Preparation method and device of high-temperature-resistant ceramic coating on inner wall of small-caliber special-shaped metal pipe

A technology for high-temperature-resistant ceramics and special-shaped metals, which is applied in the coating process and coating of metal materials to achieve the effects of reducing working temperature, increasing safety, and avoiding pollution

Active Publication Date: 2015-06-10
LIAONING SILICATE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the related technologies of bent pipes and special-shaped pipes with a diameter less than 10mm.

Method used

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  • Preparation method and device of high-temperature-resistant ceramic coating on inner wall of small-caliber special-shaped metal pipe
  • Preparation method and device of high-temperature-resistant ceramic coating on inner wall of small-caliber special-shaped metal pipe
  • Preparation method and device of high-temperature-resistant ceramic coating on inner wall of small-caliber special-shaped metal pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The preparation method of the present invention: take by weight 30 parts of silicate binder, 10 parts of titanium dioxide, 10 parts of aluminum oxide, 30 parts of zirconia, add 15 parts of water and stir and mix; then add 5 parts of organic additives, After ball milling and mixing for 4 hours, a high temperature resistant ceramic coating was obtained.

[0024] The diameter is 10mm, the length is 350mm, and the shape is irregular. The material is GH3030 superalloy pipe fittings, which are cleaned by abrasive flow and coarsening, and then coated. Uniform surface drying for 2 hours; heat treatment at 700°C for 8 hours. Then use 30 parts of sealing agent to seal the holes, and finally obtain a high-temperature-resistant ceramic coating on the inner wall of the small-diameter special-shaped metal pipe with a thickness of 0.5 mm.

Embodiment 2

[0026] Weigh 40 parts of silicate binder, 20 parts of titanium dioxide, 10 parts of alumina, and 10 parts of zirconia, add 10 parts of water and stir and mix; then add 10 parts of organic additives, and ball mill and mix for 6 hours to obtain a high-temperature resistant ceramic coating.

[0027] The diameter is 8mm, the length is 450mm, the shape is irregular, the material is GH3030 superalloy pipe fittings, and the coating is carried out after cleaning with abrasive grain flow and roughening. Uniform surface drying for 6 hours; heat treatment at 900°C for 6 hours. Then use 15 parts of sealing agent to seal the holes, and finally obtain a high-temperature-resistant ceramic coating on the inner wall of the small-diameter special-shaped metal pipe with a thickness of 0.3 mm.

[0028] The self-designed grouting equipment used in the present invention is shown in the attached Figure 1-3 . The equipment includes a frame 10, the upper part of the frame 10 is provided with a pres...

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Abstract

The invention discloses a preparation method of a high-temperature-resistant ceramic coating on the inner wall of a small-caliber special-shaped metal pipe. The method is mainly used for preparing the coating on the inner wall of a pipe fitting with pipe diameter of less than 15mm, length of less than 500mm and irregular shape. The main preparation process is as follows: 1) preparing paint: the paint contains a silicate adhesive, a high temperature-resistant ceramic material, a solvent and an organic additive; 2) preparing the coating: the preparation of the coating adopts a grouting method, and in order to ensure the uniformity of the developed coating, a grouting device and a coat homogenization device are self-designed; and 3) drying and sealing treatment of the coating: the drying and thermal treatment are performed on the coating under a stipulated system, and then a self-made hole sealing agent is adopted for performing hole sealing treatment on the prepared ceramic high-temperature-resistant coating. The uniform and dense coating capable of working in a high temperature environment of 1200 DEG C is finally obtained.

Description

technical field [0001] The invention belongs to the field of coating preparation, and in particular relates to a preparation method of a high-temperature-resistant ceramic coating on the inner wall of a small-caliber special-shaped metal pipe with ceramic materials as the main body. Background technique [0002] With the development of science and technology, various gas engines and internal combustion engines are increasingly miniaturized. The internal conduits are also increasingly miniaturized. Generally, the inner diameter of the pipe fittings is less than 15mm, the length is less than 500mm, and the shape is irregular. The temperature of the fluid (such as gas) passing through the pipe fittings can reach 1000°C, and it has strong high-temperature corrosion. The inner wall of the currently used pipe fittings is exposed, and the inner wall is in direct contact with the high-temperature fluid during operation. During use, the high-temperature fluid passes through the pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00C04B35/49C04B35/16C04B35/622
Inventor 周岩韩绍娟许壮志薛健王玉现
Owner LIAONING SILICATE RES INST
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