Oxidation-resistant metal foil, its use and method for its production
AssigneeKrupp VDM GmbH
InventorsUlrich Heubner, Angelika Kolb-Telieps, Ralf Hojda
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Abstract
The invention relates to iron-chromium aluminum metal foil which is resistant to high-temperature oxidation. Said metal foil is produced by hot-dip aluminizing an iron-chromium support band with an aluminum-silicon alloy. The foil has the following composition in weight percent: 18-25% Cr. 4-10% Al, 0.03-0.08% Y, max. 0.01% Ti, 0.01-0.05% Zr, 0.01-0.05% Hf, 0.5-1.5% Si. It also contains residual iron and impurities resulting from the method of production. The total aluminum content of the coated metal foil is at least 7% near the surface and not less than 3% further inside.
Claims8
Process for the production of an iron-chromium-aluminum metal foil with great resistance to high-temperature oxidation, said process comprising:
- fire aluminizing an iron-chromium supporting ribbon with an aluminum-silicon alloy, thereby producing a foil composed of the following (in % of mass):
- 18-25% Cr
- 4-10% Al
- 0.03-0.08% Y
- max. 0.01% Ti
- 0-01-0.05% Zr
- 0.01-0.05% Hf
- 0.5-1.5% Si
- containing also residual iron and impurities resulting from the method of production, whereby the total aluminum contents of the coated metal foil at the surface is at least approximately 7% and does not drop below 3% towards the inside.
Iron-chromium-aluminum metal foil which is resistant to high-temperature oxidation, produced by fire aluminizing of an iron-chromium supporting ribbon with an aluminum-silicon alloy, whereby the composition of the foil, in mass percentages, is as follows:
- 18-25% Cr
- 4-10% Al
- 0.03-0.08% Y
- Max. 0.01% Ti
- 0.01-0.05% Zr
- 0.01-0.05% Hf
- 0.5-1.5% Si
- with residual iron and impurities resulting from the method of production, whereby the total aluminum content of the coated metal foil is at least approximately 7% near the surface and does not drop below 3% towards the inside.
Dependencies are inferred from the claim text.