WO2003045626A2 - Graphitic cast iron of high mechanical strength - Google Patents

Graphitic cast iron of high mechanical strength Download PDF

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Publication number
WO2003045626A2
WO2003045626A2 PCT/BR2002/000165 BR0200165W WO03045626A2 WO 2003045626 A2 WO2003045626 A2 WO 2003045626A2 BR 0200165 W BR0200165 W BR 0200165W WO 03045626 A2 WO03045626 A2 WO 03045626A2
Authority
WO
WIPO (PCT)
Prior art keywords
cast iron
high mechanical
graphite
graphitic cast
content
Prior art date
Application number
PCT/BR2002/000165
Other languages
English (en)
French (fr)
Other versions
WO2003045626A3 (en
Inventor
Wilson Luiz Guesser
Original Assignee
Tupy Fundições Ltda.
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 Tupy Fundições Ltda. filed Critical Tupy Fundições Ltda.
Priority to EP02782550A priority Critical patent/EP1458518A4/de
Publication of WO2003045626A2 publication Critical patent/WO2003045626A2/en
Publication of WO2003045626A3 publication Critical patent/WO2003045626A3/en

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
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • 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 report is about a graphitic cast iron of high mechanical strength, and more specifically, a graphitic cast iron of high tensile strength with high capacity to damp vibrations, good heat conductivity, good machinability and free from solidification porosities.
  • This graphitic cast iron of high tensile strength being preferentially used in the production of internal combustion engine blocks and internal combustion engine heads.
  • cast iron As known cast iron is usually classified, according to its graphite form, in gray cast iron (graphite in the form of vein) , vermicular cast iron (graphite in the form of worms) and nodular cast iron (graphite in the form of nodules) . Each group of cast iron presents typical properties with specific uses and applications.
  • gray cast iron group due to its reasonable tensile strength (200 to 350 Mega Pascal of ultimate tensile strength) , its good heat conductivity, machinability and absence of solidification porosities even in complex geometry parts.
  • the vermicular cast iron has been increasingly applied to engine blocks and heads and to brake disks and drums, providing an ultimate tensile strength higher than that of the gray cast iron (300 to 500 Mega Pascal of ultimate tensile strength) , with intermediate values of heat conductivity.
  • Another unfavorable aspect observed is its capacity to damp vibrations which is smaller than the gray cast iron. This aspect shall be considered in the project of automotive components as vibration causes noise problems that shall be avoided.
  • the nodular cast iron group due to its high tensile strength (450 to 900 Mega Pascal) and to good elongation values (20 to 2%), has been used in several automotive and machine components.
  • its use in engine blocks and heads has been restricted to a few cases mainly due to the presence of solidification porosities and machinability much lower than the gray cast iron and the vermicular cast iron, and its low capacity to damp vibrations and low heat conductivity.
  • One of the goals of the present invention is to provide a graphitic cast iron of high tensile strength that presents an ultimate tensile strength up to 600 Mega Pascal, and an yield strength up to 380 Mega Pascal.
  • a graphitic cast iron of high tensile strength that presents a microstructure with adequate proportions of nodular graphite (forms I and II as per Standard ASTM A247) and adequate proportions of vermicular graphite (form IV as per Standard ASTM A247) ; the percentage of nodular graphite comprised in the range of 20- 40% and the percentage of vermicular graphite comprised in the range of 60-80% so that the total amount of graphite be 12-15% in volume, being the matrix a pearlitic one, and such microstructure of metallic matrix is comprised of refined pearlite.
  • the graphitic cast iron of high tensile strength thus, presents a content of Carbon from 3,5 to 3,9%, a content of Si from 2,0 to 2,6%, a content of Cr lower than 0,05%, a content of Mn lower than 0,40% and a content of Ti lower than 0,015 %; controlled additions of Cu, Sn, Ni and Mo are foreseen according to the thickness of the part.
  • this microstructure provided to the graphitic cast iron of high tensile strength, it is possible to counterbalance the contraction of surface solidification, thus, producing parts free from solidification porosities. At the same time, this microstructure presents good machinability due to the lubricant effect the graphite exerts on the cutting tool.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
PCT/BR2002/000165 2001-11-27 2002-11-26 Graphitic cast iron of high mechanical strength WO2003045626A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02782550A EP1458518A4 (de) 2001-11-27 2002-11-26 Graphitgusseisen hoher mechanischer festigkeit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0105989-0 2001-11-27
BR0105989A BR0105989B1 (pt) 2001-11-27 2001-11-27 ferro fundido grafìtico de alta resistência mecánica.

Publications (2)

Publication Number Publication Date
WO2003045626A2 true WO2003045626A2 (en) 2003-06-05
WO2003045626A3 WO2003045626A3 (en) 2004-03-18

Family

ID=3948160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2002/000165 WO2003045626A2 (en) 2001-11-27 2002-11-26 Graphitic cast iron of high mechanical strength

Country Status (3)

Country Link
EP (1) EP1458518A4 (de)
BR (1) BR0105989B1 (de)
WO (1) WO2003045626A2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109923232A (zh) * 2016-09-29 2019-06-21 图彼股份公司 用于内燃机机体和缸头的蠕墨铸铁合金
CN109937264A (zh) * 2016-09-13 2019-06-25 图彼股份公司 蠕墨铸铁合金和内燃机缸头
CN111676416A (zh) * 2020-06-23 2020-09-18 飞龙汽车部件股份有限公司 一种奥氏体蠕墨铸铁材料

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5858127A (en) * 1996-08-02 1999-01-12 Gunite Corporation Metal alloys and brake drums made from such alloys
WO2001038593A1 (en) * 1999-11-23 2001-05-31 Sintercast Ab New cast iron alloy and method for making the same

Family Cites Families (14)

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GB1449052A (en) * 1973-02-20 1976-09-08 British Steel Corp Ingot moulds
SE7711918L (sv) * 1977-10-24 1979-04-25 Sandvik Ab For stalverkskokiller avsett gjutjern
ATE14455T1 (de) * 1980-01-15 1985-08-15 Materials & Methods Ltd Verfahren zur herstellung von gusseisen mit vermicular-graphit und nach diesem verfahren hergestelltes gusseisen.
DE3010623C2 (de) * 1980-03-20 1982-12-02 Metallgesellschaft Ag, 6000 Frankfurt Vorrichtung zum Behandlung von geschmolzenem Gußeisen
FR2487853B1 (fr) * 1980-07-31 1986-05-09 Citroen Sa Procede d'elaboration de fonte a graphite compact-vermiculaire, et fonte ainsi obtenue
CH661476A5 (de) * 1982-07-31 1987-07-31 Kubota Ltd Verbundzylinderlaufbuechse fuer verbrennungsmotoren.
US4501612A (en) * 1983-10-27 1985-02-26 The University Of Alabama Compacted graphite cast irons in the iron-carbon-aluminum system
JPS61189833A (ja) * 1985-02-19 1986-08-23 Kobe Chutetsusho:Kk プレス金型
CN85107725B (zh) * 1985-10-17 1987-12-23 陕西机械学院 制造玻璃瓶模具的蠕墨铸铁
US4830656A (en) * 1986-04-17 1989-05-16 Anciens Etablissements Caffier & Barreau Cast iron molds for glass making and method of making
DE3824175A1 (de) * 1988-07-16 1990-01-18 Metallgesellschaft Ag Verfahren zur herstellung von gusseisen mit kugelgraphit und/oder vermiculargraphit
JP2624886B2 (ja) * 1990-09-19 1997-06-25 株式会社日立製作所 エレベータ装置
DE19654893C2 (de) * 1996-07-25 1999-06-10 Federal Mogul Burscheid Gmbh Kolbenringe von Verbrennungskraftmaschinen aus einer Gußeisenlegierung
SE520028C2 (sv) * 1998-07-03 2003-05-13 Sintercast Ab Förfarande för framställning av kompaktgrafitjärnalster, detta alster, samt användning av kompaktgrafitjärnlegering

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5858127A (en) * 1996-08-02 1999-01-12 Gunite Corporation Metal alloys and brake drums made from such alloys
WO2001038593A1 (en) * 1999-11-23 2001-05-31 Sintercast Ab New cast iron alloy and method for making the same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE HCAPLUS [Online] XP002964977 Database accession no. 1987:559208 & CN 85 107 725 A *
FULLER A.G. ET AL.: 'A report on the effect upon mechanical properties of variation in graphite from in irons having varying amounts of ferrite and pearlite in the matrix structure and the use of nondestructive tests in the assessment of mechanical properties of such irons' TRANSACTIONS OF THE AMERICAN FOUNDRYMEN'S SOCIETY vol. 88, 1980, pages 21 - 50, XP002981621 *
See also references of EP1458518A2 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109937264A (zh) * 2016-09-13 2019-06-25 图彼股份公司 蠕墨铸铁合金和内燃机缸头
CN109937264B (zh) * 2016-09-13 2021-11-26 图彼股份公司 蠕墨铸铁合金和内燃机缸头
CN109923232A (zh) * 2016-09-29 2019-06-21 图彼股份公司 用于内燃机机体和缸头的蠕墨铸铁合金
JP2019536891A (ja) * 2016-09-29 2019-12-19 テュピー・エシ・アー 内燃エンジンブロック及びヘッドのためのバーミキュラ鋳鉄合金
CN111676416A (zh) * 2020-06-23 2020-09-18 飞龙汽车部件股份有限公司 一种奥氏体蠕墨铸铁材料

Also Published As

Publication number Publication date
BR0105989B1 (pt) 2009-08-11
WO2003045626A3 (en) 2004-03-18
EP1458518A2 (de) 2004-09-22
EP1458518A4 (de) 2004-12-15
BR0105989A (pt) 2002-11-12

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