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A rare earth-coated quartz glass-based ceramic core

A rare earth coating, quartz glass technology, applied in the field of precision casting, can solve problems such as core collapse, and achieve the effects of controlling deformability, avoiding cracks and improving compatibility

Active Publication Date: 2015-10-21
WUHU ZHEXIN NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cores prepared by the above patents undergo a hydration reaction when exposed to water, causing the cores to collapse. Therefore, the above cores are difficult to be practically applied in the field of titanium alloy precision casting

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] A rare earth-coated quartz glass-based ceramic core is characterized in that it is composed of the following raw materials in weight percentage:

[0032] 13wt% mineralizer, 23wt% plasticizer, 3wt% sodium aluminate, 1wt% borax, 0.4wt% polyvinyl alcohol, and the rest is rare earth coated quartz glass powder;

[0033] Described mineralizer is aluminum oxide;

[0034] Described plasticizer is made up of the raw material of following weight part:

[0035] Paraffin wax 90, propolis 3, terpene resin 5, polyethylene oxide 2, silane coupling agent KH550 0.2;

[0036] Heat the above-mentioned terpene resin to soften, add polyethylene oxide, stir evenly, add the remaining raw materials, stir and disperse at 800 rpm for 6 minutes, cool and discharge to obtain the plasticizer;

[0037] The preparation method of the rare earth-coated quartz glass comprises the following steps:

[0038] (1) Select quartz glass powder with a particle size of 60-150 μm;

[0039] (2) Add sodium carbo...

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Abstract

The invention discloses a rare earth-coated quartz glass based ceramic core which is characterized by comprising the following raw materials by weight percent: 10%-13% of a mineralizer, 15%-23% of a plasticizer, 3%-4% of sodium aluminate, 1%-2% of borax, 0.2%-0.4% of polyvinyl alcohol and the balance of rare earth-coated quartz glass powder. According to the ceramic core, quartz glass is processed by using zinc stearate in advance, so that the stability of the core can be improved and cracks are avoided; part of the powder is preprocessed by using sodium aluminate and borax firstly before a sintering process, so that the compatibility among materials can be improved and the deformation of the core is effectively controlled.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a rare earth-coated quartz glass-based ceramic core. Background technique [0002] The complex inner cavity of the alloy casting is mainly formed by using a prefabricated ceramic core, and it is removed after the casting is cast. The technological process is as follows: preparation of pottery core, preparation of wax mold containing pottery core, shell making, shell dewaxing and roasting, alloy casting, and core removal. As we all know, with the development of large aircraft projects and various new engine development projects in my country, higher requirements are put forward for the shape, structure and performance of titanium alloy precision castings. [0003] At present, quartz glass and silicon oxide-based ceramic cores, which have been widely studied, are difficult to apply to the field of titanium alloy precision casting because the core materials do not have g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/63C04B35/14C04B35/622
Inventor 姜银珠高博王伟赵夫涛
Owner WUHU ZHEXIN NEW ENERGY
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