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A method for manufacturing a large-diameter wear-resistant and corrosion-resistant ternary composite pipe

A ternary composite and manufacturing method technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of perforation of steel pipes, deformation of pipe straightness and roundness, etc., to achieve small deformation, tight bonding and smoothness smooth effect

Inactive Publication Date: 2017-10-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the production process of large-diameter pipes, due to the large diameter and relatively thin wall thickness of the steel pipe, the straightness and roundness of the pipe due to the high temperature during the self-propagating high-temperature centrifugal synthesis (SHS) reaction Severe deformation will occur at any temperature, or the steel pipe will be perforated due to local overheating. The wedge ring fixture used in the past for small and medium pipe diameters is no longer suitable for the production of large-diameter ternary composite pipes.

Method used

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  • A method for manufacturing a large-diameter wear-resistant and corrosion-resistant ternary composite pipe
  • A method for manufacturing a large-diameter wear-resistant and corrosion-resistant ternary composite pipe
  • A method for manufacturing a large-diameter wear-resistant and corrosion-resistant ternary composite pipe

Examples

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Effect test

Embodiment 1

[0035] Example 1: This method is used to make DN1000 length 6000 ternary composite pipes (unspecified length units are mm, the same below)

[0036] a. Application of self-propagating high-temperature centrifugal synthesis reaction (SHS) to produce large-diameter ceramic composite steel pipes

[0037] This large-diameter steel pipe is made of steel plate, with an outer diameter of 1020, a wall thickness of 12, and a length of 2000. The butt joint is automatically welded. (Such as Figure 7 ), the steel pipe butt joint is placed at the butt joint gap between the upper and lower casings.

[0038] Install the cover at both ends, the cover is closely attached to the steel pipe, and fixed firmly with bolts.

[0039] Prepare thermite, with the ratio of iron oxide powder 56%, aluminum powder 21%, zirconia powder 8%, titanium oxide powder 4%, silicon oxide powder 3%, aluminum oxide powder 3%, boron oxide 5%, etc. Prepare 137kg of reaction raw materials, mix them evenly, add them int...

Embodiment 2

[0045] Example 2: This method is used to make a ternary composite pipe with a length of DN600 and a length of 4000 (unspecified length units are mm, the same below)

[0046] a. Application of self-propagating high-temperature centrifugal synthesis reaction (SHS) to produce large-diameter ceramic composite steel pipes

[0047] This large-diameter steel pipe is made of steel plate, with an outer diameter of 630mm, a wall thickness of 12mm, and a length of 2000mm. (Such as Figure 7 ), the steel pipe butt joint is placed at the butt joint gap between the upper and lower casings.

[0048] Install the cover at both ends, the cover is closely attached to the steel pipe, and fixed firmly with bolts.

[0049] Prepare thermite, with the ratio of iron oxide powder 56%, aluminum powder 19%, zirconia powder 8%, titanium oxide powder 5%, silicon oxide powder 3%, aluminum oxide powder 4%, boron oxide 5%, etc. Prepare 86kg of reaction raw materials, mix them evenly, add them into a large-...

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Abstract

The invention relates to a manufacturing method of a large-diameter wear-resistant and corrosion-resistant ternary composite pipe. The nominal diameter DN of the ternary composite pipe is 600mm to 1200mm, and the specific steps are: 1. Use the matching wedge-ring clamp or casing wedge-ring clamp on the centrifuge to perform centrifugal rotation on the large-diameter steel pipe; 2. Carry out Self-propagating high temperature centrifugal synthesis reaction (SHS), the reaction product TiB2 / ZrB2-Al2O3 is effectively distributed on the inner surface of the steel pipe; 3. The inner surface is mixed with resin by the centrifugal vacuum impregnation process. The invention uses the matching mold equipment to make the wear-resistant and corrosion-resistant ternary composite layer on the inner surface of the steel pipe, and solves the problem existing in the application of the self-propagating high-temperature centrifugal synthesis technology (SHS) to the production of large-diameter pipes. The large-diameter wear-resistant and corrosion-resistant ternary composite pipe made by the invention has strong interface bonding force between the inner lining composite layer and the outer steel pipe, high mechanical impact resistance, and effectively solves the phenomenon of cracking and falling off of different composite layers due to thermal expansion of different media. , Good wear resistance and corrosion resistance, long service life, and has important engineering value.

Description

technical field [0001] The invention relates to the technical field of composite pipe production, in particular to a kind of composite pipe made of metal, ceramics and polymer through special methods such as self-propagating high-temperature synthesis (SHS for short) and vacuum centrifugal impregnation casting. A method for manufacturing a large-diameter wear-resistant and corrosion-resistant ternary composite pipe. Background technique [0002] my country's economy has developed rapidly in the past ten years, and a series of major construction projects related to energy and environmental protection, such as flue gas desulfurization, coal-to-oil conversion, Sichuan-to-East gas transmission, oil and gas purification, and seawater desalination, are all under implementation. Premature leaks from equipment and piping are frequent due to materials involved in the interaction of corrosive wear and erosion wear. Especially for thermal power plants in coastal areas, due to the eros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/14C23C24/10B29C39/10
Inventor 杨振国梅彤于志强
Owner FUDAN UNIV
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