WO2003045626A2 - Graphitic cast iron of high mechanical strength - Google Patents
Graphitic cast iron of high mechanical strength Download PDFInfo
- 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
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)
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)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
2001
- 2001-11-27 BR BR0105989A patent/BR0105989B1/pt not_active IP Right Cessation
-
2002
- 2002-11-26 EP EP02782550A patent/EP1458518A4/de not_active Withdrawn
- 2002-11-26 WO PCT/BR2002/000165 patent/WO2003045626A2/en not_active Application Discontinuation
Patent Citations (2)
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)
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)
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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