摘要:
Nach dem Stand der Technik bereiten Laufschaufeln in der vierten Stufe einer Gasturbine, die eine Länge von 50cm überschreiten, Probleme bezüglich der mechanischen Festigkeit, weil beim Rotieren der Laufschaufeln zu große Fliehkräfte auftreten. Eine erfindungsgemäße Laufschaufel (16) in der vierten Reihe (V4) einer Gasturbine (41) weist durch einen hohen Keramikanteil eine geringere Dichte auf, so dass die Fliehkräfte reduziert sind.
摘要:
A method of manufacturing an article (10) from two metal workpieces (30,32), the first and second metal workpieces (30,32) define the outer profile of the article (10). The second workpiece (32) is thicker than the first workpiece (30). The first workpiece (30) has two flat surfaces (34,36) and the second workpiece has one flat surface (38) and one machined (42) surface (40). Stop of is applied to surface (34) to prevent diffusion bonding at preselected areas. The workpieces (30,32) are assembled into a stack (58) so that the flat surfaces (34,38) are in abutment. Heat and pressure are applied to diffusion bond the workpieces (30,32) together to form an integral structure (60). The integral structure (60) is placed in a die such that the first workpiece (30) faces a convex surface of the die. The integral structure (60) is heated to cause the integral structure (60) to be hot creep formed on the convex surface of the die. The integral structure (62) is hot formed in a superplastic forming die by heating and internally pressurising the integral structure (62) to cause a preselected area of the second workpiece to be hot formed to produce the article (10).
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur schnellen Herstellung von hohlen Komponenten von Strömungsmaschinen, insbesondere Turbinenschaufeln, für die Fertigungsentwicklung. Bei dem Verfahren wird die herzustellende Turbinenschaufel (1) in zwei oder mehrere Teilstücke (5, 6, 10, 11) derart unterteilt, dass keines der Teilstücke einen Hohlraum aufweist. Die zwei oder mehreren Teilstücke (5, 6, 10, 11) werden einzeln mittels eines Rapid-Prototype-Verfahrens gegossen und anschließend zur Bildung der hohlen Komponente (1) zusammengefügt. Das Verfahren ermöglicht die einfache und kostengünstige Herstellung von Turbinenschaufeln für die Fertigungsentwicklung, insbesondere für die Entwicklung der Kühlsysteme.
摘要:
Large gas turbine blades made from separate cast segments of superalloys are disclosed. The turbine blade is designed such that bond lines between adjacent segments are placed in low stress regions of the blade. The cast superalloy segments of the blades are aligned and fitted together with specified tolerances. The turbine blade segments are then joined by transient liquid phase bonding, followed by a controlled heat treatment which produces the desired microstructure in the bond region. The method allows for the production of large, high quality turbine blades by joining small, high quality cast superalloy sections, in comparison with prior attempts to cast large turbine blades as single pieces which have produced very low yields and high individual component costs.
摘要:
Es wird ein Verfahren zur Instandsetzung verschlissener Schaufelspitzen von Turbinenschaufeln beschrieben, bei dem die verschlissene Schaufelspitze entfernt wird, so daß die Höhe des verbleibenden Restschaufelblatts (2) einer standardisierten Höhe h entspricht, die Ist-Geometrie des Endes des Restschaufelblatts (2) in der Höhe h gemessen wird, ein Reparaturprofil (4) mit einer der Differenz zwischen einer Soll-Höhe H des instandgesetzten Schaufelblatts (1) und der standardisierten Höhe h des Restschaufelblatts (2) entsprechenden Dicke aus einem Reparaturmaterial mit einer der Ist-Geometrie des Endes des Restschaufelblatts entsprechenden Kontur geformt wird, und das Reparaturprofil (4) am Ende des Restschaufelblatts (2) angebracht wird.
摘要:
A titanium or titanium based alloy compressor blade (1) is given a wear-resistant portion such as a tip portion (2) by producing an interfitting male/female joint between the blade and the wear-resistant portion in which the joint portion of the latter is produced with inwardly directed corrugations and the former is pressed at elevated temperature after assembly of the two parts so as to cause the material of the blade to flow into and conform to the shape of the latter and to produce a diffusion bond between the two parts. Interlayers (7, 8) may be used to improve chemical compatibility between the respective parts.
摘要:
A transversely twisted hollow airfoil member is provided by diffusion bonding together airfoil components each having a skin or shell (32) in the form of a partial airfoil twisted transversely along its length (L) and one or more internal support ribs (50, 52, 54) having bonding surfaces (50a, 52a, 54a) which are not twisted transversely along their length. Each support rib extends substantially normal to a bonding plane (T) defined by bonding surfaces on the supporting ribs. As a result of the rib and bonding surface orientation, the airfoil components can be forged and the components bonded together at elevated temperature in short times between dies movable by high pressure toward one another normal to the bonding surfaces.
摘要:
A transversely twisted hollow airfoil member is provided by diffusion bonding together airfoil components each having a skin or shell (32) in the form of a partial airfoil twisted transversely along its length (L) and one or more internal support ribs (50, 52, 54) having bonding surfaces (50a, 52a, 54a) which are not twisted transversely along their length. Each support rib extends substantially normal to a bonding plane (T) defined by bonding surfaces on the supporting ribs. As a result of the rib and bonding surface orientation, the airfoil components can be forged and the components bonded together at elevated temperature in short times between dies movable by high pressure toward one another normal to the bonding surfaces.