Surface-treated steel sheet and battery container

Abstract

Provided is a surface-treated steel sheet provided with a steel sheet and an Fe-Ni diffusion layer formed on the outermost surface of at least one surface of the steel sheet, the ratio IB / IA of the maximum diffraction intensity IB at a diffraction angle 2 [theta] of 44.51 DEG to 45.00 DEG inclusive to the maximum diffraction intensity IA at a diffraction angle 2 [theta] of 43.00 DEG to 44.30 DEG inclusive, as determined by thin film X-ray diffraction measurement on the surface of the Fe-Ni diffusion layer, is 0.01 < = IB / IA < = 0.37.

Claims

1. A surface-treated steel sheet, comprising: a steel sheet, and an Fe-Ni diffusion layer formed on the outermost surface of at least one surface of the steel sheet, The maximum diffraction intensity I at a diffraction angle 2θ of 44.51° or more and 45.00° or less, obtained by thin film X-ray diffraction measurement of the surface of the Fe-Ni diffusion layer B and the maximum diffraction intensity I at a diffraction angle 2θ of 43.00° or more and 44.30° or less A The ratio I B / I A is 0.01 ≤ I B / I A ≤ 0.

37.

2. The surface-treated steel sheet according to claim 1, wherein, The maximum diffraction intensity I at diffraction angles 2θ of 43.00° or more and 44.30° or less obtained by thin film X-ray diffraction measurement of the surface of the Fe-Ni diffusion layer A has a half-value width B of 0.35 or more.

3. The surface-treated steel sheet according to claim 1 or 2, wherein, wherein the thickness of the Fe-Ni diffusion layer is 0.5 to 4 μm.

4. The surface-treated steel sheet according to any one of claims 1 to 3, wherein, The adhesion amount of Ni to the steel plate is 1.78 - 8.9 g / m 2 .

5. The surface-treated steel sheet according to any one of claims 1 to 4, wherein, The thickness of the steel sheet is 0.03 to 0.9 mm.

6. A battery container, which is formed by shaping the surface-treated steel sheet according to any one of claims 1 to 5 such that the surface on which the Fe-Ni diffusion layer is formed on the outermost surface becomes the inner side of the battery container.

Images