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Precision casting method for engine vanes

An engine blade, precision casting technology, applied in casting and forming equipment and other directions, can solve the problems of many surface and internal defects of parts, insufficient casting process parameters, unreasonable design, etc., and achieve internal defect elimination, good elimination rate, and uniform internal structure. stable effect

Active Publication Date: 2014-01-15
浙江寰宇航空发动机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of mold forming methods and the unreasonable design of the parameters of the casting process, there are many surface and internal defects of the molded parts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Including mold design, mold manufacturing, raw material smelting, blanking preparation, centrifugal casting, first cooling, second forming, second cooling, trimming and sandblasting, hot isostatic pressing steps;

[0026] The steps of the mold design are: using a water-soluble core, using the existing CAD system to design the CAD model of the engine blade, using a rapid prototyping machine, and using the existing laser sintering to sinter the polystyrene powder with a diameter of less than 0.2mm layer by layer , and then soaked in wax to make a investment pattern, and then clean the surface and interior of the investment pattern;

[0027] The steps of mold manufacturing are as follows: immerse the investment pattern in the surface coating and dip it in the slurry for 35 seconds, then take it out, then sand and dry the surface layer to obtain a mold shell, put the mold shell into a heating furnace, and heat it at a temperature of 380 Keep warm at ℃ for 2.8h, then continu...

Embodiment 2

[0037] Including mold design, mold manufacturing, raw material smelting, blanking preparation, centrifugal casting, first cooling, second forming, second cooling, trimming and sandblasting, hot isostatic pressing steps;

[0038] The steps of the mold design are: using a water-soluble core, using the existing CAD system to design the CAD model of the engine blade, using a rapid prototyping machine, and using the existing laser sintering to sinter the polystyrene powder with a diameter of less than 0.2mm layer by layer , and then soaked in wax to make a investment pattern, and then clean the surface and interior of the investment pattern;

[0039] The manufacturing steps of the mold are as follows: immerse the investment pattern in the surface coating and dip it in the slurry for 30-45 seconds, then take it out, then sand and dry the surface layer to obtain a mold shell, put the mold shell into a heating furnace, and heat the mold shell at a temperature of Keep warm at 350-480°C...

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PUM

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Abstract

The invention discloses a precision casting method for engine vanes. The method comprises the steps of die designing, die manufacturing, raw material smelting, material preparing, centrifugal casting, primary cooling, post forming, secondary cooling, trimming, sand blasting and hot isostatic pressing. By means of the working procedures, the good elimination rate of defects of the surfaces and the interiors of the engine vanes can be ensured, and internal microstructures are more uniform.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a precision casting method for engine blades. Background technique [0002] Titanium alloy has low density, high specific strength, and corrosion resistance. Due to this series of excellent characteristics, it is widely used in aerospace industry, energy industry, marine transportation industry, etc. The European Space Agency has also launched an aeronautical research program aimed at mastering titanium-aluminum-based alloy aeroengine blades and gas turbine blades. Aircraft engine thrust-to-weight ratio is one of the main indicators for evaluating modern aircraft engines, and it plays a decisive role in aircraft performance. When it is currently applied to engine blades, the more common forming method is the precision casting method. TiAl-based alloy components prepared by investment casting technology, especially components with complex shapes, can obtain precision a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/10B22C7/02
Inventor 王强
Owner 浙江寰宇航空发动机有限公司
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