EP1794336A1 - Gusseisenwerkstoff für kolbenringe - Google Patents
Gusseisenwerkstoff für kolbenringeInfo
- Publication number
- EP1794336A1 EP1794336A1 EP05743258A EP05743258A EP1794336A1 EP 1794336 A1 EP1794336 A1 EP 1794336A1 EP 05743258 A EP05743258 A EP 05743258A EP 05743258 A EP05743258 A EP 05743258A EP 1794336 A1 EP1794336 A1 EP 1794336A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cast iron
- iron material
- max
- 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
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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
Definitions
- the present invention relates to a cast iron material, in particular piston rings, which have as base body such a cast iron material.
- the present invention relates to a new cast iron material comprising needle-like ferrite with certain proportions of austenite and / or martensite.
- Cast iron materials can be in various microstructures that can be adjusted by using specific composition and / or process parameters.
- the basic structure contains lamellar to nodular graphite precipitates to provide runflat properties.
- a process for producing a pearlitic and / or ferritic cast iron is described in US 3,565,698.
- the starting material is mixed with molten metal in the melt and poured into a blank.
- the blank after annealing is annealed at a temperature in the range of 900 ° C. to 1050 ° C. to dissolve the cementite to produce the black malleable cast iron.
- the annealing time can be reduced by adding sulfur in a significant amount to the starting material.
- Cast iron materials or cast iron alloys are used to produce highly stressed parts of internal combustion engines, such as piston rings.
- Piston rings are subject to an increasing load in highly stressed engines, such as compression pressure, combustion temperature, reduction of lubricating film, which significantly influence their functional properties such as wear, fire resistance, microwelding, and corrosion resistance.
- Piston rings seal the gap between the piston head and the cylinder wall with respect to the combustion chamber.
- the 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 piston ring groove, wherein its flanks alternately bear against the upper or lower Nutenilanke the Kolbenringnut.
- sliding against each other occurs depending on the material, a more or less severe wear that can lead to so-called munching, scoring and finally to a destruction of the engine in a dry run.
- Compression rings in highly stressed engines such as diesel engines or 2-stroke diesel engines, for example, preferably as cast piston rings with a tread coating, such as chrome-ceramic coating, PVD layer, thermal spray coating or inlet layer, designed.
- a tread coating such as chrome-ceramic coating, PVD layer, thermal spray coating 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 in order to obtain mechanical properties similar to those of steels are comparable.
- a spherulitic material is obtained.
- this cast iron material must have a matrix of pearlite with small amounts of ferrite in order to experience optimum heat treatment which improves the mechanical properties of the cast iron material.
- the heat treatment produces a bainitic-austenitic matrix structure, but here there is the disadvantage of softening at higher use temperatures, where the bainitic-austenitic structure transforms into bainitic-fine-pearlitic structures. This effect prevents the use of this material in internal combustion engines, as this essential properties such as the tangential force are adversely affected.
- Object of the present invention is to provide a cast iron material having an increased wear resistance, without the production costs are increased and to provide a piston ring, which has a reduced risk of breakage and increased mechanical-dynamic load, the further functional behavior over long lifetimes guaranteed.
- the object is achieved by a cast iron material according to claim 1 and a piston ring according to claim 12.
- a cast iron material which has a matrix with phase fractions which are adjusted in the matrix structure such that a phase mixture comprises needle-like ferrite with portions of austenite and / or martensite and is subjected to a heat treatment.
- the proportions of the phases include> 50% of needlelike ferrite with ⁇ 30% austenite and ⁇ 50% martensite.
- a phase mixture of> 70% needle-like ferrite with ⁇ 30% austenite and ⁇ 30% martensite is present.
- the phase mixture consists of> 80% needle-like ferrite with ⁇ 5% austenite and ⁇ 15% martensite.
- the ferrite may be cementite-free ferrite or cemented ferrite and mixtures thereof.
- the ferrite is needle-free cementite-free ferrite and / or needle-like cementite-free ferrite.
- the ferrite preferably comprises a mixture of 50% needleless cementite-free ferrite and 50% needle-like cementite-rich ferrite, more preferably a mixture of> 70% needleless cementite-free ferrite and ⁇ 30% needle-like cementite-rich ferrite, more preferably> 85% needleless cementite-free ferrite and ⁇ 15% needlelike ferrite cementite-rich ferrite.
- the matrix structure of the cast iron material is set such that the phase mixture comprises> 70% needle-like cementitious ferrite, ⁇ 30% needle-free cementite-free ferrite, ⁇ 15% austenite and ⁇ 30% martensite.
- the cast iron material according to the invention is characterized in particular by the fact that the tangential force loss is not more than 10%, preferably not more than 5%, particularly preferably max. 3%.
- the tangential force loss is determined according to DIN ISO 6621, Part 5.
- the cast iron material according to the invention preferably has the following chemical
- composition in% by weight carbon 3.0 to 4.2; Silicon 2.0 to 3.5; Manganese max. 1.0; Phosphorus max. 0.4; Sulfur max. 0.05; Chrome max. 0.5; Copper max. 3.0; Magnesium max. 0.1; Tin max. 0.3; Vanadium max. 1.0; Molybdenum max. 1.0; Nickel max. 3.0; Remaining iron and manufacturing impurities.
- This cast iron material is characterized in particular by a high wear resistance and bending strength. At the same time, the cast iron material according to the invention has excellent toughness, which has a particularly positive effect on the tendency to breakage.
- the cast iron material has the following composition in% by weight: carbon 3.0 to 3.5; Silicon 2.5 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. 1.0; Molybdenum max. 0.08; Nickel 1.0 to 2.5; Remaining iron and manufacturing impurities.
- the cast iron material preferably has a spherulitic or "spherical” graphite formation, and such cast iron materials are also referred to as GJS.
- GJS spherulitic or "spherical” graphite formation
- a spherulitic cast iron material has the advantage of a significantly reduced notch effect and significantly higher tensile strength and ductility compared to a vermiculargraphitician or lamellargraphitician cast iron material.
- a spherulitic cast iron material can be specifically produced, for example, by adding spheroidal graphite forming additives to the cast iron material or its melt.
- One way of producing a spherulitic cast iron material is graphite transfer, for example, by a Mg treatment, as known in the art. Examples of modification methods are GF (Georg Fischer) converters, sandwich, flow, cored wire injection treatment.
- the cast iron material may further contain elements 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 wt .-%. Such elements easily form carbides and thus 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 wt .-% , Rare earth metals which act as spheroidal graphite nucleating additives, as well as NiMg, NiSiMg, FeMg or FeSiMg, are preferred. Rare earth metals include mixtures of lanthanides with oxides of other 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 lead, zinc, nitrogen and others not explicitly mentioned Containing ingredients in an amount of up to 0.1 wt .-%.
- the ingredients are included such that the sum of all said or not explicitly mentioned starting materials, ingredients, ingredients, elements, additives in each case give 100 wt .-%.
- the proportion of starting materials, constituents, ingredients, elements, additives can be adjusted by various methods known to the person skilled in the art.
- Inadequate elements for example present in elemental or oxidic form, may be added, for example, in appropriate amounts to the starting materials prior to recovery of the melt.
- an enrichment with the (or the respective) present in the depletion element (s) also take place after recovery of the melt, wherein the respective elements or iron alloys of the respective elements of the melt are added in solid or liquid form.
- the cast iron material according to the invention has a hardness in the range of 100 to 150 HRB, preferably 110 to 125 HRB.
- the bending strength of piston rings of cast iron material according to the invention is greater than 2000 MPa, preferably greater than 3000 MPa.
- the cast iron material according to the present invention is particularly suitable as a piston ring material.
- the cast iron material according to the invention is particularly suitable for the production of piston rings, in particular compression rings.
- the piston rings may also be partially or fully coated on their running surfaces and / or their flank surfaces.
- the cast iron material of the present invention may be used for similarly loaded parts as the above.
- the cast iron material continues to be used for the production of loaded machine parts of above all internal combustion engines such as gears, gear rings, sealing rings in general and packing rings.
- the material according to the invention can be used above all in the automotive and marine diesel sectors.
- a melt is first prepared.
- the melt preferably has the following composition in weight percent: carbon 3.0 to 4.2; Silicon 2.0 to 3.5; Manganese max. 1.0; Phosphorus max. 0.4;
- the blank can be cast using methods known in the art, such as centrifugal casting, continuous casting, stamping, croning or green sand molding as a single or multiple blank.
- the expert is due to the
- the method for producing the cast iron material further comprises a heat treatment consisting of austenitization with subsequent isothermal or continuous cooling and tempering treatment at max. . 550 0 C.
- Figure 1 shows the cast structure of a cast iron material according to the invention at a magnification of 1000: 1, the mitNital 2% has been etched.
- a melt was prepared. Upon solidification of the melt, a blank was prepared, which was subjected to a heat treatment.
- the basic structure or matrix of the resulting blank consists of approx. 80% needle-like cement-rich ferrite, approx. 7% needle-like cementite-free ferrite, approx. 10% martensite and ⁇ 3% austenite.
- the mechanical properties of the piston ring are as follows: The hardness is 113.1 HRB, the flexural strength is> 1600 MPa and the tangential force loss is about 3%.
- the tangential force loss was determined according to DIN ISO 6621, part 5.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410040055 DE102004040055A1 (de) | 2004-08-18 | 2004-08-18 | Gusseisenwerkstoff für Kolbenringe |
PCT/EP2005/004883 WO2006018053A1 (de) | 2004-08-18 | 2005-05-04 | Gusseisenwerkstoff für kolbenringe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1794336A1 true EP1794336A1 (de) | 2007-06-13 |
EP1794336B1 EP1794336B1 (de) | 2010-01-20 |
Family
ID=34968065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05743258A Not-in-force EP1794336B1 (de) | 2004-08-18 | 2005-05-04 | Kolbenringe aus einem gusseisenwerkstoff |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1794336B1 (de) |
JP (1) | JP2008510071A (de) |
DE (2) | DE102004040055A1 (de) |
WO (1) | WO2006018053A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4825886B2 (ja) | 2009-02-27 | 2011-11-30 | トヨタ自動車株式会社 | フェライト系球状黒鉛鋳鉄 |
EP2511394B1 (de) * | 2011-04-15 | 2015-05-27 | Siemens Aktiengesellschaft | Gusseisen mit Niob und Bauteil |
CN102206784A (zh) * | 2011-04-29 | 2011-10-05 | 吉林大学 | 一种摩擦盘材料 |
CN102268588B (zh) * | 2011-06-22 | 2013-02-20 | 山东省四方技术开发有限公司 | 钢管减径机或定径机球墨铸铁轧辊及其制备方法 |
CN102268586B (zh) * | 2011-07-31 | 2012-10-03 | 安徽省鸿申压缩机有限公司 | 耐腐蚀合金铸铁及其制备方法 |
DE102012217892A1 (de) * | 2012-10-01 | 2014-05-15 | Siemens Aktiengesellschaft | Gusseisen mit Niob und Bauteil |
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 |
RU2525979C1 (ru) * | 2013-10-21 | 2014-08-20 | Юлия Алексеевна Щепочкина | Чугун |
KR101663771B1 (ko) * | 2014-04-11 | 2016-10-11 | 유성기업 주식회사 | 덕타일 주철 피스톤 링 |
CN104152790B (zh) * | 2014-08-13 | 2016-01-06 | 乐山豪森锅具有限公司 | 一种不粘锅具材料及其制备方法 |
CN104195421A (zh) * | 2014-08-14 | 2014-12-10 | 芜湖国鼎机械制造有限公司 | 大断面球墨铸铁、铸件及其制备方法 |
CN104195422A (zh) * | 2014-08-14 | 2014-12-10 | 芜湖国鼎机械制造有限公司 | 大断面球墨铸铁、铸件及其制备方法 |
CN106048402B (zh) * | 2016-08-17 | 2018-03-09 | 河南理工大学 | 耐热疲劳蠕墨铸铁、铸铁模及其制备方法 |
KR102542938B1 (ko) * | 2017-12-08 | 2023-06-14 | 현대자동차주식회사 | 고강도 회주철 |
KR102463833B1 (ko) * | 2017-12-13 | 2022-11-07 | 현대자동차주식회사 | 내마모 코팅된 마찰부품 및 그 코팅방법 |
US20200131606A1 (en) * | 2018-10-30 | 2020-04-30 | GM Global Technology Operations LLC | High-strength nodular iron with good weldability and machinability |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3000770A (en) * | 1953-11-16 | 1961-09-19 | Eisenwerke Gelsenkirchen Ag Fa | Malleable white cast iron alloys |
FR1526120A (fr) * | 1967-04-05 | 1968-05-24 | Renault | Fonte malléable à recuit rapide |
DE2428821C3 (de) * | 1974-06-14 | 1985-11-14 | Goetze Ag, 5093 Burscheid | Verschleißfeste Gußeisenlegierung mit lamellarer bis knötchenförmiger Graphitausscheidung |
US4838956A (en) * | 1987-04-16 | 1989-06-13 | Mazda Motor Corporation | Method of producing a spheroidal graphite cast iron |
JPH08232040A (ja) * | 1995-02-24 | 1996-09-10 | Aisin Takaoka Ltd | 高靱性球状黒鉛鋳鉄およびその製造方法 |
DE19629970C1 (de) * | 1996-07-25 | 1998-03-12 | Ae Goetze Gmbh | Gußeisenlegierung für die Herstellung von Kolbenringen von Verbrennungskraftmaschinen |
EP0864662B1 (de) * | 1996-09-02 | 2006-01-04 | Honda Giken Kogyo Kabushiki Kaisha | Giessmaterial zum thixogiessen, verfahren zur herstellung von halbfestem giessmaterial zum thixogiessen, verfahren zum thixogiessen, eisenbasisgussstück und verfahren zur wärmebehandlung von eisenbasisgussstücken |
DE19720779C1 (de) * | 1997-05-17 | 1998-10-01 | Ae Goetze Gmbh | Kolbenring aus Gußeisen |
JP2000119794A (ja) * | 1998-10-14 | 2000-04-25 | Hitachi Metals Ltd | 耐水濡れ性に優れるオーステンパ球状黒鉛鋳鉄 |
ITMI20021670A1 (it) * | 2002-07-26 | 2004-01-26 | Erre Vis S P A | Ghisa sferoidale particolarmente per la realizzazione di segmenti elastici di tenuta per pistoni di motori a combustione interna |
-
2004
- 2004-08-18 DE DE200410040055 patent/DE102004040055A1/de not_active Withdrawn
-
2005
- 2005-05-04 JP JP2007526220A patent/JP2008510071A/ja active Pending
- 2005-05-04 WO PCT/EP2005/004883 patent/WO2006018053A1/de active Application Filing
- 2005-05-04 EP EP05743258A patent/EP1794336B1/de not_active Not-in-force
- 2005-05-04 DE DE502005008922T patent/DE502005008922D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006018053A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004040055A1 (de) | 2006-03-02 |
JP2008510071A (ja) | 2008-04-03 |
EP1794336B1 (de) | 2010-01-20 |
DE502005008922D1 (de) | 2010-03-11 |
WO2006018053A1 (de) | 2006-02-23 |
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