A pouring process method for directional turbine blades with integral cast cover plate structure

A technology of turbine blades and process methods, applied in the directions of casting molds, casting mold components, manufacturing tools, etc., can solve the problem of reducing blade core wrapping rate and precision casting pass rate, ceramic core and glass tube fracture, ceramic core and glass. Pipe impact force and other problems, to achieve the effect of good fluidity, improved metallurgical quality, and improved precision casting qualification rate

Active Publication Date: 2016-06-29
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The blade has a complex inner cavity structure. The integral casting blade needs to make a ceramic core, while the integral casting cover plate structure turbine working blade needs to embed a glass tube in the part of the forming cover plate in the structure of the ceramic core. In the traditional casting process The pouring temperature is the same as the crystal pulling temperature. During the pouring process, the alloy liquid has a strong impact on the ceramic core and glass tube, which may easily cause the ceramic core and glass tube to break, reducing the core coverage rate of the blade and the pass rate of precision casting.

Method used

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  • A pouring process method for directional turbine blades with integral cast cover plate structure

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Embodiment Construction

[0020] Such as figure 1 As shown, a casting process method for directional turbine blades with integral cast cover plate structure includes the following steps:

[0021] Step 1: Put the prepared ceramic core and glass tube shell into the shell chamber, add the master alloy into the melting chamber, vacuum the shell chamber and the melting chamber, and when the vacuum degree of the shell chamber and the melting chamber reaches less than When it is greater than 6.67Pa, the heaters in the shell chamber and the melting chamber start to transmit power to heat the shell and melt the master alloy;

[0022] Step 2: Adjust the heater power of the melting chamber to the highest level. After the master alloy is melted into alloy liquid, control the temperature of the melting chamber at 1610°C for high-temperature melt treatment for 5 minutes, and control the vacuum degree of the melting chamber to not more than 5.00Pa;

[0023] Step 3: Control the temperature of the shell at 1490°C and ...

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Abstract

The invention relates to a blade pouring technique, and particularly relates to a pouring technique of a directional turbine blade with a block cast cover board structure. According to the technical scheme disclosed by the invention, the pouring technique of the directional turbine blade with the block cast cover board structure is as follows: alloy liquid is poured in a high-temperature state, and crystal is pulled in a low-temperature state. The invention provides a pouring technique of a directional turbine blade with a block cast cover board structure, the impact force on a ceramic core and a glass tube caused by the alloy liquid is reduced, the problems of deviation, leakage and breakage of the ceramic core and the glass tube in the pouring process are avoided, the metallurgical quality of the blade is ensured, and the qualified rate of precision casting is increased.

Description

technical field [0001] The invention relates to a blade pouring process method, in particular to a casting process method for an integrally cast cover plate structure directional turbine blade pouring process. Background technique [0002] The tip of the traditional turbine working blade is a cover-plate post-welding structure. With the improvement of engine performance, the requirements for the temperature bearing capacity of the blade are getting higher and higher. The blades of this cover-plate post-welding structure will fall off during use. , has brought hidden danger to the reliability of blade and engine. In order to better meet the requirements of improved engine performance, the manufacture of integrally cast cover plate structure turbine rotor blades is essential. [0003] The blade has a complex inner cavity structure. The integral casting blade needs to make a ceramic core, while the integral casting cover plate structure turbine working blade needs to embed a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C9/24
CPCB22C9/04B22C9/24
Inventor 彭志江张明俊乐献刚尚伟孙宝才
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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