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Preparation method of a guide vane inner ring split combined hollow ceramic core

A hollow ceramic and ceramic core technology, applied in cores, casting molding equipment, casting molds, etc., can solve the problems of expensive molds, impermeable ceramic cores, easy to break cores, etc., to improve product qualification rate, The effect of reducing manufacturing difficulty and reducing casting deformation

Active Publication Date: 2016-03-16
SHENYANG MINGHE QUARTZ PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the integral ceramic core is used to form the complex inner cavity of the inner ring of the guide vane, it will be a major change in the precision casting process of the inner ring of the guide vane. However, the overall ceramic core is complex and large in size, with a maximum size of ￠560, and the cost of manufacturing molds is expensive. , requires a large size sintering furnace, and it is easy to deform and crack during sintering, and the qualified rate of the ceramic core is low
In addition, the overall ceramic core cannot be a hollow structure. Therefore, the ceramic core cannot be burned through, the strengthening effect is not good, the high temperature strength is not good, the core is easy to break and leak during pouring, and the core removal is not good.

Method used

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  • Preparation method of a guide vane inner ring split combined hollow ceramic core
  • Preparation method of a guide vane inner ring split combined hollow ceramic core
  • Preparation method of a guide vane inner ring split combined hollow ceramic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Prepare raw materials: SiO with a particle size of 220 meshes accounting for 33wt.% of the total weight of raw materials 2 Powder, 21wt.% SiO with a particle size of 300 mesh 2 Powder, 35wt.% ZrO with a particle size of 300 mesh 2 Mix the powder and 11wt.% binder, heat to 130°C to form a slurry, stir for 6 hours, then pour the slurry into the barrel of the ceramic core injection machine, and stir for later use;

[0038](2) Pressing the core: Heat the pot mold of the ceramic core to 45°C, control the clamping pressure to 6Mpa, and the grouting pressure to 3Mpa, inject the slurry into the pot mold of the ceramic core, and control the grouting time to 20 second, then keep the pressure for 20 seconds, open the mold, and obtain the basin portion of the ceramic core;

[0039] Replace the mold with a ceramic core back mold, repeat heating, grouting, and pressure holding to obtain the back of the ceramic core;

[0040] Put the basin and the back on the correction mold, p...

Embodiment 2

[0047] (1) Prepare raw materials: SiO with a particle size of 220 meshes accounting for 30wt.% of the total weight of raw materials 2 Powder, 18wt.% SiO with a particle size of 300 mesh 2 Powder, 35wt.% ZrO with a particle size of 300 mesh 2 Mix the powder and 17wt.% binder, heat to 130°C to form a slurry, stir for 6 hours, then pour the slurry into the barrel of the ceramic core injection machine, and stir for later use;

[0048] (2) Pressing the core: heat the pot mold of the ceramic core to 40°C with a fixture, control the clamping pressure to 6Mpa, and the grouting pressure to 3Mpa, inject the slurry into the pot mold of the ceramic core, and control the grouting time For 20 seconds, then hold the pressure for 20 seconds, open the mold, and obtain the basin portion of the ceramic core;

[0049] Replace the mold with a ceramic core back mold, repeat heating, grouting, and pressure holding to obtain the back of the ceramic core;

[0050] Put the basin and the back on the ...

Embodiment 3

[0056] (1) Prepare raw materials: SiO with a particle size of 220 meshes accounting for 37wt.% of the total weight of raw materials 2 Powder, 23wt.% SiO with a particle size of 300 mesh 2 Powder, 32wt.% ZrO with a particle size of 300 mesh 2 Mix the powder and 8wt.% binder, heat to 130°C to form a slurry, stir for 6 hours, then pour the slurry into the ceramic core injection machine barrel, and stir for later use;

[0057] (2) Compression core: Heat the pot mold of the ceramic core to 50°C with a fixture, control the clamping pressure to 6Mpa, and the grouting pressure to 3Mpa, inject the slurry into the pot mold of the ceramic core, and control the grouting time For 20 seconds, then hold the pressure for 20 seconds, open the mold, and obtain the basin portion of the ceramic core;

[0058] Replace the mold with a ceramic core back mold, repeat heating, grouting, and pressure holding to obtain the back of the ceramic core;

[0059] Put the basin and the back on the correctio...

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Abstract

The invention belongs to the technical field of precision casting, and in particular relates to a method for preparing a guide vane inner ring split combined hollow ceramic core. The present invention uses SiO2 powder, ZrO2 powder and binder as raw materials, heats to 120~140°C to form a slurry, injects the slurry into the mold, obtains the pot and back of the ceramic core, and combines the two together, Put it into a high-temperature furnace for roasting. After the roasting is completed, put it into the strengthening liquid and soak for 0.5~3 hours to obtain a split-type hollow ceramic core. Put 5 split-type hollow ceramic cores on the platform and combine them with ceramic bushings. Finally Form the split combined hollow ceramic core of the inner ring of the guide vane, and paint the yttrium sol at the joint to make it smooth and smooth. The method of the present invention manufactures split and combined hollow ceramic cores, which greatly reduces the manufacturing difficulty of the ceramic cores, effectively controls the size of the ceramic cores, and has the advantages of good high-temperature strength and easy detachment, thereby reducing casting deformation, The purpose of improving the product qualification rate.

Description

technical field [0001] The invention belongs to the technical field of precision casting, and in particular relates to a method for preparing a guide vane inner ring split combined hollow ceramic core. Background technique [0002] In order to improve the reliability of the engine, the manufacturing quality of important parts in the engine, such as the guide vane inner ring, needs to be improved urgently. In the past, the inner ring of the guide vane was mostly manufactured separately by forgings and castings or castings and castings, and then assembled into a needle body by welding. This manufacturing method has many welding stresses, and the parts are easily deformed. At the same time, it consumes a lot of manpower, material resources and financial resources. Patent No. 2010106147181 discloses a method for preparing the inner ring of the guide vane by opening the process window. Although it breaks through the traditional process of forming the inner ring of the guide vane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/10
Inventor 刘玉柱刘畅
Owner SHENYANG MINGHE QUARTZ PROD