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A kind of blade root reinforced composite ceramic turbine blade and its integrated molding method

A composite ceramic and turbine blade technology, applied in the field of turbine blade manufacturing, can solve the problems of high requirements for matching brushing process, poor universality, low yield, etc., achieve good stress corrosion resistance, reduce shrinkage differences, and anti-resonance. Excellent performance

Active Publication Date: 2022-07-12
SHAOXING RES INST OF SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the manufacturing method of turbine blades is mainly the lost wax method, which includes the processes of making wax film, making shell, casting metal and shelling in sequence. This method has poor precision (only up to 0.1mm) and low strength. The problem of low yield and high requirements for supporting brushing process
In addition, the Chinese patent CN108119188B manufactured ceramic matrix composite turbine blades through weaving fiber technology, which not only changed the classic configuration of turbine blades to be suitable for weaving fibers, but the universality is poor, and the weaving fiber technology also has the problem of low precision , not suitable for universal production of turbine blades

Method used

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  • A kind of blade root reinforced composite ceramic turbine blade and its integrated molding method
  • A kind of blade root reinforced composite ceramic turbine blade and its integrated molding method
  • A kind of blade root reinforced composite ceramic turbine blade and its integrated molding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In parts by mass, 65 parts of silicon carbide micropowder with a particle size of 3 μm, 30 parts of silicon carbide fibers with a length of 2 μm and a diameter of 1 μm, 5 parts of carbon black with a particle size of 0.5 μm, 15 parts of high-density polyethylene, 10 parts of 75 parts of stearic acid and 75 parts of paraffin were mixed, and the ball mill was mixed for 5 hours at a material-to-ball ratio of 3:1 and 375 rpm. The resulting ball abrasive was placed in a granulator, and granulated at 170 ° C for 2 hours to obtain a particle size of 1 μm. injection material;

[0055] After the obtained injection material is melted in a cavity of an injection molding machine at 185°C, it is injected into a turbine blade mold under a pressure of 125 MPa for molding to obtain a green body;

[0056] The obtained green body was soaked in kerosene at 60°C for 8 hours for solvent degreasing, dried at 80°C for 2 hours, and then placed in a tube furnace at 400°C for 2 hours under argon...

Embodiment 2

[0066] In parts by mass, 65 parts of silicon carbide micropowder with a particle size of 3 μm, 30 parts of silicon carbide fibers with a length of 2 μm and a diameter of 1 μm, 5 parts of carbon black with a particle size of 0.5 μm, 24 parts of polypropylene, 12 parts of hard Fatty acid and 64 parts of paraffin were mixed, and the ball mill was mixed for 5 hours at a material-to-ball ratio of 4:1 and 350 rpm. injection material;

[0067] After the obtained injection material is melted in the cavity of an injection molding machine at 170 ° C, it is injected into a turbine blade mold under a pressure of 135 MPa for molding to obtain a green body;

[0068] The obtained green body was soaked in 50°C kerosene for 8 hours for solvent degreasing, dried at 80°C for 2 hours, and then placed in a 400°C tube furnace for 2 hours under argon for thermal degreasing to obtain a degreasing product;

[0069] The obtained degreased product was sintered at 1500° C. for 3 hours to obtain the blad...

Embodiment 3

[0072] In parts by mass, 65 parts of silicon carbide micropowder with a particle size of 3 μm, 30 parts of silicon carbide fibers with a length of 2 μm and a diameter of 1 μm, 5 parts of carbon black with a particle size of 0.5 μm, 15 parts of high-density polyethylene, 10 parts of 75 parts of stearic acid and 75 parts of paraffin wax were mixed, and the ball mill was mixed for 5 hours at a material-to-ball ratio of 5:1 and 350 rpm. injection material;

[0073] After the obtained injection material is melted in a cavity of an injection molding machine at 175°C, it is injected into a turbine blade mold under a pressure of 135 MPa for molding to obtain a green body;

[0074] The obtained green body was soaked in 50°C kerosene for 8 hours for solvent degreasing, dried at 90°C for 4 hours, and then placed in a 400°C tube furnace for 2 hours under argon for thermal degreasing to obtain a degreasing product;

[0075] The obtained degreased product was sintered at 1500° C. for 3 hou...

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Abstract

The invention belongs to the technical field of turbine blade manufacturing, and particularly relates to a blade root reinforced composite ceramic turbine blade and an integrated molding method thereof. The integrated molding method for a blade root reinforced composite ceramic turbine blade provided by the present invention includes the following steps: mixing and ball milling and granulating ceramic raw materials in sequence to obtain injection materials; the ceramic raw materials include silicon carbide micropowder, silicon carbide fiber, carbon black, binder, surfactant and lubricant; injecting the injection material into a turbine blade mold for molding to obtain a green body; degreasing and sintering the green body in sequence to obtain the blade root reinforced composite Ceramic turbine blades. The test results show that the density of the blade root reinforced composite ceramic turbine blade prepared by the method provided by the present invention is 2.95-3.06g / cm 3 ; Accuracy is 0.01mm; Excellent anti-resonance performance and good stress corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of turbine blade manufacturing, and particularly relates to a blade root reinforced composite ceramic turbine blade and an integrated molding method thereof. Background technique [0002] Turbine blades are an important component of the turbine section of a turbine engine. The high-speed rotating blades are responsible for sucking high-temperature and high-pressure airflow into the combustor (turbine engine) to maintain the engine's work. The existing turbine blades need to be assembled. Due to the low precision of the blades, resonance will occur, and the stress will be concentrated at the junction of the impeller and the blade, resulting in the fracture of the blade root, poor safety and short service life. The preparation process of turbine blades directly affects the accuracy of turbine blades and the strength of the connection between the blade and the blade root, which in turn directly affects the life...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/622C04B35/638B28B1/24
CPCC04B35/565C04B35/622C04B35/638B28B1/24C04B2235/424C04B2235/77C04B2235/9669C04B2235/6567
Inventor 李爱军茅思佳谢洪宾朱界高扬
Owner SHAOXING RES INST OF SHANGHAI UNIV
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