EP 0239838 B1 19910227 - APPLICATION OF A FAST QUENCHED ALLOY TO AN IRON-CHROME-COBALT BASE
Title (en)
APPLICATION OF A FAST QUENCHED ALLOY TO AN IRON-CHROME-COBALT BASE
Publication
Application
Priority
DE 3611342 A 19860404
Abstract (en)
[origin: EP0239838A1] Ductile strips of magnetically hard or semihard alloys of the iron/chromium/cobalt type are required, in particular, for producing picture tube shadow masks. According to the invention alloys consisting of 10 to 45% chromium, 3 to 35% cobalt, the remainder essentially being iron and quenched at a cooling rate of about 10<3> to 10<6> K/s are proposed for this purpose. These have a microcrystalline structure free of gamma-phase and/or sigma-phase precipitates. Preferably, the structure has a mean grain diameter of 1 to 50 mu m.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 30/00 (2006.01); C22C 38/30 (2006.01); C22F 1/11 (2006.01); H01F 1/03 (2006.01); H01F 1/04 (2006.01); H01J 29/07 (2006.01)
CPC (source: EP)
C22C 30/00 (2013.01); H01F 1/0306 (2013.01); H01J 29/07 (2013.01); H01J 2229/0733 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0239838 A1 19871007; EP 0239838 B1 19910227; DE 3611342 A1 19871008; DE 3768113 D1 19910404; JP S6324047 A 19880201
DOCDB simple family (application)
EP 87103341 A 19870309; DE 3611342 A 19860404; DE 3768113 T 19870309; JP 7132587 A 19870324