EP 1838888 A2 20071003 - DUCTILE IRON AND METHOD FOR MANUFACTURING DUCTILE IRON FOR ENGINEERING COMPONENTS REQUIRING STRENGTH AND TOUGHNESS
Title (en)
DUCTILE IRON AND METHOD FOR MANUFACTURING DUCTILE IRON FOR ENGINEERING COMPONENTS REQUIRING STRENGTH AND TOUGHNESS
Title (de)
DUKTILES EISEN UND VERFAHREN ZUR HERSTELLUNG VON DUKTILEM EISEN FÜR TECHNISCHE KOMPONENTEN, DIE FESTIGKEIT UND ZÄHIGKEIT VERLANGEN
Title (fr)
FONTE DUCTILE ET PROCEDE DE FABRICATION ASSOCIE POUR L'ELABORATION DE COMPOSANTS A PROPRIETES DE RESISTANCE ET DE TENACITE DESIREES
Publication
Application
Priority
- FI 2006050002 W 20060102
- FI 20055010 A 20050105
Abstract (en)
[origin: WO2006072663A2] The invention relates to ductile iron for engineering components requiring strength and toughness. This ductile iron is fine grain ductile iron. Fine grain ductile iron (FGDI) comprises as weight percentages: C 3.6-2.8, Si 1.3-2.6, Mg 0.065-0.025, Mn 0.8-0.1 and Cu 0.1-1.6, Ni 0.2-2.0, P 0.03-0.005 and S 0.003-0.01. The graphite sphere density of fine grain ductile iron (FGDI) is 150-400 spheres/mm2. The object of the invention is also a method for manufacturing ductile iron for engineering components requiring strength and toughness. In the method, raw materials are melted with induction melting (21), in the melt-treatment phases, the melt is spheroidised (22), inoculated (23) and cast (24), and after the shake-out phase of castings (25), the secondary operations of castings are performed (26). For manufacturing fine grain ductile iron (FGDI), the pieces are heat-treated in a URVA 850 heat treatment (28).
IPC 8 full level
C22C 33/08 (2006.01); C22C 33/10 (2006.01); C22C 37/04 (2006.01); C22C 37/10 (2006.01)
IPC 8 main group level
C21D (2006.01)
CPC (source: EP FI)
C21C 1/10 (2013.01 - FI); C22C 33/08 (2013.01 - EP); C22C 33/10 (2013.01 - EP); C22C 37/04 (2013.01 - EP FI); C22C 37/10 (2013.01 - EP)
Citation (search report)
See references of WO 2006072663A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
WO 2006072663 A2 20060713; WO 2006072663 A3 20070518; EP 1838888 A2 20071003; FI 118738 B 20080229; FI 20055010 A0 20050105; FI 20055010 A 20060706
DOCDB simple family (application)
FI 2006050002 W 20060102; EP 06700056 A 20060102; FI 20055010 A 20050105