Method of producing ferritic stainless steel sheet
AssigneeJfe Steel Corporation
InventorsAkito Mizutani, Mitsuyuki Fujisawa
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Abstract
A method of producing a ferritic stainless steel sheet comprises subjecting an Al vapor deposited layer-equipped stainless steel sheet to a heat treatment at 600° C. to 1300° C. for 1 minute or more. The Al vapor deposited layer-equipped stainless steel sheet comprises a ferritic stainless steel and an Al vapor deposited layer thereon. The ferritic stainless steel sheet has a thickness of 100 μm or less and a chemical composition containing, in mass %, C: ≤0.030%, Si: ≤1.0%, Mn: ≤1.0%, P: ≤0.040%, S: ≤0.010%, Cr: 11.0-30.0%, Al: 4.0-6.5%, Ni: 0.05-0.50%, Mo: 0.01-6.0%, N: ≤0.020% s, and Zr: 0.01-0.20% and/or Hf: 0.01-0.20%, with a balance consisting of Fe and inevitable impurities. A thickness of the Al vapor deposited layer per one side is 0.5-10.0 μm.
Claims4
A method of producing a ferritic stainless steel sheet having a thickness of 100 μm or less and a chemical composition consisting of, in mass %,
- C:
- 0.030% or less,
- Si:
- 1.0% or less,
- Mn:
- 1.0% or less,
- P:
- 0.040% or less,
- S:
- 0.010% or less,
- Cr:
- 11.0% to 30.0%,
- Al:
- 10.9% to 20.0%,
- Ni:
- 0.05% to 0.50%,
- Mo:
- 0.01% to 6.0%,
- N:
- 0.020% or less, and
- at least one selected from the group consisting of Zr:
- 0.01% to 0.20% and Hf:
- 0.01% to 0.20%,
- with a balance consisting of Fe and inevitable impurities, the method comprising
- subjecting an Al vapor deposited layer-equipped stainless steel sheet to a heat treatment of holding in a temperature range of 600° C. to 1300° C. for 1 minute or more,
- wherein the Al vapor deposited layer-equipped stainless steel sheet comprising:
- a base steel sheet;
- and
- an Al vapor deposited layer on a surface of the base steel sheet,
- wherein the base steel sheet is a ferritic stainless steel sheet having a thickness of 100 μm or less and a chemical composition consisting of, in mass %,
- C:
- 0.030% or less,
- Si:
- 1.0% or less,
- Mn:
- 1.0% or less,
- P:
- 0.040% or less,
- S:
- 0.010% or less,
- Cr:
- 11.0% to 30.0%,
- Al:
- 4.0% to 6.5%,
- Ni:
- 0.05% to 0.50%,
- Mo:
- 0.01% to 6.0%,
- N:
- 0.020% or less, and
- at least one selected from the group consisting of Zr:
- 0.01% to 0.20% and Hf:
- 0.01% to 0.20%,
- with a balance consisting of Fe and inevitable impurities, and
- a thickness of the Al vapor deposited layer per one side is 0.5 μm to 10.0 μm.
A method of producing a ferritic stainless steel sheet having a thickness of 100 μm or less and a chemical composition consisting of, in mass %,
- C:
- 0.030% or less,
- Si:
- 1.0% or less,
- Mn:
- 1.0% or less,
- P:
- 0.040% or less,
- S:
- 0.010% or less,
- Cr:
- 11.0% to 30.0%,
- Al:
- 10.9% to 20.0%,
- Ni:
- 0.05% to 0.50%,
- Mo:
- 0.01% to 6.0%,
- N:
- 0.020% or less, and
- at least one selected from the group consisting of Zr:
- 0.01% to 0.20% and Hf:
- 0.01% to 0.20%, and
- one or more selected from the group consisting of
- REM:
- 0.01% to 0.20%,
- Cu:
- 0.01% to 0.10%,
- Ti:
- 0.01% to 0.50%,
- V:
- 0.01% to 0.50%,
- W:
- 0.01% to 6.0%,
- B:
- 0.0001% to 0.0050%,
- Ca:
- 0.0002% to 0.0100%, and
- Mg:
- 0.0002% to 0.0100%,
- with a balance consisting of Fe and inevitable impurities, the method comprising
- subjecting an Al vapor deposited layer-equipped stainless steel sheet to a heat treatment of holding in a temperature range of 600° C. to 1300° C. for 1 minute or more,
- wherein the Al vapor deposited layer-equipped stainless steel sheet comprising:
- a base steel sheet;
- and
- an Al vapor deposited layer on a surface of the base steel sheet,
- wherein the base steel sheet is a ferritic stainless steel sheet having a thickness of 100 μm or less and a chemical composition consisting of, in mass %,
- C:
- 0.030% or less,
- Si:
- 1.0% or less,
- Mn:
- 1.0% or less,
- P:
- 0.040% or less,
- S:
- 0.010% or less,
- Cr:
- 11.0% to 30.0%,
- Al:
- 4.0% to 6.5%,
- Ni:
- 0.05% to 0.50%,
- Mo:
- 0.01% to 6.0%,
- N:
- 0.020% or less, and
- at least one selected from the group consisting of Zr:
- 0.01% to 0.20% and Hf:
- 0.01% to 0.20%, and
- one or more selected from the group consisting of
- REM:
- 0.01% to 0.20%,
- Cu:
- 0.01% to 0.10%,
- Ti:
- 0.01% to 0.50%,
- V:
- 0.01% to 0.50%,
- W:
- 0.01% to 6.0%,
- B:
- 0.0001% to 0.0050%,
- Ca:
- 0.0002% to 0.0100%, and
- Mg:
- 0.0002% to 0.0100%,
- with a balance consisting of Fe and inevitable impurities, and
- a thickness of the Al vapor deposited layer per one side is 0.5 μm to 10.0 μm.
Dependencies are inferred from the claim text.