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1. 发明公开

EP0739992A1 Alloy sheet for shadow mask and method for manufacturing thereof 失效
标题翻译： LegistungfürSchattenmaske und Verfahren zu dessen Herstellung
公开(公告)号：EP0739992A1
公开(公告)日：1996-10-30
申请号：EP96101338.0
申请日：1993-12-15
申请人： NKK CORPORATION
发明人： Inoue, Tadashi , Tsuru, Kiyoshi , Hiasa, Michihito
IPC分类号： C22C38/08 , C21D8/02
CPC分类号： H01J9/142 , C21D8/0205 , C21D8/0236 , C21D8/0263 , C21D8/0268 , C21D8/0273 , C22C38/08 , H01J2229/0733
摘要： An alloy sheet for making a shadow mask consisting essentially of 34 to 38 wt.% Ni, 0.1 wt.% or less Si, 0.003 wt.% or less B, 0.003 wt.% or less O, less than 0.002 wt.% N, 0.05 to 3 wt.% Cr and the balance being Fe and inevitable impurities;
said alloy sheet after annealing before press-forming having 0.2% proof stress of 27.5 kgf/mm 2 or less; and
a gathering degree of {211} plane on a surface of said alloy sheet being 16% or less.
A method for manufacturing an alloy sheet for shadow mask comprising the steps of:

(a) preparing a hot-rolled sheet containing Fe, Ni and Cr;
(b) annealing said hot-rolled sheet in a temperature range of 910 to 990°C;
(c) cold-rolling said annealed hot-rolled sheet to produce a cold-rolled sheet:
(d) a final recrystallization annealing step of annealing said cold-rolled sheet subjected to the cold-rolling;
(e) a finish cold-rolling step of cold-rolling the cold-rolled sheet subjected to the final recrystallization annealing at the cold-rolling reduction ratio in response to an average austenite grain size D (µm) yieleded by the final recrystallization annealing, the cold-rolling reduction ratio R (%) satisfying the equations below; 16 ≦ R≦75, 6.38D-133.9 ≦ R ≦ 6.38D-51.0
(f) a stress relief annealing step of annealing the cold-rolled sheet subjected to the finish cold rolling;
(g) a softening annealing step of annealing said cold-rolled sheet subjected to the finish cold-rolling in a temperature range of 700 to less than 800 °C for 0.5 to less than 60 min. before press-forming and on conditions satisfying the equation below; T ≧ -48.1 logt + 785, where T( °C) is the temperature and t (min.) is the time of the annealing.
摘要翻译：用于制造基本上由34至38重量％的Ni，0.1重量％或更少的Si，0.003重量％或更少的B，0.003重量％或更少的O，小于0.002重量％的N组成的荫罩的合金薄片，0.05〜3重量％的Cr，余量为Fe和不可避免的杂质; 所述合金板在压制成形之后的退火后具有27.5kgf / mm 2以下的0.2％的有限应力; 并且在所述合金板的表面上的聚集度为ä211ü平面为16％以下。一种荫罩用合金薄板的制造方法，其特征在于，包括：（a）制备含有Fe，Ni，Cr的热轧板; （b）在910〜990℃的温度范围内退火所述热轧板; （c）冷轧所述退火的热轧板以制造冷轧板;（d）对经过冷轧的冷轧板退火的最终再结晶退火步骤; （e）根据通过最终再结晶退火得到的平均奥氏体晶粒尺寸D（μm），以冷轧压下率冷轧经过最终再结晶退火的冷轧板的精轧冷轧工序，满足以下等式的冷轧压下率R（％）（f）对经过精冷轧的冷轧板退火的应力消除退火工序; （g）软化退火工序，在700〜800℃的温度范围内对经过精冷轧的冷轧板进行0.5〜60分钟的退火。在压制成形之前和满足以下等式的条件下进行。其中T（℃）为温度，t（min。）为退火时间。

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