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Title
Verfahren und Vorrichtung zum Schweissen von Werkstuecken aus hochwarmfesten Superlegierungen
Date Issued
2009
Author(s)
Arjakine, N.
Bostanjoglo, G.
Burbaum, B.
Jambor, T.
Melzer-Jokisch, T.
Ott, M.
Wilkenhöner, R.
Patent No
102009049518
Abstract
(A1) Es wird eine Schweissvorrichtung zum Schweissen von Werkstuecken (9) aus hochwarmfesten Superlegierungen zur Verfuegung gestellt. Diese umfasst: - eine Waermequelle (3) zum Erzeugen einer Waermeeintragszone (11) auf der Werkstueckoberflaeche (10); - eine Zufuhreinrichtung (5) zum Zufuehren von Schweisszusatzwerkstoff (13) in die Waermeeintragszone und - eine Transportvorrichtung (15) zum Erzeugen einer Relativbewegung zwischen der Waermequelle (3) und Zufuhreinrichtung (5) einerseits sowie der Werkstueckoberflaeche (10) andererseits. Die Schweissvorrichtung umfasst weiterhin eine Steuereinheit (17) mit einem Steuerprogramm, welches die Relativbewegung so durchfuehrt, dass die Schweissleistung sowie der Durchmesser der Waermeeintragszone (11) so eingestellt sind, dass die Abkuehlrate bei der Erstarrung des Materials mindestens 8000 Kelvin pro Sekunde betraegt.
EP 2311597 A1 UPAB: 20110503 NOVELTY - The method for welding workpieces (9) made of high temperature resistant superalloys, comprises applying a welding filler material (13) on the workpiece surface by a heat input zone (11) and a supply zone for the supply of the filler material into the heat input zone, where the heat input zone and the supply zone and/or the workpiece surface (10) are moved relative to each other. The welding parameters such as welding power, processing speed, diameter of the welding beam are selected so that the cooling rate during the hardening of the material is 8000 (K/s). DETAILED DESCRIPTION - The method for welding workpieces (9) made of high temperature resistant superalloys, comprises applying a welding filler material (13) on the workpiece surface by a heat input zone (11) and a supply zone for the supply of the filler material into the heat input zone, where the heat input zone and the supply zone and/or the workpiece surface (10) are moved relative to each other. The welding parameters such as welding power, processing speed, diameter of the welding beam are selected so that the cooling rate during the hardening of the material is 8000 (K/s). The welding parameters are adjusted related to the welding power and/or the diameter of the heat input zone. The processing speed is 500 mm/min. The welding seam is produced by a layer-wise application of the filler material. The previously applied layer with low layer strength is melted. The heat input zone and the supply zone are moved along a welding direction relative to the workpiece surface for each layer, and the welding directions are rotated against each other. The heat input zone and the supply zone are moved along a welding direction on a path oscillating around the welding direction relative to the work piece surface. The workpiece comprises a gamma -containing nickel based-superalloy and the filler material is gamma -forming nickel based-superalloy material. A heat treatment is carried out on the application of the filler material. A 300 W-laser or neodymium: yttrium aluminum garnet laser is used, where lambda is equal to 1.06 mu m. The laser power is 100-150 W. The diameter of a laser beam is 600 mu m. A polycrystalline weld seam is obtained. An INDEPENDENT CLAIM is included for a welding device for welding of workpieces such as gas turbine blades. USE - Method useful for welding of workpieces. ADVANTAGE - The method ensures economical welding of workpieces with good durability.
Language
de
Institute
Patenprio
DE 102009049518 A: 20091015