High-temperature-resistant component of high-grade steel with a cobalt-containing coating, exhaust-gas treatment unit and method for producing such an exhaust-gas treatment unit
AssigneeEMITEC Gesellschaft fuer Emissionstechnologie mbH
InventorDIETER LUTZ
Life of this patent
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Abstract
A high-temperature-resistant component for an exhaust-gas treatment unit, an exhaust-gas treatment unit and a method for producing such a unit, include providing the component or the exhaust-gas treatment unit with a surface layer intended to prevent the formation of chromium carbide bridges during a brazing process for producing the exhaust-gas treatment unit.
Claims9
A high-temperature-resistant component for an exhaust-gas treatment unit, the component comprising:
- a material formed at least of iron, chromium and aluminum;
- an at least partial surface layer at least containing cobalt;
- and
- said surface layer being a physical vapor deposition layer.
An exhaust-gas treatment unit for an exhaust system, the exhaust-gas treatment unit comprising:
- at least one component formed of a material containing at least iron, chromium and aluminum, said at least one component at least partially having a surface layer at least containing cobalt;
- other individual parts;
- brazed connecting points connecting said at least one component to itself or to said other individual parts;
- and
- at least said component having a coating applied to said surface layer.
A method for producing an exhaust-gas treatment unit, the method comprising the following steps:
- providing at least one corrosion-resistant and high-temperature-resistant component formed of a material containing at least iron, chromium and aluminum;
- at least partially applying a surface layer at least containing cobalt to the at least one component;
- producing brazed connections at connecting points on the at least one component by brazing in a vacuum or in a protective gas;
- and
- applying a washcoat at least to the at least one component.
Dependencies are inferred from the claim text.