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Method for preparing three-component composite steel pipe

A composite steel pipe and steel pipe technology, which is applied in pipeline protection, mechanical equipment, pipeline anticorrosion/rust protection, etc., can solve the problems of short life of pipeline, limited service life of materials, high secondary cost of maintenance, etc.

Inactive Publication Date: 2003-03-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the functional limitations of the material itself, it often only has a single performance of wear resistance or corrosion resistance. Currently, these materials are used in petrochemical, chemical, electric power, coal, pharmaceutical, papermaking, printing, metallurgy, building materials, marine and other departments. Engineering components made of materials are often corroded by environmental media such as various chemical corrosive media, corrosive gases, and sea water, especially at high operating temperatures, accompanied by the coexistence of corrosion and wear. The service life is extremely limited, and the amount of maintenance and secondary costs incurred during use are large
How to effectively solve the problem of short service life of pipelines under complex working conditions such as high operating temperature, corrosion and wear, wear and scaling, and heavy anti-corrosion is very urgent to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The straight tube of DN30×300 ternary composite tube was prepared by vacuum centrifugation. A steel pipe with an outer diameter of φ48, a wall thickness of 4mm, and a length of 300mm is selected, and has been derusted, clamped, and sealed at both ends. The mixed powder is composed of 23% aluminum powder, 20% boric acid, 20% titanium dioxide, 16% iron powder, 6% silicon oxide, 4% alumina powder, 8% zirconia powder, and 4% toughening alloy elements. 300g was added to the tube. After the high temperature self-propagating centrifugal reaction casting at 1900℃, the centrifugal casting speed is 1800r / min, and a layer of uniform thickness about 3mm thick TiB with high wear resistance is fired on the inner wall of the steel pipe. 2 / Al 2 o 3 Composite cermet straight tube. Install and weld PN16 and DN40 flanges at both ends, clean the scum and dust in the metal-ceramic composite steel pipe, install the cover, and add 180g of compounded epoxy-based composite blended resin (t...

Embodiment 2

[0020] The DN300×3000 ternary compound straight tube was prepared by centrifugation. A steel pipe with an outer diameter of φ325, a wall thickness of 8mm, and a length of 3000mm is selected, and the formula is composed of 22% aluminum powder, 66% iron oxide powder, 2% alumina powder, 9% zirconia powder, and 1% toughening alloy elements. Add 28kg of mixed powder into the tube. High-temperature self-propagating centrifugal reaction casting, the centrifugal casting speed is 800r / min, and a cermet layer with a uniform thickness of about 3mm is fired on the inner wall of the steel pipe. According to the size of the imitation, use the plasma arc cutting machine to cut the ceramic composite straight pipe into a number of blanks required for the shrimp curved pipe, and then use the welding method to assemble and weld the shrimp curved pipe, and install and weld PN10 and DN300 flanges at both ends, and clean them. The scum and dust in the φ325 metal-ceramic composite steel pipe are pu...

Embodiment 3

[0022] The DN600×6000 ternary composite tube was prepared by centrifugation. Choose a steel pipe with an outer diameter of φ630, a wall thickness of 10mm, and a length of 2000mm. The formula is 16% of aluminum powder, 48% of iron oxide powder, 14% of boric acid, 14% of titanium dioxide, 2% of silicon oxide, 2% of alumina powder, and zirconia powder. Add 65 kg of mixed powder consisting of 2%, 2.5% toughening alloy elements, etc. into the tube. 1750 ℃ ​​high temperature self-propagating centrifugal reaction casting, the centrifugal casting speed is 500r / min, and a layer of cermet layer with uniform thickness of about 4mm is fired on the inner wall of the steel pipe. Prepare three metal-ceramic composite steel pipes by the same method, and connect them to a length of 6000mm. 20kg through compounding unsaturated polyester base composite resin (compounding ratio is: unsaturated resin 26%, methyl ethyl ketone peroxide 0.8%, drier 0.3%, silicon dioxide 5.2%, talcum powder 2.6%, pre...

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Abstract

The present invention relates to a new-type three-component composite steel pipe and its production method, which comprises three layers of material of metal, ceramics and macromolecular polymer resin. Its external layer metal is used as load-bearing structure component, its middle layer ceramic material is used as wear-resistant component and the macromolecular polymer resin applied on inner wall is a material with a certain anti-corrosive scale-inhibiting function. When it is prepared, the ceramic material is added into the steel pipe, and formed into a ceramic layer by utilizing self-spreading high-temp. synthesis centrifugal casting technique, then the polymer resin is added into the pipe, then the ceramic layer is impregnated with resin and solidified.

Description

technical field [0001] The invention relates to the key technologies for preparing ternary composite steel pipes, which are the preparation technology of ceramic composite steel pipes, the reaction impregnation technology of organic / inorganic blended resin and the preparation technology of ternary composite materials. Background technique [0002] Anti-wear and corrosion-resistant pipelines are widely used in electric power, chemical industry, petroleum, petrochemical, metallurgy, nuclear power, coal, mining, construction and other industries. In particular, there is a considerable demand for various pipelines suitable for operation under the conditions of corrosion and wear or wear and scaling, such as transporting corrosive liquids containing ash particles and waste fluids containing particles. However, the problem of material corrosion is a worldwide problem. In the application of engineering components, the main forms of material failure are corrosion, wear and fracture,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/02B22D19/08B22D19/16F16L58/10F16L58/14
Inventor 杨振国梅彤金忠
Owner FUDAN UNIV
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