Titanium-aluminium alloy blisk and manufacturing method thereof

An integral blisk, titanium-aluminum alloy technology, applied in mechanical equipment, liquid fuel engines, components of pumping devices for elastic fluids, etc., can solve problems such as difficult control, welding cracks, large residual stress, etc., and achieve residual The effect of small stress, reducing technical difficulty and improving connection quality

Inactive Publication Date: 2015-05-20
BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Other methods, such as electron beam welding, need to cladding TiAl and other materials during welding, the residual stress is large, welding cracks are prone to occur, and it is difficult to control

Method used

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  • Titanium-aluminium alloy blisk and manufacturing method thereof
  • Titanium-aluminium alloy blisk and manufacturing method thereof
  • Titanium-aluminium alloy blisk and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation process is specifically:

[0057] (1) The Ti of the overall blisk is forged by precision forging 2 AlNb disk-shaped parts, the shape is processed by CNC, such as figure 1 shown;

[0058] (2) The TiAl blades of the overall blisk are forged by the method of precision forging, and the shape is processed by numerical control, such as figure 2 shown;

[0059] (3) The method of chemical washing is used to treat Ti 2 The surface of the AlNb disc and TiAl blade is treated to remove the scale and dirt on the surface;

[0060] (4) Put Ti 2 The AlNb disk and TiAl blade are combined together, as shown in Figure 3(a), put into the cold spray equipment, and a layer of TC4 sheath is coated on the outer surface of the combined blade and disk, in which the cold Spraying process parameters: the preheating temperature is 500°C, the material acceleration is 800m / s, and the spraying distance is 10mm. The spraying sheath is a TC4 alloy casing with a thickness of about...

Embodiment 2

[0064] The preparation process is specifically:

[0065] (1) The TiAl disk-shaped piece of the overall blisk is forged by precision forging, and the shape is processed by numerical control, such as figure 1 shown;

[0066] (2) The TiAl blades of the overall blisk are forged by the method of precision forging, and the shape is processed by numerical control, such as figure 2 shown;

[0067] (3) adopt the method for chemical cleaning to treat the surface of TiAl disk and TiAl blade, remove surface oxide skin and dirt;

[0068] (4) Combine the TiAl disk and TiAl blade, as shown in Figure 3(a), put it into the electron beam forming equipment, and coat a layer of Q235 on the outer surface of the combined blade and disk Sheath, wherein the welding speed is 100mm / min, the angle is 50°, and the wire feeding speed is 160cm / min. The sheath of the electron beam forming is a Q235 sheath with a thickness of about 1mm that covers the blade and the disk. This shell wraps the blade and t...

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Abstract

The invention provides a titanium-aluminium alloy blisk and a manufacturing method of the titanium-aluminium alloy blisk. The method includes the steps of firstly, manufacturing a disc piece and blades of the blisk; secondly, combining the disc piece and the blades according to preset positions, placing the disc piece and the blades in a coating device, and coating the outer face of the disc piece and the outer faces of the blades with metal wrapping covers according to the appearance of the disc piece and the blades so as to obtain prefabricated blanks wrapped by the wrapping covers, wherein the thicknesses of the wrapping covers preferentially each range from 1 mm to 2 mm; thirdly, conducting hot isostatic pressure machining on the prefabricated blanks wrapped by the wrapping covers so as to obtain a prefabricated blank of the blisk; fourthly, conducting postprocessing on the prefabricated blank of the blisk to obtain the titanium-aluminium alloy blisk. Due to the fact that the titanium-aluminium alloy blisk can be connected under the low-temperature condition, the influences on original structures and performance are small, the original organization structure of the obtained blisk can be more integrated, and the more excellent performance can be achieved.

Description

technical field [0001] The invention relates to the field of metal processing, in particular to a titanium-aluminum alloy integral blisk and a preparation method thereof. Background technique [0002] In high thrust-to-weight ratio aero-engines, as the rotor speed gets higher and higher, the operating temperature of the compressor rotor components is getting higher and higher. The operating temperature of the blade part and the blisk part are different, and the load conditions are different. In order to meet According to the performance requirements of different parts, the whole blisk has been developed, that is, the blade part is made of one material, and the blisk part is made of another material. The overall blisk can meet the use requirements of different parts, improve performance, reduce weight and reduce fuel consumption. [0003] The preparation methods of the blisk mainly include: isothermal forging method, linear friction welding method and other methods. Electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F04D29/26
CPCB23P15/00F04D29/26F05D2230/42F05D2230/90
Inventor 李志强赵冰侯红亮韩秀全廖金华曲海涛
Owner BEIJING AERONAUTICAL MFG TECH RES INST
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