Coating and forming method for disk-type parts

Abstract

The invention belongs to the manufacturing technology of disk blanks made of titanium alloy and high temperature alloy, and relates to a coating and forming method for disk-type parts. According to the invention, an air compressor disk or a turbine disk is prepared with titanium alloy and high temperature alloy according to a layer-by-layer coating / thermal machining method which is low in raw material requirements, high in efficiency, low in cost, uniform in tissues of prepared parts, and high in performance of the prepared parts. The method is suitable for preparing various disk-type or ring-type parts made of titanium alloy and high temperature alloy used in the aerospace industry.

Description

technical field [0001] The invention belongs to the manufacturing technology of titanium alloy and high-temperature alloy disk blanks, and relates to a cladding forming method of disk parts. Background technique [0002] Disk parts are the most commonly used rotor components in compressors and turbines in high thrust-to-weight ratio turbine engines. The harsh working environment in compressors and turbines has very strict requirements on the performance of rotor components. Therefore, the manufacturing technology of disk structures is the engine One of the key manufacturing technologies. [0003] In high thrust-to-weight ratio turbine engines, commonly used titanium alloy components include: fan blades, drive shafts, casings, compressor disks, and other connecting structures. Among them, the number of compressor discs using titanium alloy is relatively large, and titanium alloy blisks can be used in low-pressure compressors and medium-pressure compressors. In low-pressure ...

AI Technical Summary

Problems solved by technology

When manufacturing high-temperature alloy blanks, due to high alloying elements, it is easy to cause element segregation, resulting in uneven structure and performance of parts;

[0009] 2. The powder method is used to prepare compressor disks and turbine disks. The manufacturing process is long, costly, and inefficient. The requirements for equipment are high and the investment is huge.

The use of powder to prepare compressor disks and turbine disks has high requirements on the process, otherwise it is easy to cause powder contamination, resulting in a decline in the performance of the parts;

[0010] 3. The incremental forming method can be used to prepare compressor disks and turbine disks, but the structure is generally as-cast structure, and it is difficult to control the structure and performance

The existing incremental forming technology generally discretizes the casting process, and the melting of the metal blank is discrete into the melting of multiple local areas, which has great advantages. However, since the incremental forming is the melting of the metal and then solidification As-cast structure, its performance is sacrificed, so the structure of many metal incrementally formed parts is difficult to control;

[0011] 4. Spray deposition method to prepare turbine disk technology is a new technology developed in recent years. This technology combines the atomization (rapid solidification) of liquid metal with the deposition of atomized molten droplets to prepare overall dense, uniform composition, and microstructure. Materials or blanks that are refined, structurally complete, and close to the final shape of the part are immature in the preparation of large-scale turbine disk parts, and their density can generally reach 99% due to argon atomization, which has a certain impact on the final performance

[0012] In order to obtain high-performance and long-life metal parts, conventional metal parts manufacturing processes often carry out thermomechanical processing (forging, extrusion, rolling, etc.) Subsequent thermomechanical processing of already formed parts

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