature changes.
  • Cast iron with spherulitic or "spherical” graphite formation is also known as GJS, in which the majority of the carbon in the casting state is precipitated in the form of spheroidal graphite.
  • a lamellargraphitic cast iron material has a very good coefficient of thermal conductivity and a very good damping, while a spherulitic cast iron material has the advantage of a significantly reduced notch effect and significantly higher tensile strength and ductility.
  • a vermiculargraphitic cast iron material has higher strength properties than other graphite formations.
  • a graphite transfer to a cast iron material with vermicular graphite formation (GJV) or spherulitic graphite formation (GJS) can be achieved, for example, by a Mg treatment, as known from the prior art.
  • the cast iron material may further contain an element selected from the group consisting of titanium, niobium, tantalum, tungsten, boron, tellurium or bismuth or combinations thereof, in particular in an amount of up to 0.1% by weight. Such elements easily form carbides and improve wear resistance.
  • the cast iron material may contain an additive which is selected from the group consisting of cobalt, antimony, calcium, strontium, aluminum, lanthanum, cerium, rare earth metals or combinations thereof, preferably in an amount of up to 0.1% by weight. , Rare earth metals.
  • These elements and additives can be impurities due to production or can be added to the melt during the process for producing the cast iron material according to the invention.
  • the cast iron material may contain lead, zinc, nitrogen and other ingredients not explicitly mentioned in an amount of up to 0.1 wt .-%.
  • the proportion of starting materials, constituents, ingredients, elements, additives can be adjusted by various methods known to the person skilled in the art.
  • the chemical composition is adjusted in particular depending on the casting module.
  • the cast iron material according to the present invention is particularly suitable for the production of piston rings.
  • the piston rings may also be partially or wholly, inductively hardened, nitrided or coated on their running surfaces and / or their flank surfaces.
  • the contents of nickel, copper, tin and chrome have a positive influence on the corrosion resistance of the material. This is particularly important for 2-stroke engines, because the piston rings are exposed there aggressive media, therefore, the inventive
  • Cast iron material ideally suited as a basic structure for a piston ring.
  • a melt is first prepared.
  • the melt preferably has the following composition in weight percent: carbon 3.0 to 4.2; Silicon 1.0 to 3.5; Manganese max. 1.0; Phosphorus max. 0.4; Sulfur max. 0.1; Chrome max. 5.0; Copper max. 3.0; Magnesium max. 0.08; Tin max. 0.3; Vanadium max. 1.0, molybdenum max. 3.0; nickel 1.0 to 6.0; Remaining iron and manufacturing impurities.
  • a blank is produced with solidification of the melt.
  • the blank may then be further processed into a piston ring according to methods known in the art.
  • the process for producing the cast iron material is carried out without further heat treatment. For larger dimensions (Mo 1.5 cm), no additional heat treatment is required. For smaller dimensions, additional tempering may be necessary, but annealing is no longer necessary. The tempering then takes place optionally at temperatures of ⁇ 700 0 C.
  • 1 shows the cast structure of a cast iron material according to the invention in a magnification of 500: 1, which has been etched with Nital 2%.
  • the basic structure consists of approx. 60% needle-like cement-rich and cementite-free ferrite, approx. 20% perlite, approx. 10% martensite, ⁇ 3% austenite and ⁇ 7% carbides.
  • the mechanical properties of the piston ring are as follows: The hardness is 320HB2.5, the bending strength is> 1100 MPa, the exact bending strength is difficult to determine due to the high ductility of the material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne un matériau de fonte caractérisé par une matrice contenant plus de 50 % de ferrite aciculaire, moins de 20 % d'austénite, moins de 30 % de martensite, moins de 50 % de perlite et moins de 15 % de carbures.
EP05747731A 2004-08-18 2005-05-04 Materiau de fonte tres resistant, resistant a l'usure et a la corrosion Expired - Lifetime EP1776487B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410040056 DE102004040056A1 (de) 2004-08-18 2004-08-18 Hoch- und verschleißfester, korrosionsbeständiger Gusseisenwerkstoff
PCT/EP2005/004884 WO2006018054A1 (fr) 2004-08-18 2005-05-04 Materiau de fonte tres resistant, resistant a l'usure et a la corrosion

Publications (2)

Publication Number Publication Date
EP1776487A1 true EP1776487A1 (fr) 2007-04-25
EP1776487B1 EP1776487B1 (fr) 2009-08-26

Family

ID=34979703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05747731A Expired - Lifetime EP1776487B1 (fr) 2004-08-18 2005-05-04 Materiau de fonte tres resistant, resistant a l'usure et a la corrosion

Country Status (4)

Country Link
EP (1) EP1776487B1 (fr)
JP (1) JP5345316B2 (fr)
DE (2) DE102004040056A1 (fr)
WO (1) WO2006018054A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2360997C1 (ru) * 2008-02-28 2009-07-10 Юлия Алексеевна Щепочкина Чугун
RU2362827C1 (ru) * 2008-05-07 2009-07-27 Юлия Алексеевна Щепочкина Чугун
RU2391438C1 (ru) * 2009-06-03 2010-06-10 Юлия Алексеевна Щепочкина Чугун
JP2011075071A (ja) * 2009-10-01 2011-04-14 Nuovo Pignone Holding Spa 往復圧縮機用のパッキン箱ケーシング
RU2397265C1 (ru) * 2009-11-02 2010-08-20 Юлия Алексеевна Щепочкина Чугун
RU2475566C1 (ru) * 2012-02-22 2013-02-20 Юлия Алексеевна Щепочкина Чугун
RU2475565C1 (ru) * 2012-02-22 2013-02-20 Юлия Алексеевна Щепочкина Чугун
RU2508416C1 (ru) * 2013-02-19 2014-02-27 Юлия Алексеевна Щепочкина Чугун
RU2527572C1 (ru) * 2013-05-14 2014-09-10 Виктор Анатольевич Кузнецов Антифрикционный чугун
RU2525980C1 (ru) * 2013-10-21 2014-08-20 Юлия Алексеевна Щепочкина Чугун
RU2529343C1 (ru) * 2013-12-12 2014-09-27 Юлия Алексеевна Щепочкина Чугун
RU2554234C1 (ru) * 2014-04-08 2015-06-27 Юлия Алексеевна Щепочкина Чугун
CN105483508B (zh) * 2014-09-29 2018-03-13 常州朗锐铸造有限公司 铁道车辆制动盘用合金蠕墨铸铁及其熔炼方法
RU2602587C1 (ru) * 2015-08-26 2016-11-20 Общество с ограниченной ответственностью "ИТЦМ МЕТАЛЛУРГ" Аустенитный чугун с шаровидным графитом
CN105603295B (zh) * 2016-03-08 2017-07-11 上海安投机械配件有限公司 播种机用铸造零件
CN105734399B (zh) * 2016-04-06 2017-11-14 承德荣茂铸钢有限公司 一种适于半自磨机使用的奥铁体球铁磨球及加工工艺
DE102016107944A1 (de) * 2016-04-28 2017-11-02 Duktus (Production) Gmbh Verfahren zur Herstellung eines Bauteils aus duktilem Gusseisen und Bauteil aus duktilem Gusseisen
RU2624542C1 (ru) * 2016-10-10 2017-07-04 Юлия Алексеевна Щепочкина Чугун
EP3243920B1 (fr) 2017-03-24 2020-04-29 GF Casting Solutions Kunshan Co. Ltd. Alliage en fonte à graphite sphéroidal
KR102012428B1 (ko) * 2019-07-16 2019-08-20 전범서 메인 콘트롤 밸브 하우징용 고강도 c/v흑연 주철재
CN111235471A (zh) * 2019-12-12 2020-06-05 上海波赫驱动系统有限公司 一种低转速大扭矩径向马达用活塞材料及其制备方法
JP7766565B2 (ja) * 2022-08-01 2025-11-10 芝浦機械株式会社 片状黒鉛鋳鉄製品及びその製造方法

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Also Published As

Publication number Publication date
WO2006018054A1 (fr) 2006-02-23
JP5345316B2 (ja) 2013-11-20
EP1776487B1 (fr) 2009-08-26
DE102004040056A1 (de) 2006-02-23
DE502005007995D1 (de) 2009-10-08
JP2008510072A (ja) 2008-04-03

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