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Precision-investment casting method of titanium aluminum base alloy aircraft engine blade

A technology for investment precision casting and aircraft engine, which is applied in the field of investment precision casting of titanium-aluminum-based alloy aircraft engine blades, can solve the problems of complex processing procedures, low processing efficiency, deformation, etc., and achieves simple procedures, high processing efficiency, The effect of reducing the number of processing steps

Inactive Publication Date: 2009-10-28
HARBIN INST OF TECH
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Problems solved by technology

[0003] In order to solve the problems of different shapes and thin blades of aircraft engine blades, easy deformation, complex processing procedures and low processing efficiency when adopting the existing blank processing method, the present invention proposes a melting method for titanium-aluminum-based alloy aircraft engine blades. Mold precision casting method

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  • Precision-investment casting method of titanium aluminum base alloy aircraft engine blade
  • Precision-investment casting method of titanium aluminum base alloy aircraft engine blade

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Embodiment Construction

[0016] The investment casting method for titanium-aluminum-based alloy aircraft engine blades described in this embodiment adopts a water-cooled copper crucible vacuum induction melting centrifugal casting method, and the specific process is as follows:

[0017] Put the raw material to be smelted into the vacuum chamber of the water-cooled copper crucible;

[0018] Use argon to flush the melting chamber of the water-cooled copper crucible, and evacuate the vacuum chamber of the water-cooled copper crucible to 10 ～5 mbar~10 ～2 mbar, then filled with argon to 5.50mbar ~ 13mbar, and then vacuumed to 10 ～5 mbar~10 ～2 mbar, so repeated 2 to 6 times, and finally keep the vacuum degree in the smelting chamber of the water-cooled copper crucible at 10 ～5 mbar~10 ～2 Between mbar;

[0019] The raw materials in the water-cooled copper crucible are smelted in a water-cooled copper crucible induction melting furnace with a melting power of 330kW-350kW. After the smelting is completed,...

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Abstract

A precision-investment casting method of a titanium aluminum base alloy aircraft engine blade relates to a preparation method of an aircraft engine blade and solves the problems of easy deformation, complicated processing procedures and low processing efficiency caused by the thin aircraft engine blades with diverse shapes when the existing blank processing mode is adopted. The invention adopts a water jacketed copper crucible vacuum induction melting centrifugal casting method to realize the preparation of the titanium aluminum base alloy aircraft engine blade. The aluminum content of the titanium aluminum base alloy is 46-48at%. Under vacuum argon shield, the melting is implemented and the melting power is 330-350kW in the melting process. With the centrifugal casting technology adopted, the casting is carried out by adopting a bottom casting type casting system and a casting system composed of blade type shells. The preheating temperature of a casting type shell is 400-600 DEG C and the shell cools with a furnace after casting, and the oxygen content of the alloy is 0.04-0.08% after casting. The method is simple in technology, low in processing cost and is applicable to processing various aircraft engine blades.

Description

technical field [0001] The invention relates to the production of TiAl-based alloy aircraft engine blades by adopting an investment precision casting process. Background technique [0002] In recent years, due to its low density, high specific strength and specific modulus, good oxidation resistance and creep properties, and excellent fatigue properties, titanium-aluminum-based alloys have been widely used in the automotive industry, gas turbines, aero engines, and rocket engines. The broad application prospects have attracted extensive research by scholars at home and abroad. The European Space Agency launched the IMPRESS program in 2004, and one of the sub-topics is to master titanium-aluminum-based alloy aeroengine blades and gas turbine blades. In 2006, the Boeing Company of the United States announced that the two-stage blades behind the low-pressure turbine of the American General Motors engine used in its 787 civil airliner will use titanium-aluminum-based alloys, wh...

Claims

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Application Information

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IPC IPC(8): B22D13/00B22D13/10
Inventor 陈玉勇陈艳飞田竟肖树龙孔凡涛王惠光
Owner HARBIN INST OF TECH
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