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Preparation method of low pressure guide connected hollow blade

A low-pressure guide and blade technology, applied in the field of precision casting, can solve the problems of low qualified rate of finished products and high brazing cost, and achieve the effect of refining grain structure, improving manufacturing qualification rate and reducing porosity

Inactive Publication Date: 2011-04-20
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the loose defects on the surface of the blade can only be dealt with by polishing or brazing, but it is difficult to completely eliminate the defects by polishing and polishing, and the qualified rate of finished products after brazing is also extremely low, and the cost of brazing is very high

Method used

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  • Preparation method of low pressure guide connected hollow blade
  • Preparation method of low pressure guide connected hollow blade
  • Preparation method of low pressure guide connected hollow blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The preparation of the first-stage guide conjoined hollow blade is carried out according to the following process steps:

[0022] (1) Preparation of the hollow conjoined blade core: First, the ingredients are formulated according to the following weight percentages, 65% of quartz glass powder, 15% of mullite powder, 20% of additives, and 18% of plasticizer; then The well-stirred core powder is injected into the core pressing equipment, the pressing temperature is 96°C, the injection pressure is 4.0MPa, after holding the pressure for 22s, it is taken out and put into the calibration mold to make the mother core; finally put it in the material tank Insert the quartz glass powder with a height of 180mm, insert the mother core into the powder vertically, the distance between the lower end of the mother core and the bottom of the material tank is controlled at more than 30mm, and the distance between the mother core is 30mm, use quartz glass powder To fill the ...

Embodiment 2

[0026] Embodiment 2: The preparation of the two-stage guide hollow conjoined blade is carried out according to the following process steps:

[0027] (1) Preparation of the hollow conjoined blade core: First, the ingredients are formulated according to the following weight percentages, 65% of quartz glass powder, 15% of mullite powder, 20% of additives, and 20% of plasticizer; then The well-stirred core powder is injected into the core pressing equipment, the pressing temperature is 105°C, the injection pressure is 4.8MPa, after holding the pressure for 20s, it is taken out and put into the calibration mold to make the mother core; finally, put it in the material tank Insert the quartz glass powder with a height of 200mm, insert the mother core into the powder vertically, control the distance between the lower end of the mother core and the bottom of the tank at more than 30mm, and the distance between the mother core is 30mm, use quartz glass powder To fill the entire tank, pr...

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Abstract

The invention relates to the precision casting field, in particular to a preparation method of a low pressure guide connected hollow blade. The preparation method comprises the following steps: firstly quartz glass powder, mullite powder, a plasticizer and an additive are mixed to stir evenly, the mixture is filled in a core pressing device and prepared into a mother core; secondly quartz glass powder is filled in a charging bucket, the mother core is inserted in the powder, the quartz glass powder is filled in the entire charging bucket to sinter and prepare a core; the prepared core is placed in the corresponding place of a blade mould to fill wax, the mould is preheated to perform pressing, finally the obtained wax mould is dressed; then a pouring system shell is prepared; and the pouring system shell is preheated before pouring, a K417G alloy is used as the raw material, then the alloy raw material is refined at 1570+ / -10 DEG C for no less than 3 minutes, finally the liquid alloy steel is poured in the preheated pouring system shell, the pouring time is 3-5 seconds, and the finished product low pressure guide connected blade casting is formed.

Description

technical field [0001] The invention relates to the field of precision casting, in particular to a method for preparing a low-pressure guide conjoined hollow blade. Background technique [0002] In recent years, the manufacturing technology of low-pressure guide vanes has made great progress, and hollow conjoined products have been prepared. The low-pressure first-stage and second-stage guide conjoined blades of aero-engines are conjoined blades. The high-temperature and high-pressure working environment requires the blades to have high surface quality and no metallurgical defects are allowed. If there is a metallurgical problem in any one of the conjoined blades, the entire blade will be scrapped, so the requirements for the production process are higher. At present, the overall precision casting technology is used to prepare low-pressure guide conjoined blades. Corundum sand powder and silica sol are used as coatings for the mold shell. It is found through fluorescence de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/22
Inventor 费晶王铁军王永明白素春孙长波
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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