Titanium alloy integral blade disc with composite performance and fabricating method thereof

An integral blade, titanium alloy technology, applied in the parts of the pumping device for elastic fluid, liquid fuel engine, metal material coating process, etc. Large and other problems, to achieve high-temperature fracture toughness and creep resistance, improve utilization and structural efficiency, and achieve the effects of small particle size

Active Publication Date: 2009-12-09
有研金属复材技术有限公司
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  • Application Information

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Problems solved by technology

The traditional method also has the disadvantages of complicated process, large reinforcement particles, poor distribution uniformity, interface reaction, low interface bonding strength and difficult part forming and processing in the preparation of particle-reinforced titanium matrix composites. Integration on
[0005] In addition, due to the shortcomings of titanium alloys such as low hardness, poor wear resistance, large friction coefficient and instability, at the same time when designing advanced engines, in order to achieve the highest efficiency, the gap between the titanium blades and the titanium casing should be reduced as much as possible, but Too small a gap will increase the possibility of titanium friction ignition, commonly known as "titanium fire", which also limits the wider application of titanium alloys
Aiming at the problem of poor wear resistance of titanium alloys, a variety of surface modification technologies for titanium alloys have been developed. The early technologies mainly include traditional surface technologies such as electroplating, thermal diffusion, thermal oxidation, PVD, and CVD. In recent years, with the development of new technologies Constantly emerging, modern surface technologies such as micro-arc oxidation, plasma spraying, supersonic spraying, ion implantation, electron beam deposition, laser nitriding, double-layer glow ion infiltration, and new technologies that combine various surface technologies and film structure design They are all applied to the surface modification of titanium alloys. These technologies have achieved remarkable results in improving the friction and wear properties of titanium alloys. The cladding is thin, or the impact resistance is poor, or it is weakly combined with the base material, etc.
In response to the "titanium fire" problem of titanium alloys, one is to develop flame-retardant titanium alloys, such as the Ti-V-Cr AlloyC flame-retardant titanium alloy developed in the United States, and the Ti-Cu-Al series BTT-1 and BTT-3 developed in Russia. Alloys, Ti-V-Cr series alloys have good flame retardancy and mechanical properti

Method used

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  • Titanium alloy integral blade disc with composite performance and fabricating method thereof
  • Titanium alloy integral blade disc with composite performance and fabricating method thereof
  • Titanium alloy integral blade disc with composite performance and fabricating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: TC4 titanium alloy material was prepared by laser melting deposition on TC4 titanium alloy substrate by laser melting deposition method.

[0056] The TC4 titanium alloy powder transported synchronously by laser melting was used to deposit thin-walled samples on the TC4 titanium alloy substrate layer by layer, and the tensile samples were obtained by mechanical processing, and the room temperature static load tensile test was carried out. The test results are shown in Table 1. , and the tensile mechanical properties of other forming processes are also given in Table 1. It can be seen that the mechanical properties of TC4 titanium alloy formed by laser deposition are equivalent to those of forging annealed state. The laser power used for laser melting deposition is 2.0kW, the scanning speed is 5.0mm / s, the beam diameter is 3.0mm, the powder feeding rate is 4.5g / min, and the powder particle size is 50-150μm. figure 1Photograph of the internal structure of TC4...

Embodiment 2

[0060] Example 2: Preparation of TA15 titanium alloy material by laser melting deposition on TA15 titanium alloy substrate by laser melting deposition method

[0061] The TA15 titanium alloy powder transported synchronously by laser melting was used to deposit thin-walled samples on the TA15 titanium alloy substrate layer by layer, and the tensile samples were obtained by mechanical processing, and the room temperature static load tensile test was carried out. The test results are shown in Table 2. , and the tensile mechanical properties of other forming processes are also given in Table 2. It can be seen that the mechanical properties of TA15 titanium alloy formed by laser deposition are equivalent to those of forging annealed state. The laser power used for laser melting deposition is 2.5kW, the scanning speed is 5.0mm / s, the beam diameter is 3.0mm, the powder feeding rate is 5.0g / min, and the powder particle size is 50-105μm. figure 2 Photograph of the internal structure o...

Embodiment 3

[0065] Example 3: Laser melting deposition of TC4+Cr on TC4 titanium alloy substrate by laser melting deposition method 3 C 2 Obtain in-situ TiC reinforced titanium matrix composites.

[0066] 90wt% TC4 powder and 10wt% Cr 3 C 2 Powder pre-mixed; pre-mixed TC4+10wt%Cr by laser melting deposition method 3 C 2 The powder is melted layer by layer by laser and deposited on the surface of TC4 titanium alloy substrate to prepare in-situ TiC reinforced titanium matrix composite material. The reaction process is 2Ti+Cr 3 C 2 =3Cr+2TiC, the laser power used is 3.0kW, the spot diameter is 3.0mm, the scanning speed is 4.0-6.0mm / s, the powder feeding rate is 4.2g / min, the powder particle size of TC4 titanium alloy is 50-105μm, Cr 3 C 2 The particle size of the powder is 45-75 μm. The hardness of the prepared titanium-based composite material is HRC 47-49. Laser Melting Deposition TC4+10wt%Cr 3 C 2 The microstructure analysis results of in-situ TiC reinforced titanium matrix com...

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Abstract

The invention relates to a titanium alloy integral blade disc with composite performance and a fabricating method thereof. A hub and a spoke of the blade disc are made of titanium alloy, a rim and a blade are made of titanium-base composite materials (or the whole disk is made of titanium alloy, and the blade is made of titanium-base composite materials), and the point of the blade also contains one or more of Cr, V, Mo with higher content so as to have properties of resisting temperature, abrasion and combustion. The hub and the spoke as well as the rim and the blade are sequentially prepared by piling layer by layer through adopting titanium alloy powder, one or more of titanium powder, TiC, B4C, and Cr3C2, and mixture powder of particles of one or more of Cr, V and Mo, which are synchronously conveyed and molten and deposited by adopting laser, so as to obtain the near net-shape titanium alloy integral blade disc with composite performance. The rim and the blade of the blade disc are integer, the hub and the spoke of the disc have high room temperature plasticity and strength as well as low cycle fatigue property, and the rim and the blade have high high-temperature fracture toughness property and high creep resistance.

Description

technical field [0001] The invention relates to a titanium alloy integral blade disc with composite performance and a manufacturing method thereof, belonging to the field of metal matrix composite materials and manufacturing thereof. Background technique [0002] Titanium alloy has low density, high specific strength, high yield ratio, corrosion resistance and good high-temperature mechanical properties. It is used in the manufacture of compressor rotor parts (compressor discs and blades) in modern high thrust ratio aeroengines. In recent years, the adoption of the integral blade disc structure (the compressor disc and the blade are integrated, the original tongue-and-groove connection structure has been canceled, the number of parts has been greatly reduced, and the overall weight has been significantly reduced. At the same time, because the integral blade disc can eliminate the traditional blade, The loss caused by the airflow escaping in the tenon and tenon groove in the ...

Claims

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Application Information

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IPC IPC(8): F04D29/26F04D29/02C22C14/00C23C24/10
Inventor 张永忠石力开席明哲郭宏徐骏尹法章张习敏
Owner 有研金属复材技术有限公司
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