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Ceramic core for titanium alloy casting

A technology of ceramic core and titanium alloy, which is applied in the field of precision casting, can solve problems such as core collapse, and achieve good core removal performance, good mechanical properties at room temperature, and excellent sintering performance

Active Publication Date: 2015-12-30
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
Comparison scheme
Effect test

Embodiment 1

[0030] A ceramic core for titanium alloy casting, which is made up of the following raw materials in percentage by weight:

[0031] 17wt% mineralizer, 20wt% plasticizer, 0.8wt% oleic acid, 2wt% yttrium oxide, 0.06wt% thorium dioxide, 0.8wt% sodium silicate, and the balance is rare earth coated boron nitride powder;

[0032] The mineralizer is one or two or more of zirconium dioxide, aluminum oxide and titanium dioxide, mixed in any mass ratio;

[0033] Described plasticizer is made up of the raw material of following weight part:

[0034] Paraffin wax 90, propolis 4, silica-alumina gel 6, propylene glycol sebacate polyester 2, aluminum hydroxide powder 3, silane coupling agent KH5500.2;

[0035] 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 remaining raw materials, stir evenly, keep warm at 90°C for 5 minutes, cool and discharge , to obtain the plasticizer;

[0036...

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Abstract

The invention discloses a ceramic core for casting a titanium alloy. The ceramic core is characterized by comprising the following raw materials in percentages by weight: 10-14wt% of a mineralizer, 13-20wt% of a plasticizer, 3-5wt% of aluminum dihydrogen phosphate, 0.5-1wt% of xanthan gum and the balance of rare earth-coated boron nitride powder. The ceramic core disclosed by the invention has the characteristics that the sintering property is excellent, mechanical properties at room temperature are good and the chemical reaction inertia with melt titanium is good, the core removal performance is good, the maximum bending strength at room temperature is 27MPa and the maximum flexural strength at room temperature is 6.5MPa.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a ceramic core for titanium alloy casting. 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 chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/583C04B35/628
Inventor 高博王伟姜银珠赵夫涛
Owner WUHU ZHEXIN NEW ENERGY
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