EP 2749658 A1 20140702 - Method for as-cast production of ausferritic ductile iron
Title (en)
Method for as-cast production of ausferritic ductile iron
Title (de)
Verfahren zur Herstellung von ausferritischem Gusseisen mit Kugelgraphit
Title (fr)
Procédé de production de coulée de fonte ductile ausferritique
Publication
Application
Priority
EP 12382541 A 20121227
Abstract (en)
The present invention discloses a method for the manufacturing of ausferritic ductile iron alloy which comprises the following steps: (i) casting a melt of a ductile iron alloy in a mould; (ii) solidification of the casting in the mould and subsequent cooling until the casting temperature is between 800ºC and 950ºC; (iii) shaking out the casting at said temperature between 800ºC and 950ºC; (iv) cooling the casting until the temperature of the casting reaches a value between 275ºC to 450ºC with a high enough cooling rate in order to avoid the pearlitic nose; (v) introducing the casting in an insulating material and leaving the casting inside for a period of time until a completely ausferritic microstructure is obtained. The invention also discloses the ausferritic ductile iron alloy produced by the present method.
IPC 8 full level
C21D 5/00 (2006.01); C21D 1/20 (2006.01); C21D 1/68 (2006.01); C21D 1/70 (2006.01); C22C 37/04 (2006.01)
CPC (source: EP)
C21D 1/20 (2013.01); C21D 1/68 (2013.01); C21D 1/70 (2013.01); C21D 5/00 (2013.01); C22C 37/04 (2013.01)
Citation (applicant)
- NT.J.CAST METALS RES., vol. 11, 1999, pages 483 - 488
- ALI REZA KIANI-RASHID ET AL., INTERNATIONAL FOUNDRY RESEARCH, vol. 63, no. 1, 2011
Citation (search report)
- [X] US 5139579 A 19920818 - KOVACS BELA V [US], et al
- [A] US 4504527 A 19850312 - HARA SADAO [JP], et al
- [A] US 5753055 A 19980519 - LIU XIAOJUN [US]
- [A] US 2004071584 A1 20040415 - MOLINARI ALBERTO [IT], et al
- [A] US 5878897 A 19990309 - LAZZARO FRANK [US], et al
- [X] JANOWAK J F ET AL: "APPROACHING AUSTEMPERED DUCTILE IRON PROPERTIES BY CONTROLLED COOLING IN THE FOUNDRY", INTERNATIONAL CONFERENCE ON AUSTEMPERED DUCTILE IRON, XX, XX, 2 April 1984 (1984-04-02), pages 63 - 69, XP001182603
- [A] "Austempered ductile-iron castings - advantages, production, properties and specifications", MATERIALS AND DESIGN, LONDON, GB, vol. 13, no. 5, 1 January 1992 (1992-01-01), pages 285 - 297, XP024153210, ISSN: 0261-3069, [retrieved on 19920101], DOI: 10.1016/0261-3069(92)90191-J
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 12382541 A 20121227