Hohen Temperaturen aussetzbares Bauteil, insbesondere Turbinenschaufel, und Verfahren zur Herstellung dieses Bauteils

摘要

An element for use at high temperatures, in particular a turbine blade, contains a first section (blade root 3) and a second section (blade leaf 2). The first section (3) is formed by a ductile material. By contrast, the second section (2) is a material which is brittle as compared with the ductile material but is resistant to high temperatures. Each of the two materials contains in each case alloys of different chemical composition. These alloys are hot-compacted, with formation of a boundary layer (6) joining the first (3) and the second (2) sections, to give a bimetallic composite material. A first alloy, forming the first section, contains predominantly titanium and/or nickel. A second alloy, forming the second section, contains a gamma-titanium aluminide with a content of at least 0.5 and at most 8 atom per cent of doping substance.