EP1776487B1 - Hoch- und verschleissfester, korrosionsbeständiger gusseisenwerkstoff - Google Patents
Hoch- und verschleissfester, korrosionsbeständiger gusseisenwerkstoff Download PDFInfo
- Publication number
- EP1776487B1 EP1776487B1 EP05747731A EP05747731A EP1776487B1 EP 1776487 B1 EP1776487 B1 EP 1776487B1 EP 05747731 A EP05747731 A EP 05747731A EP 05747731 A EP05747731 A EP 05747731A EP 1776487 B1 EP1776487 B1 EP 1776487B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- max
- cast iron
- compression ring
- ring according
- iron material
- 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 - Fee Related
Links
Images
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 piston rings which have a base material of a cast iron material.
- the present invention relates to piston rings comprising as a base body a cast iron material comprising needle-like ferrite with certain proportions of austenite, martensite and / or perlite.
- 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 base structure produced by a heat treatment is disclosed, for example, in US Pat DE 24 28 821 A described.
- 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 disclosed in US patent no US 3,565,698 described.
- 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 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.
- the US 5,972,128 discloses a piston ring made of a cast iron material containing martensite and / or bainite in addition to carbides and graphite.
- This cast iron material contains, among other things, 0.5 to 1.2% molybdenum.
- 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 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 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 that can lead to so-called munching, scoring and finally to a destruction of the engine in a dry run.
- Compression rings in high-stress 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, thermal sprayed layer, PVD layer or inlet layer, designed.
- a cast iron material for piston rings which has a specific chemical composition and is subjected to a heat treatment
- the austenizing treatment, followed by an isothermal Hardening process includes.
- a spherulitic material is obtained.
- 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 piston ring, which has a reduced risk of breakage and guarantees the increased functional performance over long lifetimes with increased mechanical-dynamic load.
- a piston ring which comprises a cast iron material having 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> 65% needle-like 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 for the piston ring according to the invention has the following chemical composition in wt .-%: 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. 0.08; 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 for the piston ring according to the invention can furthermore be specifically controlled, 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 to GJV. Due to the vermicular graphite formation, the properties differ substantially from the ferrite / pearlite ratio in the basic structure and from the proportion of the accompanying spheroidal graphite. Usually 80-90% vermicular graphite are used here, the rest is made of spheroidal graphite. GJV is therefore suitable for thermally stressed, in particular temperature-cycled components such as piston rings.
- Cast iron with spherolitic or "spherical” graphite formation is also known as GJS.
- GJS Cast iron with spherolitic or "spherical” graphite formation
- 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 vermicular graphitic 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. Examples of modification methods are GF (Georg Fischer) converter, sandwich, flow, cored wire injection treatment.
- 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 for the piston ring 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 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 in 2-stroke engines because the piston rings are exposed to aggressive media there, therefore the cast iron material according to the invention is 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. 0.08; 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 method 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 is then optionally at temperatures of ⁇ 700 ° C.
- Fig. 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 Characteristics of the piston ring are as follows: The hardness is 320HB2.5, the bending strength is> 1100 MPa, whereby the exact bending strength is difficult to determine due to the high ductility of the material.
- the cast structure of the cast material shown in the example, which has been etched with Nital 2%, is in Fig. 1 shown in a magnification of 500: 1.
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)
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 (de) | 2004-08-18 | 2005-05-04 | Hoch- und verschleissfester, korrosionsbeständiger gusseisenwerkstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1776487A1 EP1776487A1 (de) | 2007-04-25 |
EP1776487B1 true EP1776487B1 (de) | 2009-08-26 |
Family
ID=34979703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05747731A Expired - Fee Related EP1776487B1 (de) | 2004-08-18 | 2005-05-04 | Hoch- und verschleissfester, korrosionsbeständiger gusseisenwerkstoff |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1776487B1 (ja) |
JP (1) | JP5345316B2 (ja) |
DE (2) | DE102004040056A1 (ja) |
WO (1) | WO2006018054A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2475565C1 (ru) * | 2012-02-22 | 2013-02-20 | Юлия Алексеевна Щепочкина | Чугун |
RU2475566C1 (ru) * | 2012-02-22 | 2013-02-20 | Юлия Алексеевна Щепочкина | Чугун |
RU2508416C1 (ru) * | 2013-02-19 | 2014-02-27 | Юлия Алексеевна Щепочкина | Чугун |
RU2525980C1 (ru) * | 2013-10-21 | 2014-08-20 | Юлия Алексеевна Щепочкина | Чугун |
RU2527572C1 (ru) * | 2013-05-14 | 2014-09-10 | Виктор Анатольевич Кузнецов | Антифрикционный 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 |
RU2602587C1 (ru) * | 2015-08-26 | 2016-11-20 | Общество с ограниченной ответственностью "ИТЦМ МЕТАЛЛУРГ" | Аустенитный чугун с шаровидным графитом |
RU2624542C1 (ru) * | 2016-10-10 | 2017-07-04 | Юлия Алексеевна Щепочкина | Чугун |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
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 |
EP3243920B1 (de) | 2017-03-24 | 2020-04-29 | GF Casting Solutions Kunshan Co. Ltd. | Sphärogusslegierung |
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 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
EP1460143B1 (en) * | 1996-09-02 | 2006-11-22 | Honda Giken Kogyo Kabushiki Kaisha | A process for preparing an Fe-based thixocast material |
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 DE200410040056 patent/DE102004040056A1/de not_active Ceased
-
2005
- 2005-05-04 WO PCT/EP2005/004884 patent/WO2006018054A1/de active Application Filing
- 2005-05-04 JP JP2007526221A patent/JP5345316B2/ja not_active Expired - Fee Related
- 2005-05-04 EP EP05747731A patent/EP1776487B1/de not_active Expired - Fee Related
- 2005-05-04 DE DE502005007995T patent/DE502005007995D1/de active Active
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2475565C1 (ru) * | 2012-02-22 | 2013-02-20 | Юлия Алексеевна Щепочкина | Чугун |
RU2475566C1 (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 |
RU2602587C1 (ru) * | 2015-08-26 | 2016-11-20 | Общество с ограниченной ответственностью "ИТЦМ МЕТАЛЛУРГ" | Аустенитный чугун с шаровидным графитом |
RU2624542C1 (ru) * | 2016-10-10 | 2017-07-04 | Юлия Алексеевна Щепочкина | Чугун |
Also Published As
Publication number | Publication date |
---|---|
DE502005007995D1 (de) | 2009-10-08 |
JP5345316B2 (ja) | 2013-11-20 |
EP1776487A1 (de) | 2007-04-25 |
JP2008510072A (ja) | 2008-04-03 |
DE102004040056A1 (de) | 2006-02-23 |
WO2006018054A1 (de) | 2006-02-23 |
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