Multi-walled pipe and manufacture thereof
AssigneeTI Automotive (Heidelberg) GmbH
InventorSebastian Meier
Life of this patent
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Abstract
A multi-walled pipe and a method for its manufacture involves a steel sheet forming a steel source layer to which a nickel source layer is applied on at least one or both sides. A solder source layer is applied to the one nickel source layer, or one of the two, or both, nickel source layers. The multi-walled pipe is formed from a strip of the coated metal sheet, by means of rolling. The walls of the pipe are soldered by means of heating. In one form, the heating takes place by radiation. In another, it takes place by induction.
Claims21
A method for manufacturing multi-walled pipes, wherein a coated metal sheet includes a steel source layer, a nickel source layer applied to at least one side of the steel source layer, and at least one solder source layer applied to the at least one nickel source layer, said method comprises forming the multi-walled pipe from at least a strip of the coated metal sheet by means of rolling, and wherein the walls of the pipe are soldered by heating.
A multi-walled pipe formed from a multi-layered metal strip having planar sides, by means of rolling, wherein each wall of the pipe comprises a steel source layer, wherein at least one side of said steel source layer is coated with a solder layer, and said at least one solder layer is coated with a nickel layer, wherein the steel source layer has a region with nickel concentrations increasing toward the solder layer, and wherein the solder layers have a region of nickel concentrations increasing toward the steel layers.
Dependencies are inferred from the claim text.