Ceramic core for hollow casting

A ceramic core and casting technology, which is applied in the field of precision casting, can solve problems such as core collapse, and achieve the effects of low core breaking rate, good dimensional accuracy, and high temperature thermal stability

Inactive Publication Date: 2014-10-01
WUHU ZHEXIN NEW ENERGY
View PDF4 Cites 1 Cited by
  • 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 collap

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] A hollow casting ceramic core, which is characterized in that it is composed of the following raw materials in weight percentage:

[0031] 21% by weight of mineralizer, 20% by weight of plasticizer, 0.3% by weight of cerium oxide, 0.2% by weight of oleic acid, and the balance is rare earth coated composite powder;

[0032] The mineralizer is titanium dioxide, and the fineness is 50-200 μm;

[0033] The plasticizer is composed of the following raw materials in parts by weight:

[0034] Paraffin 90, propolis 3, terpene resin 4, polyethylene oxide 1, silane coupling agent KH550 0.2;

[0035] Heat and soften the 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;

[0036] The preparation method of the rare earth coating composite includes the following steps:

[0037] (1) Choose silicon dioxide with a fineness of 70-100μm, polyethylene powder wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a ceramic core for a hollow casting. The ceramic core is characterized by comprising the following raw materials by weight percent: 16%-21% of a mineralizer, 15%-20% of a plasticizer, 0.2%-0.3% of cerium oxide, 0.1%-0.2% of oleic acid and the balance of rare earth-coated composite powder. The ceramic core is low in core breaking rate, free of cracks, low in shrinkage rate, high in high-temperature strength, good in high-temperature thermal stability and high in size precision, is capable of manufacturing thin-wall castings with complicated cavities, and is especially suitable for manufacturing high-pressure turbine blades.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a hollow casting 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, 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 reaction...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/14C04B35/10C04B35/628
Inventor 高博王伟姜银珠赵夫涛
Owner WUHU ZHEXIN NEW ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap