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EP1448339A2 - Fonte vermiculaire presentant une bonne usinabilite et exempte de microporosites - Google Patents

Fonte vermiculaire presentant une bonne usinabilite et exempte de microporosites

Info

Publication number
EP1448339A2
EP1448339A2 EP02782548A EP02782548A EP1448339A2 EP 1448339 A2 EP1448339 A2 EP 1448339A2 EP 02782548 A EP02782548 A EP 02782548A EP 02782548 A EP02782548 A EP 02782548A EP 1448339 A2 EP1448339 A2 EP 1448339A2
Authority
EP
European Patent Office
Prior art keywords
cast iron
vermicular cast
free
microporosities
presenting
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.)
Withdrawn
Application number
EP02782548A
Other languages
German (de)
English (en)
Other versions
EP1448339A4 (fr
Inventor
Wilson Luiz Guesser
Eitan Rua Albano Schmidt Nr. 1.499 MELLERAS
Isaias Masiero
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.)
Tupy Fundicoes Ltda
Original Assignee
Tupy Fundicoes 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 Fundicoes Ltda filed Critical Tupy Fundicoes Ltda
Publication of EP1448339A2 publication Critical patent/EP1448339A2/fr
Publication of EP1448339A4 publication Critical patent/EP1448339A4/fr
Withdrawn legal-status Critical Current

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
    • C22C37/04—Cast-iron alloys containing spheroidal graphite
    • 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

Definitions

  • the present report is about a vermicular cast iron, of high machinability and free from microporosity. More specifically, a vermicular cast iron of high machinability and free from microporosities that comprises classes between 350 and 500 MEGA PASCAL of ultimate tensile strength.
  • the vermicular cast iron represents a group of Fe-C-Si alloys, with Mn, P, S, and controlled additions of Mg, presenting graphite predominately in vermicular form (form IV according to Standard ASTM A247), with up to 20% of nodules (forms I and II as per Standard ASTM A247) in its microstructure.
  • the addition of complementary pearlitic elements, such as Mn, Cr, Cu and Sn allow one to obtain the desired class, which can vary between 350 and 500 Mega Pascal of ultimate tensile strength.
  • additions of Ti are also carried out to increase the resistance to wear out and to improve the lubrication of the cylinder in engine blocks.
  • Vermicular cast iron has been increasingly applied in automotive components such as internal combustion engine blocks, internal combustion engine heads, disks and brake drums. In general, its application involves the substitution of gray cast iron to increase tensile strength.
  • One of the goals of the present invention is to provide vermicular cast iron of high machinability, free from microporosities that allows the increase in the life of tools to be used with the cast part together with the innovated characteristics.
  • vermicular cast iron of high machinability, free form microporosities that presents a bigger amount of graphite per volume of vermicular cast iron; this increase being the amount of graphite obtained by the addition of nodules in the microstructure so that the percentage of those nodules be also increased in relation to the volume in the conventional vermicular cast iron.
  • the present invention proposes a vermicular cast iron of high machinability and free from microporosities that presents an amount of graphite between 12-15% in volume of vermicular cast iron; the increase in the amount of graphite is obtained with the addition of nodules to the microstructure, resulting in an amount between 20-40% in the volume of vermicular cast iron.
  • the machinability is improved, if compared to the conventional vermicular iron, with the limitation of elements that form carbide or carbonitrides
  • vermicular cast iron of high machinability and free from microporosities has a content of carbon between 3,6 and 3,9%, a content of Si between 2,0 and

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)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne une fonte vermiculaire présentant une bonne usinabilité et exempte de microporosités, qui présente des classes de résistance à la traction allant de 350 à 500 mégapascals, et qui comprend une proportion accrue de graphite par rapport au volume de fonte vermiculaire. Cette proportion accrue de graphite est obtenue sous forme de nodules additionnels dans la microstructure, de sorte que le pourcentage de ces nodules est également augmenté par rapport au volume de fonte vermiculaire.
EP02782548A 2001-11-27 2002-11-26 Fonte vermiculaire presentant une bonne usinabilite et exempte de microporosites Withdrawn EP1448339A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BR0105988A BR0105988B1 (pt) 2001-11-27 2001-11-27 ferro fundido vermicular de alta usinabilidade e isento de microporosidades.
BR0105988 2001-11-27
PCT/BR2002/000163 WO2003045624A2 (fr) 2001-11-27 2002-11-26 Fonte vermiculaire presentant une bonne usinabilite et exempte de microporosites

Publications (2)

Publication Number Publication Date
EP1448339A2 true EP1448339A2 (fr) 2004-08-25
EP1448339A4 EP1448339A4 (fr) 2005-02-23

Family

ID=3948159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02782548A Withdrawn EP1448339A4 (fr) 2001-11-27 2002-11-26 Fonte vermiculaire presentant une bonne usinabilite et exempte de microporosites

Country Status (3)

Country Link
EP (1) EP1448339A4 (fr)
BR (1) BR0105988B1 (fr)
WO (1) WO2003045624A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104480377B (zh) * 2014-12-15 2017-05-17 山东省源通机械股份有限公司 高蠕化率蠕墨铸铁单缸柴油机机体及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069058A (en) * 1965-05-04 1967-05-17 Int Nickel Ltd Cast iron
US4409028A (en) * 1979-10-24 1983-10-11 Moore William H Process for producing cast iron
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
EP0769615A1 (fr) * 1995-10-17 1997-04-23 Ford Motor Company Limited Bloc à cylindres d'un moteur
US5858127A (en) * 1996-08-02 1999-01-12 Gunite Corporation Metal alloys and brake drums made from such alloys
SE9904257D0 (sv) * 1999-11-23 1999-11-23 Sintercast Ab New cast iron alloy

Also Published As

Publication number Publication date
WO2003045624A2 (fr) 2003-06-05
BR0105988A (pt) 2002-11-12
WO2003045624A3 (fr) 2004-03-18
BR0105988B1 (pt) 2009-08-11
EP1448339A4 (fr) 2005-02-23

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