Stainless steel sheet and stainless steel foil

Patent metadata

Field	Value
Publication number	US-11008636-B2
Application number	US-201716342313-A
Country	US
Kind code	B2
Filing date	Oct 16, 2017
Priority date	Oct 17, 2016
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A stainless steel foil having a chemical composition comprising, by mass %, C: 0.015% or less, Si: 0.50% or less, Mn: 0.50% or less, P: 0.040% or less, S: 0.010% or less, Cr: 10.0% or more and less than 16.0%, Al: 2.5 to 4.5%, N: 0.015% or less, Ni: 0.05 to 0.50%, Cu: 0.01 to 0.10%, Mo: 0.01 to 0.15%, at least one selected from the group consisting of Ti: 0.01 to 0.30%, Zr: 0.01 to 0.20%, Hf: 0.01 to 0.20%, and REM: 0.01 to 0.20%, where Ti+Zr+Hf+2REM≥0.06 and 0.30≥Ti+Zr+Hf are satisfied.

First claim

The invention claimed is:

1. A stainless steel sheet having a chemical composition comprising, by mass %:
C: 0.015% or less;
Si: 0.50% or less;
Mn: 0.50% or less;
P: 0.040% or less;
S: 0.010% or less;
Cr: 10.0% to 14.0%;
Al: 2.5 to 4.5%;
N: 0.015% or less;
Ni: 0.05 to 0.50%;
Cu: 0.01 to 0.10%;
Mo: 0.01 to 0.15%;
at least one selected from the group consisting of Ti: 0.01 to 0.30%, Zr: 0.01 to 0.20%, Hf: 0.01 to 0.20%, and REM: 0.01 to 0.20%; and
the balance being iron and incidental impurities,
wherein the following Expression (1) and Expression (2) are satisfied:
Ti+Zr+Hf+2REM≥0.06  (1)

0.30≥Ti+Zr+Hf  (2)

where Ti, Zr, Hf, and REM each represent the content, by mass %, of each respective element and are zero if not contained.

2. The stainless steel sheet according to claim 1 , wherein the chemical composition further comprises, by mass %, at least one selected from the group consisting of Nb: 0.01 to 0.10%, V: 0.01 to 0.50%, B: 0.0003 to 0.0100%, Ca: 0.0002 to 0.0100%, and Mg: 0.0002 to 0.0100%.

3. A stainless steel foil comprising the steel sheet according to claim 1 , wherein the stainless steel foil has a thickness of 200 μm or less.

4. The stainless steel foil according to claim 3 , wherein the stainless steel foil is configured to be a catalyst carrier of an exhaust emission control device.

5. A stainless steel foil having comprising the steel sheet according to claim 2 , wherein the stainless steel foil has a thickness of 200 μm or less.

6. The stainless steel foil according to claim 5 , wherein the stainless steel foil is configured to be a catalyst carrier of an exhaust emission control device.

Assignees

• Jfe Steel Corp

Inventors

• Mizutani Akito
• Fujisawa Mitsuyuki

Classifications

• C21D8/02

  during manufacturing of plates or strips (C21D8/12 takes precedence) · CPC title

• C21D8/0236

  Cold rolling · CPC title

• C21D8/0226

  Hot rolling · CPC title

• C22C38/002

  containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60 · CPC title

• F01N3/2807

  Metal other than sintered metal (F01N3/2832 and F01N3/2835 take precedence) · CPC title