EP 0627494 B1 19970723 - Alloy sheet for shadow mask and method for manufacturing thereof
Title (en)
Alloy sheet for shadow mask and method for manufacturing thereof
Title (de)
Legierung für Schattenmaske und Verfahren zu dessen Herstellung
Title (fr)
Alliage pour masque d'ombre et sa méthode de fabrication
Publication
Application
Priority
- JP 15288593 A 19930531
- JP 18493893 A 19930727
Abstract (en)
[origin: EP0627494A1] An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt.% Ni, 0.07 wt.% or less Si, 0.002 wt.% or less B, 0.002 wt.% or less O, less than 0.002 wt.% N and the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2 % proof stress of 28 kgf/mm<2> or less; and a gathering degree of {211} plane being 16 % or less. A method for manufacturing an alloy sheet comprises: a finish cold-rolling step of cold-rolling the cold-rolled sheet at a cold-rolling reduction ratio in response to an average austenite grain size D ( mu m), the reduction ratio of final cold-rolling R (%) satisfying the equations below; 16 </= R</=75, 6.38D-133.9 </= R </= 6.38D-51.0 a softening annealing step of annealing said cold rolled sheet in a temperature range of 720 to 790 DEG C for 2 to 40 min. before press-forming and on conditions satisfying the equation below; T >/= -53.8 logt + 806, where T( DEG C) is the temperature and t (min.) is the time of the annealing. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/08 (2006.01); H01J 9/14 (2006.01)
CPC (source: EP)
C21D 8/0205 (2013.01); C22C 38/08 (2013.01); H01J 9/142 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 8/0268 (2013.01); C21D 8/0273 (2013.01); H01J 2229/0733 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0627494 A1 19941207; EP 0627494 B1 19970723; CN 1037984 C 19980408; CN 1100758 A 19950329; DE 69312477 D1 19970828; DE 69312477 T2 19980102; DE 69319153 D1 19980716; DE 69319153 T2 19981112; EP 0739992 A1 19961030; EP 0739992 B1 19980610; KR 970003640 B1 19970320
DOCDB simple family (application)
EP 93120232 A 19931215; CN 94103317 A 19940318; DE 69312477 T 19931215; DE 69319153 T 19931215; EP 96101338 A 19931215; KR 19940005990 A 19940324