Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1986-08-27
1988-03-08
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
181244, B32B 1518
Patent
active
047299290
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a highly corrosion resistant aluminized steel sheet suitable for use in the manufacture of parts of an exhaust gas system. Aluminized steel sheets according to the invention are highly resistive against corroding actions of both alkaline and acidic substances and exhibit an excellent oxidation resistance at an elevated temperature, and therefore are particularly suitable for use in the manufacture of parts of an automobile exhaust gas system, which are subjected to a wet corroding action of drain formed therein and exposed to a hot oxidizing atmosphere.
PRIOR ART
In machines and apparatus, involving combustion of fossil fuels, in particular petroleum fuels, such as internal engines, boilers and heating instruments, the material of those parts coming in contact with a combustion exhaust gas is required to be oxidation resistant at an elevated temperature. As such a material, aluminized steel sheets are known. They are widely used in the manufacture of parts of an automobile exhaust gas system, since they are inexpensive, when compared with heat resistant steels and stainless steels which contain relatively high proportions of expensive alloying elements, and still have a certain extent of oxidation resistance at an elevated temperature. Especially, in view of their improved heat resistance, Type I aluminum hot dip coated steel sheets having a suitable amount of Si incorporated in the Al coatings are used in the above-mentioned applications. As the steel substrate of such aluminized steel sheets, Ti-added chromium steels are known.
For example, JP, No. 52-33579 discloses a heat resistant aluminized steel sheet having a substrate of chromium alloy steel consisting essentially of, in % by weight, at least 5% but less than 15% of Cr, up to 2.0% of Si, up to 0.1% of C, and preferably at least one of Ti, Zr and Nb in an amount sufficient to react with the carbon and nitrogen in the steel to form carbides and nitrides, the balance being Fe and unavoidable impurities.
JP, No. 56-102556 discloses a heat resistant aluminized steel sheet having a steel substrate consisting essentially of, in % by weight, from 0.001 to 0.02% of C, from 0.02 to 5% of Cr, from 0.05 to 1.0% of Mn, from 0.04 to 2.0% of Si, from 0.01 to 0.10% of Al, up to 0.010% of N, and from 0.2 to 0.6% of Ti, the ratio Ti/(C+N) being at least 20, the balance being Fe and unavoidable impurities.
In addition to such aluminized steel sheets, some chromium-containing steel alloys have also been proposed for use in the manufacture of parts of an automobile exhaust gas system.
For example, JP. No. 54-23327 discloses an oxidation resistant steel having excellent workability and processability consisting essentially of, in % by weight, more than 5% but less than 11.5% of Cr, from 0.5 to 2.0% of Si, up to 0.05% of C, from 0.1 to 0.4% of Mn, and optionally at least one of Ti and Zr in an amount sufficient to combine with C and N in the steel to form carbides and nitrides thereof, the balance being Fe and unavoidable impurities.
JP, No. 54-35571 discloses an oxidation resistant steel consisting essentially of, in % by weight, more than 3.0% but not more than 6.0% of Cr, from 0.5 to 2.0% of Si, more than an amount as unavoidable impurities but not more than 4.0% of Al, up to 0.5% of Mn, up to 0.05% of C, and optionally at least one of Ti and Zr in an amount of up to 0.9%, the balance being Fe and unavoidable impurities.
JP, No. 58-224148 discloses a chromium steel suitable for use in the manufacture of parts of an automobile exhaust gas system consisting essentially of, in % by weight, up to 0.02% of C, more than 1.5% but less than 3.0% of Si, up to 0.50% of Mn, more than 5.0% but less than 10.0% of Cr, from 0.05 to 0.80% of Cu, up to 0.003% of S, up to 0.02% of N, and optionally at least one of Ti, Nb and Zr in an amount of up to 0.30% in total, the balance being Fe and unavoidable impurities.
JP, No. 59-179758 discloses a highly corrosion resistant chromium steel suitable for use in the manufacture of par
REFERENCES:
patent: 3881881 (1975-05-01), Kim
patent: 3881882 (1975-05-01), Hughes et al.
patent: 3905780 (1975-09-01), Jasper et al.
patent: 4150178 (1979-04-01), Yagi et al.
patent: 4248908 (1981-02-01), Nickola
patent: 4264684 (1981-04-01), Allegra et al.
patent: 4584211 (1986-04-01), Higuchi et al.
patent: 4591395 (1986-05-01), Steel, Jr. et al.
patent: 4624895 (1986-11-01), Nickola
Fujita Shohei
Shinoda Ken-ichi
Nisshin Steel Co. Ltd.
Zimmerman John J.
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