Method for Welding Depending on a Preferred Direction of the Substrate
AssigneesSiemens Aktiengesellschaft, Fraunhofer Gesellschaft Zur FöRderung Der Angewandten Forschunge E. V.
InventorsSelim Mokadem, Norbert Pirch
Life of this patent
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Abstract
Welding repairs are often carried out on directionally solidified components that nevertheless do not possess the desired crystallographic surface alignment, which reduces mechanical strength. The method provided selects the direction of travel depending on the crystallographically preferred direction of the substrate such that no more misorientations occur. A laser beam may be used for remelting.
Claims15
-8. (canceled)
A method for welding a directionally solidified component, comprising:
- providing a substrate of the component that includes preferred crystallographic directions;
- moving an energy source and/or the substrate along a direction of movement;
- representing a solidification front as an interface between a melt and a solidified region of a melt, whereby the melt includes a temperature gradient on the solidification front;
- defining a first angle between a first preferred crystallographic direction of the substrate (4) and the temperature gradient on the solidification front;
- defining a second angle between the temperature gradient and a second preferred crystallographic direction on the solidification front;
- and
- moving the substrate and the energy source in such a manner that the preferred crystallographic direction, the first preferred crystallographic direction or the second preferred crystallographic direction, at the relatively small angle, first angle or second angle respectively, to the temperature gradient is not directed into an interior of the component at a surface.
A method for welding a directionally solidified component, comprising:
- providing a substrate of the component that includes a plurality of crystallographic directions;
- moving an energy source and/or the substrate along a direction of movement;
- representing a solidification front as an interface between a melt and a solidified region of a melt;
- selecting the direction of movement in such a manner that of the plurality of crystallographic directions favored at a surface on a solidification front, a direction of dendrite growth which has a projection in a direction of the surface normal, is initialized.
Dependencies are inferred from the claim text.