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Nanometer composite ceramic core

A ceramic core and nano-composite technology, which is applied in the field of precision casting, can solve problems such as core collapse, and achieve the effects of small firing shrinkage, constant change, and increased porosity

Active Publication Date: 2014-10-01
浙江振兴阿祥集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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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

[0029] A kind of nanocomposite ceramic core, it is made up of the raw material of following percentage by weight:

[0030] 18wt% mineralizer, 20wt% plasticizer, 3wt% nano-silicon dioxide, 2wt% nano-magnesia, 3wt% microcrystalline wax, and the balance is rare earth-coated nanocomposite powder;

[0031] The mineralizer is composed of zirconium dioxide, calcium oxide, silicon dioxide and other mass ratio mixtures;

[0032] Described plasticizer is made up of the raw material of following weight part:

[0033] Paraffin wax 82, propolis 4, silica-alumina gel 8, propylene glycol sebacate polyester 2, aluminum hydroxide powder 3, silane coupling agent KH550 0.2;

[0034] Heat and melt the above paraffin, add propolis, aluminum hydroxide powder, silane coupling agent KH550, stir and disperse at 400 rpm for 12 minutes, add the rest of the raw materials, stir evenly, keep warm at 90°C for 3-5 minutes, cool Discharge, obtain described plasticizer;

[0035] The preparation method of th...

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Abstract

The invention discloses a nanometer composite ceramic core which is characterized by comprising the following raw materials in percentage by weight: 12%-18% of mineralizing agents, 14%-20% of plasticizing agents, 2%-3% of nanometer silicon dioxide, 1%-2% of nanometer magnesium oxide, 2%-3% of microcrystalline wax and the balance of rare earth coated nanometer composite powder. The nanometer composite ceramic core disclosed by the invention is sufficient in bending strength and small in firing shrinkage rate and can ensure the invariability of a dimension and a shape and effectively enhance the porosity of a core by adopting the raw materials with different fineness, thereby well improving the core stripping property.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a nanocomposite 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, magnesium oxide 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 good chemical reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/583C04B35/622
Inventor 高博王伟姜银珠赵夫涛
Owner 浙江振兴阿祥集团有限公司
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