| 摘要 |
Producing an integral bond between a first component made of high-grade steel and a second component made of aluminum or an aluminum alloy, comprises: coating the high-grade steel component with a nickel layer; coating the steel component coated with the nickel layer with an aluminum layer; arranging the coated steel component, and aluminum component or aluminum alloy component such that partial regions of first and second component are arranged parallel; and integral bonding of coated steel component to component by using cold metal transfer process. Producing an integral bond between a first component made of high-grade steel and a second component made of aluminum or an aluminum alloy, comprises: coating the high-grade steel component with a nickel layer; coating the high-grade steel component coated with the nickel layer with an aluminum layer; arranging the high-grade steel component coated with the nickel layer and aluminum layer, and the aluminum component or the aluminum alloy component such that partial regions of the first and the second component are arranged parallel to one another and bear areally against one another or are arranged with a gap of 0-3 mm; and integral bonding of the coated high-grade steel component to the component made of aluminum or an aluminum alloy by using the cold metal transfer process. An independent claim is also included for a heat exchanger (1) with an integral bond between a housing (2) and at least one tube plate, preferably a tube-bundle heat exchanger for cooling exhaust gases from an internal combustion engine, comprising many tubes (4) which conduct a first fluid and are accommodated in their end regions each in a tube plate, and a housing which surrounds the tubes, where a second fluid can flow through the housing and the second fluid can flow around the tubes, and the tube plates (3) are inserted in the housing such that a first duct conducting the first fluid is sealed from a second duct conducting the second fluid. The housing comprises high-grade steel, and the tube plates and the tubes conducting the first fluid comprise aluminum or an aluminum alloy. |
