EP1846583B1 - Materiau de fonte de fer fortement allie, utilisation de ce materiau pour des composants soumis a des contraintes thermiques elevees et composant correspondant - Google Patents

Materiau de fonte de fer fortement allie, utilisation de ce materiau pour des composants soumis a des contraintes thermiques elevees et composant correspondant Download PDF

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Publication number
EP1846583B1
EP1846583B1 EP06708061A EP06708061A EP1846583B1 EP 1846583 B1 EP1846583 B1 EP 1846583B1 EP 06708061 A EP06708061 A EP 06708061A EP 06708061 A EP06708061 A EP 06708061A EP 1846583 B1 EP1846583 B1 EP 1846583B1
Authority
EP
European Patent Office
Prior art keywords
structural component
thermal stress
high thermal
cast iron
previous
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
EP06708061A
Other languages
German (de)
English (en)
Other versions
EP1846583A1 (fr
Inventor
Horst Keil
Dietmar Hahn
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.)
Eisenwerk Erla GmbH
Original Assignee
Eisenwerk Erla 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 Eisenwerk Erla GmbH filed Critical Eisenwerk Erla GmbH
Publication of EP1846583A1 publication Critical patent/EP1846583A1/fr
Application granted granted Critical
Publication of EP1846583B1 publication Critical patent/EP1846583B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/02—Corrosion resistive metals
    • F01N2530/04—Steel alloys, e.g. stainless steel

Definitions

  • the present invention relates to a high alloyed cast iron material having an austenitic structure and a spherical graphite formation.
  • the material of the invention is preferably suitable for thermally highly stressed parts of an engine, in particular the exhaust system of an engine, but is also well suited for other thermally highly stressed components.
  • austenitic nodular graphite cast iron alloys are known in the art under the trade name Ni-Resist. These alloys, which are described in EN 13835 as EN-GJSA XNi 35 (or according to ASTM 439 as D5), in addition to good mechanical properties, have a very high heat resistance, good scaling resistance and high thermal shock resistance. They are therefore in the prior art used for the mass production of thermally highly stressed engine components, in particular for exhaust manifold and / or turbocharger housing highly compressed or supercharged engines. These alloys are inexpensive and can be shed well. They have an already very high heat resistance, which is specified in the EN 13835 with up to 1050 ° Celsius.
  • the object of the present invention is to propose an austenitic cast iron material which has a very high thermal shock resistance, even with thin-walled components.
  • a high-alloyed cast iron material with austenitic structure and spherical graphite formation has, inter alia, the following Ingredients in weight percent on: Carbon ⁇ 2.0%; Silicon 2.0 - 6.0%; Nickel 29 - 36%; Chromium 1.0 - 2.5%; Niobium 0.1-1.0%; Molybdenum 0.1 - 2.5%.
  • the invention is defined in claim 1.
  • molybdenum and niobium are alloyed in the stated proportions.
  • the thermal shock resistance of such alloys can be increased, but without causing embrittlement of the material by carbide formation. Furthermore, with an alloy according to the invention, the strength of the material at elevated temperatures and the scale resistance can be improved.
  • the alloy according to the invention in this case has a comparatively low coefficient of thermal expansion, so that the risk of cracking is reduced during thermal cycling.
  • the carbon content of the alloy is limited to 2% to avoid carbide formation.
  • the carbon content is adjusted so that nevertheless a good flowability and castability of the melt is achieved.
  • the silicon content of the alloy acts in a known manner as a deoxidizer and in this case improves the resistance to hot gas corrosion.
  • the material according to the invention nevertheless has an advantageous low thermal expansion coefficient.
  • Chromium serves to improve the oxidation resistance at high temperatures.
  • the chromium content is currently limited to 2.5%.
  • the invention provides that the cast iron material has a manganese content of 0.5-1.5%.
  • the manganese content of an alloy influences the casting properties on the one hand, but also impairs graphite precipitation, so that the manganese content here is preferably limited to 1.5%.
  • the material has a phosphorus content of less than 0.1%, since a higher phosphorus content could also lead to embrittlement of the material. Furthermore, it is advantageous if the material has a copper content of less than 0.5%.
  • a particularly preferred embodiment of the invention provides that the cast iron material has a nickel content of 34-36%.
  • the nickel base ensures the formation of an austenitic basic structure.
  • a further advantageous embodiment of the invention provides that the material preferably has a chromium content of 1.5-2.5% in order to improve the high-temperature strength and oxidation resistance.
  • the cast iron according to the present invention has an increased temperature resistance over conventional austenitic cast iron alloys with nodular graphite and nickel as the main carrier (D5).
  • the cast iron according to the invention is therefore well suited for use in extremely thin-walled components with a wall thickness of 3 -6 mm under very high temperatures.
  • the material of the invention is thus ideal for use in thermally highly stressed components.
  • Thin-walled components of the cast iron material according to the invention have, according to current knowledge, a resistance of up to about 985 ° Celsius.
  • this high-alloy cast iron material is therefore used for parts of the exhaust system of an engine.
  • the material is suitable for exhaust manifold or turbocharger housing.
  • the material can be used in parts of the exhaust system of highly compressed or supercharged engines, in which exhaust gas temperatures of up to 1100 ° C occur.
  • the material is suitable for use in integral housings, ie housings which combined exhaust manifold and turbine housing of an exhaust gas turbocharger.
  • thermally highly stressed components in particular the exhaust system of an engine, consist of a cast iron material of the properties described above.
  • the cast iron of the present invention can therefore replace the conventional materials used for exhaust systems.
  • the cast iron can be manufactured and processed in substantial accordance with conventional methods.
  • the components can be subjected to an annealing treatment to homogenize the microstructure, whereby a better distribution of the carbides is achieved.
  • the cast iron material according to the invention in the shear crack test exhibited an 8% increase in thermal shock resistance compared to conventional class D5 alloys (ASTM 439). In the highway endurance test improvements of up to 30% could be determined with the material according to the invention.
  • the invention is particularly suitable for components of the exhaust system of a motor vehicle, but not limited to these. Variations and combinations within the scope of the claims also fall under the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Supercharger (AREA)
  • Exhaust Silencers (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (10)

  1. Matériau en fonte fortement alliée à structure austénitique et constitution à sphérules de graphite, offrant une résistance élevée aux variations de température et appliqué de préférence à la fabrication de moteurs, caractérisé en ce que ce matériau contient les éléments suivants selon les pourcentages pondéraux indiqués : carbone < 2,0 % silicium 2,0 - 6,0 % nickel 29 - 36 % chrome 1,0 - 2,5 % niobium 0,1 - 1,0 % molybdène 0,1 - 2,5 % manganèse 0,5 - 1,5 % phosphore < 0,1 % cuivre < 0,5 %
  2. Matériau en fonte selon la revendication précédente, caractérisé en ce que le matériau contient de préférence un pourcentage pondéral de nickel de 34 à 36 %.
  3. Matériau en fonte selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau contient de préférence un pourcentage pondéral de chrome de 1,5 à 2,5 %.
  4. Application d'un matériau de fonte d'acier fortement alliée selon l'une quelconque des revendications précédentes à la fabrication de composants de moteur soumis à de fortes sollicitations thermiques.
  5. Application selon la revendication précédente, caractérisée en ce que le composant à forte sollicitation thermique est un élément du système d'échappement d'un moteur, en particulier un collecteur d'échappement et/ou un carter de turbocompresseur.
  6. Application selon la revendication 4 ou 5, caractérisée en ce que le composant à forte sollicitation thermique est un carter intégré.
  7. Composant à forte sollicitation thermique, appartenant en particulier au système d'échappement d'un moteur, caractérisé en ce que le composant est constitué d'un matériau en fonte d'acier selon l'une des revendications 1 à 3.
  8. Composant à forte sollicitation thermique selon la revendication précédente, caractérisé en ce que le composant est un collecteur d'échappement.
  9. Composant à forte sollicitation thermique selon la revendication 7 ou 8, caractérisé en ce que le composant est un carter de turbine d'un turbocompresseur de gaz d'échappement.
  10. Composant à forte sollicitation thermique selon l'une des revendications 7 à 9, caractérisé en ce que le composant est un carter intégré.
EP06708061A 2005-02-12 2006-02-07 Materiau de fonte de fer fortement allie, utilisation de ce materiau pour des composants soumis a des contraintes thermiques elevees et composant correspondant Not-in-force EP1846583B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005006778A DE102005006778B4 (de) 2005-02-12 2005-02-12 Hochlegierter Gußeisenwerkstoff und Verwendung des Werkstoffs für thermisch hochbelastete Bauteile
PCT/EP2006/050714 WO2006084838A1 (fr) 2005-02-12 2006-02-07 Materiau de fonte de fer fortement allie, utilisation de ce materiau pour des composants soumis a des contraintes thermiques elevees et composant correspondant

Publications (2)

Publication Number Publication Date
EP1846583A1 EP1846583A1 (fr) 2007-10-24
EP1846583B1 true EP1846583B1 (fr) 2008-12-31

Family

ID=36283724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708061A Not-in-force EP1846583B1 (fr) 2005-02-12 2006-02-07 Materiau de fonte de fer fortement allie, utilisation de ce materiau pour des composants soumis a des contraintes thermiques elevees et composant correspondant

Country Status (7)

Country Link
US (1) US20080267808A1 (fr)
EP (1) EP1846583B1 (fr)
CN (1) CN100532610C (fr)
AT (1) ATE419406T1 (fr)
CA (1) CA2599091C (fr)
DE (2) DE102005006778B4 (fr)
WO (1) WO2006084838A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8454764B2 (en) 2008-02-25 2013-06-04 Wescast Industries, Inc. Ni-25 heat-resistant nodular graphite cast iron for use in exhaust systems
KR20110057213A (ko) * 2008-09-25 2011-05-31 보르그워너 인코퍼레이티드 터보차저 및 이를 위한 블레이드 베어링 링
US8372335B2 (en) * 2010-01-14 2013-02-12 Honeywell International Inc. Austenitic ductile cast iron
CN102560269A (zh) * 2010-12-09 2012-07-11 佳木斯畅通汽车零部件有限公司 一种铸造耐热钢发动机排气歧管
KR101984705B1 (ko) * 2011-10-20 2019-05-31 보르그워너 인코퍼레이티드 터보차저 및 이의 구성요소
CN104846265B (zh) * 2015-04-27 2017-10-17 沈阳铸锻工业有限公司 一种超低温奥氏体耐磨球铁材质及其制备方法
CN105537579A (zh) * 2015-12-24 2016-05-04 宁波天阁汽车零部件有限公司 一种涡轮增压器耐高温涡轮壳体及其制备方法
CN105604616A (zh) * 2015-12-24 2016-05-25 宁波天阁汽车零部件有限公司 一种耐高温的涡轮增压器壳体

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1410732A (en) * 1973-05-04 1975-10-22 Int Nickel Ltd Low expansion alloys
JPS5985842A (ja) * 1982-11-10 1984-05-17 Nissan Motor Co Ltd 耐熱用球状黒鉛鋳鉄
WO1994013847A1 (fr) * 1992-12-15 1994-06-23 Kabushiki Kaisha Toshiba Procede de production de fonte grise a forte resistance et a faible dilatation
DE10011154A1 (de) * 2000-03-07 2001-09-13 Mahle Gmbh Zylinderkopfeinheit mit Walzendrehschieber
FR2836155B1 (fr) * 2002-02-15 2005-01-07 Imphy Ugine Precision Alliage magnetique doux pour horlogerie

Also Published As

Publication number Publication date
CA2599091C (fr) 2014-05-06
CN101120112A (zh) 2008-02-06
WO2006084838A1 (fr) 2006-08-17
US20080267808A1 (en) 2008-10-30
DE502006002489D1 (de) 2009-02-12
CA2599091A1 (fr) 2006-08-17
DE102005006778B4 (de) 2013-10-02
DE102005006778A1 (de) 2006-08-17
CN100532610C (zh) 2009-08-26
ATE419406T1 (de) 2009-01-15
EP1846583A1 (fr) 2007-10-24

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