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A ceramic core for water pump impeller

A ceramic core and water pump impeller technology, which is applied in the field of precision casting, can solve problems such as core collapse, and achieve the effects of convenient core removal, enhanced fire resistance, and good melting point

Active Publication Date: 2016-01-20
浙江振兴阿祥集团有限公司
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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
Comparison scheme
Effect test

Embodiment 1

[0028] A ceramic core for a water pump impeller is characterized in that it is composed of the following raw materials in weight percentage:

[0029] 20wt% mineralizer, 18wt% plasticizer, 2wt% lanthanum oxide, 2wt% glass fiber, 0.2wt% stearic acid, and the balance is rare earth coated composite powder;

[0030] The mineralizer is zirconia, and the fineness is 50-200 μm;

[0031] Described plasticizer is made up of the raw material of following weight part:

[0032] Paraffin wax 90, propolis 3, terpene resin 5, polyethylene oxide 2, silane coupling agent KH5500.2;

[0033] Heat the above-mentioned terpene resin to soften, add polyethylene oxide, stir evenly, add the remaining raw materials, stir and disperse at 600-800 rpm for 4-6 minutes, cool and discharge to obtain the plasticizer;

[0034] The preparation method of the rare earth coating composite comprises the following steps:

[0035] (1) Mix titanium carbide and boron nitride, ball mill, calcinate at 1000°C for 2 hour...

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Abstract

The invention discloses a ceramic core for a water pump impeller. The ceramic core is characterized by consisting of the following raw materials in percentage by weight: 14-20% of mineralizer, 12-18% of plasticizer, 1-2% of lanthanum oxide, 2-3% of glass fiber, 0.1-0.2% of stearic acid and the balance of rare earth-coated composite powder. In the ceramic core disclosed by the invention, the added titanium carbide has good melting point and calcination strength and can enhance the fire resistance of the core and effectively avoid the casting defects such as sand adhesion in an impeller casting process; and moreover, the titanium carbide can be dissolved in nitric acid and hydrofluoric acid, and the core is convenient to remove.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a ceramic core for a water pump impeller. 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, silicon 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 r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/583C04B35/628
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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