EP 0076701 B1 19860514 - HEAT-RESISTANT SPHEROIDAL GRAPHITE CAST IRON
Title (en)
HEAT-RESISTANT SPHEROIDAL GRAPHITE CAST IRON
Publication
Application
Priority
JP 15754281 A 19811005
Abstract (en)
[origin: EP0076701A2] A heat-resistant spheroidal graphite cast iron consists essentially of not more than 3.4 wt% of C, 3.5 to 5.5 of Si, not more than 0.6 wt% of Mn, 0.1 to 0.7 wt% of Cr, 0.3 to 0.9 wt% of Mo, not more than 0.1 wt% of a spheroidizing agent and the balance of Fe. Compared to conventional high silicon spheroidal graphite cast irons, this cast iron distinctly higher in the resistance to oxidation at high temperatures and is higher in strength too. This cast iron is far lower in production cost than conventional high nickel spheroidal graphite cast irons which are high in the resistance to oxidation at high temperatures. Preferably the cast iron contains at least 1.7 wt% of C and from 0.25 to 0.7 wt% of Cr. Suitable spherodizing agents are Mg, Ca and Ce. The cast iron may be made by a conventional process by allowing a molten metal of an appropriate composition and containing a spheroidizing agent to solidify in a mould and then subjecting the solidified casts to a spheroidizing-ferritizing heat treatment.
IPC 1-7
IPC 8 full level
C22C 37/04 (2006.01); C22C 37/10 (2006.01); F01D 25/24 (2006.01)
CPC (source: EP)
C22C 37/04 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0076701 A2 19830413; EP 0076701 A3 19831026; EP 0076701 B1 19860514; DE 3271179 D1 19860619; JP S5858248 A 19830406; JP S6053736 B2 19851127
DOCDB simple family (application)
EP 82305306 A 19821005; DE 3271179 T 19821005; JP 15754281 A 19811005