| 摘要 |
PROBLEM TO BE SOLVED: To provide a stock which has satisfactory workability and also has excellent piercing strength as the one for a laminate type lithium ion secondary battery case. SOLUTION: The ferritic stainless steel foil for a lithium ion secondary battery case has a composition containing, by mass,≤0.02% C,≤3% Si,≤2% Mn,≤0.04% P,≤0.003% S,≤2% Ni,≤2% Cu, 10 to 30% Cr,≤2% Mo,≤0.025% N,≤0.3% Al,≤0.01% B and either or both of Nb and Ti by≤0.5% in total, and satisfying (0.5Nb+Ti)/(C+N)≥5, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2011,JPO&INPIT
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