TiAl-based alloy stator blade isothermal forming manufacturing method and device thereof

Abstract

The invention discloses a TiAl-based alloy stator blade isothermal forming manufacturing method and a device thereof, and belongs to the field of isothermal forming manufacturing methods. The method comprises the steps of machining blank manufacturing, isothermal pre-forging, isothermal final forging and heat treatment. The invention further provides a TiAl-based alloy stator blade isothermal forming device. Compared with a commonly-adopted machining mode that a square blank is extruded and then machined into a part, and due to the fact that the extruded square blank is not deformed, the structure and the performance of a prepared stator blade cannot meet the design requirements, according to the method provided by the invention, blade forging forming is achieved through machining blank manufacturing and isothermal forming, and then the blank is machined into a part. Due to the fact that a TiAl-based alloy is large in deformation resistance and poor in shaping, a common forming methodcannot be achieved, so that the blank manufacturing process is a major problem needing to be solved. According to the method, turning is adopted for blank manufacturing, the blank shape is close to the shape of a final forging, isothermal forging forming is adopted, and uniform deformation of all parts of a blade is achieved, so that the structure and the performance of the blade forging are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of isothermal forming manufacturing methods, and in particular relates to an isothermal forming manufacturing method of a TiAl-based alloy stator blade and a device thereof. Background technique [0002] TiAl-based alloy has low density, high temperature strength, good oxidation resistance and rigidity. At the same time, it also has good creep resistance. In recent years, with the improvement of forming and processing capabilities, it has gradually become a substitute for aero-engine high-pressure compressors. The parts are originally made of high-temperature alloy materials, and it is one of the preferred materials to achieve weight reduction and increase thrust-to-weight ratio. [0003] An axial flow compressor consists of a rotor and a stator. The stator is the general term for the stator assembly, which is the non-rotating part of the compressor, including the casing and the stator blade assembly. Howe...

AI Technical Summary

Problems solved by technology

Although the research on TiAl-based alloys includes optimization of its composition, improvement of large-size ingot smelting process, step-by-step extrusion blanking, microstructure and performance control, and bar quality inspection, the plastic processing of TiAl-based alloys The research is only to obtain the fine-grained structure, while improving the shaping of the material, and precisely control the hot deformation process of the alloy to reduce the composition segregation and control the grain size, but it cannot control the difficulty of shaping during the forming process.

[0004] At present, the commonly used processing method is to extrude the billet and then machine it into parts. Since the extruded billet is not deformed, the structure and performance of the stator vane prepared by it cannot meet the design requirements.

Images