| 摘要 |
<p>A thin Fe-Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt.%, Si of 0.05 wt.% or less, B of 0.0005 wt.% or less, O of 0.002 wt.% or less and N of 0.0015 % or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2 % proof stress of 28.5 kgf/mm<2> or less ; and a degree of {211} plane on a surface of said alloy sheet being 16 % or less. And further modified similar alloy sheets are also provided. Further, a method for producing a thin Fe-Ni alloy sheet for shadow mask comprises the steps of : (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910 to 990 DEG C; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip ; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D mu m) yieleded by the recrystallization annealing, the finish cold reducration ratio(R) being within a region enclosed by a range of R of 16 to 75 and a range of D of 6.38D-133.9 </= R </= 6.38D-51.0 and (f) annealing of the finish cold-rolled strip on conditions of a temperature of 720 to 790 DEG C, a time of 2 to 40 min. and T >/= -53.8 logt + 806, where T( DEG C) is the temperature of the annealing. And further modified similar methods are also provided. <IMAGE></p> |
