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    • 81. 发明申请
    • STAINLESS STEEL FOIL AND METHOD OF PRODUCTION OF SAME
    • 不锈钢箔及其生产方法
    • US20170009312A1
    • 2017-01-12
    • US15119194
    • 2015-02-16
    • NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.
    • Hiroto UNNOShinichi TERASHIMAToru INAGUMAKoichi NOSENaoki FUJIMOTONaoya SAWAKIShuji NAGASAKI
    • C21D9/00C21D1/74C21D8/00B32B15/18H01M2/02
    • C21D9/0068B32B15/18B32B2457/10C21D1/74C21D6/002C21D8/005C21D8/0236C21D8/0257C21D8/0273C21D9/46C21D2211/001C21D2211/005C22C38/40H01M2/0285
    • The present invention has as its object to provide thickness 60 μm or less ultra-thin stainless steel foil which secures high thickness precision and simultaneously secures plastic deformability and good elongation at break, that is, secures good press-formability (deep drawability). The present invention solves this problem by ultra-thin stainless steel foil which has three or more crystal grains in a thickness direction, has a recrystallization rate of 90% to 100%, and has a nitrogen concentration of a surface layer of 1.0 mass % or less. For this reason, there is provided a method of production of stainless steel foil comprising rolling stainless steel sheet, then performing final annealing and making a thickness 5 μm to 60 μm, wherein a rolling reduction ratio at rolling right before final annealing is 30% or more, a temperature of final annealing after rolling is 950° C. to 1050° C. in the case of austenitic stainless steel and 850° C. to 950° C. in the case of ferritic stainless steel, and a nitrogen content in atmospheric gas in final annealing is 0.1 vol % or less, whereby ultra-thin stainless steel foil can be produced.
    • 本发明的目的是提供厚度为60μm或更小的超薄不锈钢箔,其确保了高厚度精度并同时确保了塑性变形性和良好的断裂伸长率,即确保了良好的冲压成形性(深冲性)。 本发明通过在厚度方向上具有三个或更多个晶粒的超薄不锈钢箔来解决这个问题,其重结晶率为90%至100%,表层的氮浓度为1.0质量%,或 减。 因此,提供了一种生产不锈钢箔的方法,其包括轧制不锈钢板,然后进行最终退火并制成厚度为5μm至60μm,其中在最终退火之前轧制右侧的轧制压下率为30%或 在奥氏体不锈钢的情况下,在铁素体不锈钢的情况下,轧制后的最终退火温度为950℃至1050℃,在铁素体不锈钢的情况下为850℃至950℃,大气中的氮含量 最终退火中的气体为0.1体积%以下,由此可以制造超薄不锈钢箔。