AUSTENITIC STAINLESS STEEL FOIL

• US 20180237882A1
• Filed: 08/17/2016
• Published: 08/23/2018
• Est. Priority Date: 08/17/2015
• Status: Active Grant

• Current Assignee: NIPPON STEEL Chemical & Material Co., Ltd. (Nippon Steel Corporation)
• Original Assignee: Nippon Steel & Sumikin Materials Co., Ltd. (Nippon Steel Corporation)
• Inventors: UNNO, Hiroto, SAWAKI, Naoya, FUJIMOTO, Naoki, FUKUDA, Masahiro, UNO, Tomohiro, INAGUMA, Toru
• Granted Patent: US 10,323,294 B2
• Time in Patent Office: Days
• CPC Class Codes: B21B 1/22 for rolling plates, strips, bands or sheets of indefinite length B21B1/42 takes precedence
• CPC Class Codes: B21B 1/38 for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rollingB21B1/40 takes precedence; folding sheets before, or separating layers after, rolling B21B47/00
• CPC Class Codes: B21B 1/40 for rolling foils which present special problems, e.g. because of thinness
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 15/088 comprising polyamides
• CPC Class Codes: B32B 15/09 comprising polyesters
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2307/704 Crystalline
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2457/10 Batteries
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C21D 1/74 : Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
• CPC Class Codes: C21D 1/76 : Adjusting the composition of the atmosphere
• CPC Class Codes: C21D 2201/05 : Grain orientation
• CPC Class Codes: C21D 2211/001 : Austenite
• CPC Class Codes: C21D 6/004 : containing Cr and Ni
• CPC Class Codes: C21D 6/005 : containing Mn
• CPC Class Codes: C21D 6/008 : containing Si
• CPC Class Codes: C21D 8/0205 : of ferrous alloys
• CPC Class Codes: C21D 8/0236 : Cold rolling
• CPC Class Codes: C21D 8/0268 : between cold rolling steps
• CPC Class Codes: C21D 8/0273 : Final recrystallisation annealing
• CPC Class Codes: C21D 8/0405 : of ferrous alloys
• CPC Class Codes: C21D 8/0436 : Cold rolling
• CPC Class Codes: C21D 8/0447 : characterised by the heat treatment
• CPC Class Codes: C21D 8/0468 : between cold rolling steps
• CPC Class Codes: C21D 9/46 : for sheet metals
• CPC Class Codes: C21D 9/48 : deep-drawing sheets
• CPC Class Codes: C22C 38/00 : Ferrous alloys, e.g. steel alloys cast-iron alloys C22C37/00
• CPC Class Codes: C22C 38/001 : containing N
• CPC Class Codes: C22C 38/002 : containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
• CPC Class Codes: C22C 38/02 : containing silicon
• CPC Class Codes: C22C 38/04 : containing manganese
• CPC Class Codes: C22C 38/40 : with nickel
• CPC Class Codes: C22C 38/42 : with copper
• CPC Class Codes: C22C 38/44 : with molybdenum or tungsten
• CPC Class Codes: C22C 38/58 : with more than 1.5% by weight of manganese
• CPC Class Codes: H01M 10/052 : Li-accumulators
• CPC Class Codes: H01M 50/119 : Metals
• CPC Class Codes: H01M 50/121 : Organic material
• CPC Class Codes: H01M 50/124 : having a layered structure
• CPC Class Codes: H01M 50/133 : Thickness
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y10T 428/12569 : Synthetic resin
• CPC Class Codes: Y10T 428/12951 : Fe-base component
• CPC Class Codes: Y10T 428/12972 : Containing 0.01-1.7% carbon [i.e., steel]
• CPC Class Codes: Y10T 428/12993 : Surface feature [e.g., rough, mirror]
• CPC Class Codes: Y10T 428/2495 : Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/26 : Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/264 : Up to 3 mils
• CPC Class Codes: Y10T 428/265 : 1 mil or less

Abstract

Provided is an austenitic stainless steel foil that demonstrates a high degree of stretch formability and little deformation anisotropy with respect to stretch forming despite having a sheet thickness of 60 μm or less. The austenitic stainless steel foil of the present invention has a sheet thickness of 5 μm to 60 μm, a recrystallization rate of 90% to 100%, and a texture in which the total of the area ratio of a crystal orientation in which the difference in orientation from the {112}<111> orientation is within 10°, the area ratio of a crystal orientation in which the difference in orientation from the {110}<112> orientation is within 10°, and the area ratio of a crystal orientation in which the difference in orientation from the {110}<001> orientation is within 10°, in a measuring field thereof, is 20% or less.

Claims

1. An austenitic stainless steel foil having a sheet thickness of 5 μ

m to 60 μ

m, comprising;

a recrystallization rate of 90% to 100%, and

an texture in which a total of an area ratio of a crystal orientation in which a difference in orientation from a {112}<

111>

orientation is within 10°

, an area ratio of a crystal orientation in which a difference in orientation from a {110}<

112>

orientation is within 10°

, and an area ratio of a crystal orientation in which a difference in orientation from a {110}<

001>

orientation is within 10°

, in a measuring field of the stainless steel foil, is 20% or less.

2. The austenitic stainless steel foil according to claim 1, wherein the sheet thickness is 5 μ

m to 25 μ

m.

3. The austenitic stainless steel foil according to claim 1, wherein the number of crystal grains in the direction of sheet thickness is 3 or more.

4. The austenitic stainless steel foil according to claim 1, wherein the nitrogen concentration of the surface layer is 1.0% by mass or less.

5. The austenitic stainless steel foil according to claim 1, wherein a resin film is laminated on at least one surface of the austenitic stainless steel foil.

6. The austenitic stainless steel foil according to claim 2, wherein the number of crystal grains in the direction of sheet thickness is 3 or more.

7. The austenitic stainless steel foil according to claim 2, wherein the nitrogen concentration of the surface layer is 1.0% by mass or less.

8. The austenitic stainless steel foil according to claim 3, wherein the nitrogen concentration of the surface layer is 1.0% by mass or less.

9. The austenitic stainless steel foil according to claim 2, wherein a resin film is laminated on at least one surface of the austenitic stainless steel foil.

10. The austenitic stainless steel foil according to claim 3, wherein a resin film is laminated on at least one surface of the austenitic stainless steel foil.

11. The austenitic stainless steel foil according to claim 4, wherein a resin film is laminated on at least one surface of the austenitic stainless steel foil.