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AssigneeALSTOM Technology Ltd
InventorsSorin Keller, Richard Brendon Scarlin, Markus Staubli, Rodney Williams Vanstone
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In a method for welding together two parts (12, 13), especially of a turbomachine, which are exposed to different temperatures, of which the first part (12) consists of a steel and the second part (13) consists of a nickel-base alloy which contains elements which are unfavorable for welding to steel, such as for example Nb, a crack-free welded joint is achieved by the fact that first of all an intermediate layer (18), in which the amount of unfavorable elements is progressively reduced from the inside outward, is applied to the joining surface (17) which is provided for the welding, and that then the second part (13), which has been provided with the intermediate layer (18), is welded to the first part (12).
Method for welding together two parts (12, 13), especially of a turbomachine, which are exposed to different temperatures, of which the first part (12) is made from a steel and the second part (13) is made from a nickel-base alloy, which nickel-base alloy contains additional elements, such as for example Nb, which, when joined to steel, cause the formation of cracks or unfavorable mechanical properties in the joining zone, characterized in that first of all an intermediate layer (18), in which the amount of the additional elements is progressively reduced from the inside outward, is applied to the joining surface (17), which is provided for the welding, of the second part (13), and in that then the second part (13), which has been provided with the intermediate layer (18), is welded to the first part (12).
Dependencies are inferred from the claim text.