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Hollow cast ceramic core and its preparation method

A technology for ceramic cores and castings, applied in the field of hollow casting ceramic cores and their preparation, achieves the effects of high casting qualification rate, good dimensional accuracy and small shrinkage rate

Inactive Publication Date: 2007-07-18
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the existing high-pressure turbine hollow blade ceramic core production process, the invention provides a hollow casting ceramic core and a preparation method thereof

Method used

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  • Hollow cast ceramic core and its preparation method

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Effect test

Embodiment 1

[0032] 1. Ingredients

[0033] The matrix material is a mixture of quartz glass powder and silica porous material, and the quartz glass powder accounts for 60% of the matrix material by weight percentage, and the silica porous material accounts for 40% of the matrix material; the mineralizer material is selected from mullite (3Al 2 o 3 .2 SiO, particle size ≤ 53 μm, GB / T12215-90, produced by Meihekou), the proportion of core material is calculated by weight percentage: 83% of matrix material, 17% of mineralizer material. The plasticizer material is a mixture of 97% white paraffin (GB254-87, 50~60#) and 3% high-pressure polyethylene (HG2-299-65, A grade) by weight percentage, and the plasticizer material accounts for the base material and mineral 16% of the total weight of the agent material.

[0034] Quartz glass powder is made of quartz glass balls (JC177-81, SiO 2 ≥99.97%) made by ball milling. According to the weight ratio of quartz glass: grinding ball: water, the prop...

Embodiment 2

[0054] 1. Ingredients

[0055] The matrix material is a mixture of quartz glass powder and silica porous material. Quartz glass powder accounts for 80% of the matrix material, silica porous material accounts for 20% of the matrix material, and the mineralizer material is mullite (3Al 2 o 3 .2 SiO, particle size ≤ 53 μm, GB / T12215-90, produced by Meihekou), the core material is composed of matrix material and mineralizer material, and the proportioning is calculated by weight percentage: 85% of matrix material and 15% of mineralizer material. The plasticizer material is a mixture of 97% white paraffin (GB254-87, 50~60#) and 3% high-pressure polyethylene (HG2-299-65, A grade) by weight percentage, and the plasticizer material accounts for the base material and mineral 18% of the total weight of the agent material.

[0056] Quartz glass powder is made of quartz glass balls (JC177-81, SiO 2 ≥99.97%) made by ball milling. According to the weight ratio of quartz glass: grinding ...

Embodiment 3

[0076] 1. Ingredients

[0077] The matrix material is a mixture of quartz glass powder and silica porous material, the quartz glass powder accounts for 70% of the matrix material, the silica porous material accounts for 30% of the matrix material, and the mineralizer material is mullite (3Al 2 o 3 .2 SiO, particle size ≤ 53 μm, GB / T12215-90, produced by Meihekou), the core material is composed of matrix material and mineralizer material, and the proportioning is calculated by weight percentage: 80% of matrix material and 20% of mineralizer material. The plasticizer material is a mixture of 97% white paraffin (GB254-87, 50~60#) and 3% high-pressure polyethylene (HG2-299-65, A grade) by weight percentage, and the plasticizer material accounts for the base material and mineral 15% of the total weight of the agent material.

[0078] Quartz glass powder is made of quartz glass balls (JC177-81, SiO 2 ≥99.97%) made by ball milling. According to the weight ratio of quartz glass: g...

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Abstract

Disclosed is a hollow cast ceramic core, which comprises substrate material 80-85% and Mullite 20-15%, wherein the substrate material comprises quartz glass powder 60-80% and silica dioxide porous material 40-20%. Its manufacturing process consists of proportioning, mixing the core material with plasticity agent and right amount of oleinic acid, melting, mixing, press forming, sintering, and carrying out high temperature reinforcement and low temperature reinforcement treatment.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a hollow casting ceramic core and a preparation method thereof. Background technique [0002] The high-pressure turbine blade is an important part of the engine. In order to continuously increase the gas temperature in front of the turbine, countries around the world have developed from the manufacture of solid blades to hollow blades, from polycrystalline blades to the current single crystal blades. The purpose is to continuously improve the overall performance of the engine. . However, limited by the melting point of the metal, it is close to the limit if the alloy material wants to increase the temperature bearing capacity of the blade. Therefore, continuously improving the cooling structure of the blade and improving the cooling effect have become the goals pursued by the designers and manufacturers of turbine blades. In recent years, GE, Allison, and PW...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/64B28B3/00
Inventor 冯文刚孙革丛健张世东戴琳邹建波司连有
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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