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Title
Einkristallines Schweissen von direktional verfestigten Werkstoffen
Date Issued
2009
Author(s)
Arjakine, N.
Bostanjoglo, G.
Burbaum, B.
Jambor, T.
Melzer-Jokisch, T.
Mokadem, S.
Ott, M.
Wilkenhöner, R.
Patent No
102009051823
Abstract
(A1) Durch die gezielte Auswahl von Verfahrensparametern bei Laserschweissen, Vorschub, Laserleistungsstrahldurchmesser und Pulvermassenstrom kann der Temperaturgradient gezielt eingestellt werden, der wesentlich entscheidend ist zum einkristallinen Wachstum beim Laserauftragsschweissen.
DE 102009051823 A1 UPAB: 20110519 NOVELTY - The process for directional solidification of a welding seam for application welding of a substrate (4) of a component, comprises directly solidifying the substrate of the component, which has dendrites (31), which extend in a substrate dendrites direction and in which the process parameter such as feed rate, laser power, weld beam diameter, powder beam focus and/or powder mass flow is developed in such a way that it guides to a local orientation of the temperature gradient (28) on solidification front, where the temperature gradient is less than 45 degrees C. DETAILED DESCRIPTION - The process for directional solidification of a welding seam for application welding of a substrate (4) of a component, comprises directly solidifying the substrate of the component, which has dendrites (31), which extend in a substrate dendrites direction and in which the process parameter such as feed rate, laser power, weld beam diameter, powder beam focus and/or powder mass flow is developed in such a way that it guides to a local orientation of the temperature gradient (28) on solidification front, where the temperature gradient is less than 45 degrees C to the substrate dendrites direction of the dendrites in the substrate. A melt is developed in and on the substrate. The substrate is formed through the supply of powder and/or material (7), in which the melt is completely covered by a laser beam and is overlapped. The powder is applied in layer-wise manner. The substrate has a nickel-based superalloy having a single crystal structure. The diameter of the powder is so small and has high temperature in weld laser beam. The temperature of the molten powder particles is 20 degrees C over the melting temperature of the powder particles. A laser is used for welding. USE - Process for directional solidification of a welding seam useful for application welding of a substrate of a component. ADVANTAGE - The process ensures directional solidification of a welding seam with improved corrosion resistance and quality.
Language
de
Institute
Patenprio
DE 102009051823 A: 20091104