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An inorganic ceramic core that is easy to core off and collapse

A kind of ceramic core and inorganic technology, applied in the direction of core, casting mold, casting mold composition, etc., can solve the problems of core collapse and other problems, achieve the effect of accelerating core removal, easy collapse, and improving high temperature deflection and strength

Active Publication Date: 2016-04-13
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] An inorganic ceramic core that is easy to take off the core and collapse is characterized in that it is composed of the following raw materials in weight percentage:

[0029] 12wt% of mineralizer, 20wt% of plasticizer, 3wt% of calcium chloride, and the balance is rare earth coated silicon oxide powder;

[0030] The mineralizer is mullite powder with a fineness of 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 4, polyethylene oxide 1, silane coupling agent KH5500.2;

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

[0034] The preparation method of the rare earth coated silicon oxide comprises the following steps:

[0035] (1) Select silicon oxide powder with a particle size of 150 μm;

[0036] (2) Mix sodi...

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PUM

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Abstract

The invention discloses an easily removable and collapsible inorganic ceramic core, which is characterized by being composed of the following raw materials by weight: 7-12wt% of a mineralizing agent, 12-20wt% of a plasticizer, 3-4wt% of calcium chloride, and the balance rare earth coated silicon oxide powder. By adding calcium chloride and rare earth to the core provided by the invention for treatment, the high temperature deflection and strength of a shell can be improved so as to control deformation of the shell under high temperature, thus ensuring acquisition of dimensionally qualified products. Calcium chloride can release heat after encountering water, and is easy to collapse, thus accelerating core removal.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to an inorganic ceramic core which is easy to be removed and collapsed. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/14B22C1/02B22C9/10
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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