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Multi-layered composite tube with ceramic lining and preparation method thereof

A multi-layer ceramic and ceramic lining technology, applied in the field of gradient composite materials, can solve the problems of large differences in physical and chemical properties, affecting the mechanical properties and service life of composite pipes, etc., to improve mechanical properties, reduce thermal stress, The effect of high abrasion resistance

Inactive Publication Date: 2008-11-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in physical and chemical properties between the ceramic layer and the iron metal layer, only a mechanically bonded structure can be formed, which affects the mechanical properties and service life of the composite pipe

Method used

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  • Multi-layered composite tube with ceramic lining and preparation method thereof
  • Multi-layered composite tube with ceramic lining and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] 20 # Steel pipe, φ52mm, wall thickness 5mm, length 1000mm, containing 313 grams of mixed powder, the proportion of the mixed powder is: aluminum powder 23%, nickel powder 15%, titanium powder 15%, boron carbide 10%, iron oxide 25%, chromium trioxide 5%, sodium borate 7%, powder particle size 15-40μm. When the steel pipe rotation speed reaches 2000 rpm, the powder is ignited with an igniter and the powder forms a self-sustained combustion reaction, and the reaction time is 15 seconds. After the reaction is completed, the cooled composite pipe is subjected to an annealing heat treatment at 350° C.×2 hours. The compressive strength of the composite pipe is 248MPa, and the shear strength of the ceramic lining is 55MPa.

Embodiment approach 2

[0025] Cr-Mo heat-resistant steel pipe, φ85mm, wall thickness 5mm, length 3000mm, containing 2100 grams of mixed powder, the proportion of mixed powder: aluminum powder 25%, nickel powder 10%, titanium powder 10%, boron carbide 5% , Iron trioxide 25%, chromium trioxide 15%, sodium borate 10%, powder particle size is 4-10μm. When the rotating speed of the steel pipe reaches 1700rpm, the powder is ignited with an igniter and the powder forms a self-sustained combustion reaction, the reaction time is 28 seconds. After the reaction is completed, the cooled composite pipe is annealed and heat treated at 300°C for 1 hour. The compressive strength of the composite pipe is 265MPa, and the shear strength of the ceramic lining is 45MPa.

Embodiment approach 3

[0027] 20 # Steel pipe, φ70mm, wall thickness 6.5mm, length 1000mm, 400 grams of mixed powder inside, the proportion of mixed powder is: aluminum powder 22%, nickel powder 15%, titanium powder 10%, boron carbide 10%, two oxides Iron 30%, chromium trioxide 8%, sodium borate 5%, powder particle size is 15-40μm. When the rotation speed of the steel pipe reaches 1500rpm, the powder is ignited with an igniter and the powder forms a self-sustained combustion reaction. The reaction time is 18 seconds. After the reaction is completed, the cooled composite pipe is subjected to an annealing heat treatment at 350° C.×2 hours. The compressive strength of the composite pipe is 265MPa, and the shear strength of the ceramic lining is 40MPa.

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Abstract

The invention relates to a multilayer ceramic lining composite tube and its preparation method, is a composite steel tube taking intermetallic compound and titanium compound as ceramic lining, which belongs to the technique field of gradient composite material. The invention conqueres the disadvantage of bad mechanical combine construction and mechanics property of ceramic coating and metal coating, when ceramic lining composite tube is prepared with self-spread centrifugal burning method. The invention is characterized in that filling mixture of pulverous reaction raw material in the steel tube and fixing it on the rotary mechanism, When rotate speed is at 1500-2000rpm, igniting reaction raw material with ignition device and making them form high-heat self-spread reaction; the products synthesized form layered lining layer on the inwall of the steel tube according to different density; the construction of the lining layer synthesized is ordinally steel tube, intermetallic compound, titanium compound ceramic, alumina ceramic along radial. The bonding strength, mechanics property, abrasion resistance and corrosion resistance had enhanced remarkably in this invention.

Description

Technical field [0001] The multilayer ceramic-lined composite pipe and the preparation method thereof of the present invention are a ceramic-lined composite pipe with intermetallic compounds and titanium compounds as transition layers and a preparation method thereof, belonging to the technical field of gradient composite materials. Background technique [0002] The preparation method of a type of ceramic-lined composite pipe developed in recent years is to use the technology of self-propagating reaction combustion and centrifugal force to form a ceramic-lined composite pipe of ceramic layer-iron metal layer-steel pipe. The raw materials of the combustion agent are iron oxide and aluminum powder Mainly. Due to the large difference in physical and chemical properties between the ceramic layer and the iron metal layer, only a mechanically bonded structure can be formed, which affects the mechanical properties and service life of the composite pipe. Summary of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/64
Inventor 孟庆森陈少平张浩
Owner TAIYUAN UNIV OF TECH
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