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Titanium-aluminum alloy turbine and preparation method thereof

A titanium-aluminum alloy, turbine technology, applied in mechanical equipment, machines/engines, engine components, etc., can solve the problems of poor strength stability, low strength, unfavorable component reliability, etc., to improve performance and stability, improve blade and cardiac performance for reliable application results

Pending Publication Date: 2022-07-01
BAIMTEC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the difference in the orientation of the core structure of the titanium-aluminum alloy turbine with oriented lamellar structure leads to low strength (see the macrostructure of the turbine core. figure 1 and 2 ), and the stability of strength is poor, which is not conducive to the reliability of components

Method used

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  • Titanium-aluminum alloy turbine and preparation method thereof
  • Titanium-aluminum alloy turbine and preparation method thereof
  • Titanium-aluminum alloy turbine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Alloy Melting:

[0030] The master alloy is prepared according to the theoretical composition (remainder) Ti-46Al-2.0V-1.5Cr-0.5(Zr+Hf+C+W)at%, and is smelted three times in a vacuum induction suspension melting furnace to obtain the master alloy.

[0031] Preparation before pouring:

[0032] Put the ceramic mold shell of yttrium oxide surface layer into the sand box, and fill the space between the mold shell and the sand box with refractory sand, as shown in Figure 3, in which magnesia sand is used as an example. The sand box is preheated, the preheating temperature is 600 ℃, and the temperature is kept warm.

[0033] Pouring and sonication:

[0034] The mother alloy is loaded into the crucible, and the ceramic shell flask is placed on the centrifuge plate. After being evacuated for 8 minutes, it is ready for pouring for electro-melting. After the alloy is melted, the smelting power is given to 140KW and kept for 2 minutes, the speed of the centrifuge is started to ...

Embodiment 2

[0038] Alloy Melting:

[0039] The master alloy is prepared according to the theoretical composition (remainder) Ti-45.5Al-2.2V-1.0Cr-0.2(Zr+Hf+C+W)at%, and is smelted three times in a vacuum induction suspension melting furnace to obtain the master alloy.

[0040] Preparation before pouring:

[0041] Put the ceramic mold shell of yttrium oxide surface layer into the sand box, and fill the space between the mold shell and the sand box with refractory sand, as shown in Figure 3, in which magnesia sand is used as an example. The sand box is preheated, the preheating temperature is 600 ℃, and the temperature is kept warm.

[0042] Pouring and sonication:

[0043] The mother alloy is loaded into the crucible, and the ceramic shell flask is placed on the centrifuge plate. After being evacuated for 8 minutes, it is ready for pouring for electro-melting. After the alloy is melted, the smelting power is given to 140KW and kept for 2 minutes, the speed of the centrifuge is started t...

Embodiment 3

[0047] Alloy Melting:

[0048] The master alloy is prepared according to the theoretical composition (remainder) Ti-46.5Al-1.5V-1.6Cr-0.5(Zr+Hf+C+W)at%, and is smelted three times in a vacuum induction suspension melting furnace to obtain the master alloy.

[0049] Preparation before pouring:

[0050] Put the ceramic mold shell of yttrium oxide surface layer into the sand box, and fill the gap between the mold shell and the sand box with refractory sand, as shown in Figure 3. In the figure, magnesia sand is used as an example. The sand box is preheated, the preheating temperature is 600 ℃, and the temperature is kept warm.

[0051] Pouring and sonication:

[0052] The mother alloy is loaded into the crucible, and the ceramic shell flask is placed on the centrifugal disc. After 8 minutes of evacuation, it is ready for pouring for electro-melting. After the alloy is melted, the smelting power is given to 140KW and kept for 2 minutes, the speed of the centrifuge is started to ...

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Abstract

The invention relates to a titanium-aluminum alloy turbine and a preparation method thereof, and aims to change a blade part of the turbine into a full-columnar crystal structure and a core part of the turbine into a fine equiaxed crystal structure, so that the use reliability of the titanium-aluminum alloy turbine is improved. A preparation method of a titanium-aluminum alloy turbine comprises the steps that master alloy is prepared, specifically, the master alloy comprises, by atom number percentage, 45.5%-46.5% of Al, 1.5%-2.2% of V, 1.0%-1.6% of Cr, smaller than or equal to 0.5% of microelements and the balance Ti; the trace elements comprise at least one of Zr, Hf, C and W; melting: melting the master alloy to obtain molten liquid; centrifugal pouring is conducted, specifically, a shell is prepared, and the molten liquid is centrifugally poured into the shell; ultrasonic treatment is conducted, specifically, centrifugal pouring is stopped, and ultrasonic treatment is conducted on the molten liquid at the position where the titanium alloy turbine core is located; and finally cooling and discharging.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a titanium-aluminum alloy turbine and a preparation method thereof. Background technique [0002] Titanium-aluminum alloy has low density, high specific strength and specific elastic modulus, and can still maintain sufficiently high strength and stiffness at high temperatures. At the same time, it also has good creep resistance and oxidation resistance. The most competitive material for lightweight and heat-resistant structural parts of , aerospace and automobiles. The application of titanium aluminum alloy will reduce the weight of the turbocharger turbine, reduce the rotational inertia of the turbine rotor system, improve the acceleration response of the exhaust gas turbocharged engine, reduce black smoke when starting or accelerating, and improve the reliability of the turbocharger shaft system. sexual purpose. However, the difference in the orientation of the titanium-al...

Claims

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Application Information

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IPC IPC(8): F01D5/28F02B37/00B22D13/00B22D27/00C22C1/03C22C14/00
CPCF01D5/28F01D5/286F02B37/00C22C1/03C22C14/00B22D13/00B22D27/00
Inventor 罗倩胡海涛黄宏左家斌李建崇
Owner BAIMTEC MATERIAL CO LTD
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