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Gradient porous ceramic core and preparation method thereof

A ceramic core and gradient porous technology, which is applied in the preparation of gradient porous ceramic cores and the field of gradient porous ceramic cores, can solve the problems of low removal efficiency and production efficiency, low core removal efficiency and long removal time. , to achieve the effect of facilitating promotion, improving compactness and weight ratio, and low core formation rate

Active Publication Date: 2021-01-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a gradient porous ceramic core, which solves the problems of long removal time and low removal efficiency of the ceramic core in the prior art
[0007] Another object of the present invention is to provide a preparation method for this kind of gradient porous ceramic core, which solves the problems of low removal efficiency and production efficiency in the preparation of ceramic cores in the prior art

Method used

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  • Gradient porous ceramic core and preparation method thereof

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preparation example Construction

[0027] The preparation method of the gradient porous ceramic core of the present invention is implemented according to the following steps:

[0028] Preparatory steps: Weigh each component according to mass percentage, among them, quartz glass 60%-70%; zircon 15%-20%; white paraffin 10%-15%; diethyl phthalate 1%-2% ; fly ash floating beads 3%-30%; foam plastic particles 5%-10%; beeswax 1%-2%; polyethylene 0.05%-1%; oleic acid 0.05%-1%; total 100%; from quartz Separate 10% of the total amount of glass to prepare square fused silica, separate 10% to prepare refractory materials, and prepare quartz glass powder from the remaining quartz glass;

[0029] Step 1: Prepare thermoplastic ceramic slurry,

[0030] 1.1) Put white paraffin, diethyl phthalate, beeswax, and polyethylene into a blender, heat up to 120-150°C, and wait for it to completely melt to obtain a "wax core" for putting into the ceramic core As the "wax core" in the inner layer of the ceramic core;

[0031] 1.2) Usi...

Embodiment 1

[0039] Preparatory steps: weigh the following components according to mass percentage: 60% of quartz glass; 15% of zircon; 12% of white paraffin; 1% of diethyl phthalate; 8% of fly ash floating beads; 2% of foamed plastic particles , beeswax 1.9%; polyethylene 0.05%; oleic acid 0.05%; total 100%. Separate 10% from the total amount of quartz glass to prepare square fused silica, separate 10% to prepare refractory materials, and prepare quartz glass powder from the remaining quartz glass;

[0040] Step 1: Prepare thermoplastic ceramic slurry,

[0041] 1.1) Put white paraffin, diethyl phthalate, beeswax, and polyethylene into a blender, heat up to 120°C, and wait until it is completely melted to obtain a "wax core", which is used to put inside the ceramic core as a ceramic The "wax core" in the inner layer of the core;

[0042] 1.2) Using quartz glass powder and zircon powder with different particle sizes, put the three raw materials of quartz glass powder, zircon powder, and s...

Embodiment 2

[0048] Preparatory step: weigh the following components according to mass percentage: 65% of quartz glass; 10% of zircon; 10% of white paraffin; 1.8% of diethyl phthalate; 7% of fly ash floating beads; 5% of foamed plastic particles , beeswax 1%; polyethylene 0.1%; oleic acid 0.1%; total 100%. Separate 10% from the total amount of quartz glass to prepare square fused silica, separate 10% to prepare refractory materials, and prepare quartz glass powder from the remaining quartz glass;

[0049] Step 1: Prepare thermoplastic ceramic slurry,

[0050] 1.1) Put white paraffin, diethyl phthalate, beeswax, and polyethylene into a blender, heat up to 150°C, and wait until it is completely melted to obtain a "wax core", which is used to put inside the ceramic core as a ceramic The "wax core" in the inner layer of the core;

[0051] 1.2) Use quartz glass powder and zircon powder with different particle sizes, put the three raw materials of quartz glass powder, zircon powder and square ...

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Abstract

The invention discloses a gradient porous ceramic core which is composed of the following components in percentage by mass: 60-70% of quartz glass; 15%-20% of zircon; 10%-15% of white paraffin; 1%-2%of diethyl phthalate; 3%-30% of fly ash floating beads; 5%-10% of foamed plastic particles; 1%-2% of beewax; 0.05%-1% of polyethylene; 0.05%-1% of oleic acid; total 100%. The invention also disclosesa preparation method of the gradient porous ceramic core. The preparation method comprises the following steps: a preparation step: weighing the components in percentage by mass; 1, preparing thermoplastic ceramic slurry; 2, carrying out hot-press injection to obtain a molded ceramic core blank; and 3, heating, curing and molding the mold to obtain the gradient porous ceramic core. The preparationmethod provided by the invention solves the problems of long removal time and low core removal efficiency of the ceramic core.

Description

technical field [0001] The invention belongs to the technical field of precision casting, and relates to a gradient porous ceramic core, and also relates to a preparation method of the gradient porous ceramic core. Background technique [0002] With the rapid development of aviation, aerospace and industrial gas turbines, the operating temperature of the gas in the turbine engine continues to increase, so it is required to continuously increase the high temperature resistance of the turbine blades. In view of this goal, the structure of superalloy turbine blades has gradually changed from solid to hollow to adapt to the application of air cooling technology. Investment casting superalloys is one of the main technologies for manufacturing turbine gas blades, and the premise of this technology is to prepare ceramic cores and shells with good performance. [0003] At present, expensive high-temperature alloys are generally used for investment casting in the production of high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B35/14C04B35/622B22C9/10
CPCC04B38/08C04B35/14C04B35/622B22C9/101C04B2235/3248C04B2235/5427C04B2235/6022C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/75C04B38/067
Inventor 屈银虎王钰凡高浩斐张红何炫张学硕
Owner XI'AN POLYTECHNIC UNIVERSITY
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