Manufacturing method for ceramic-lined composite steel pipe

A technology of composite steel pipe and ceramic lining, applied in coating, metal material coating technology and other directions, can solve the problems of erosion, wear and corrosion damage, high price of special alloy steel pipe, affecting service life, etc., to achieve low cost and improve application. The effect of high value and production efficiency

Inactive Publication Date: 2012-06-20
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Fluid pipeline transportation is widely used in metallurgy, coal, petroleum, chemical and other industries, but its severe scouring wear, corrosion damage and high temperature and other extremely harsh working environment characteristics make ordinary steel pipes unable to meet the use requirements, and special alloy steel pipes are expensive and expensive. It is impossible to solve the problem fundamentally
[0003] In recent years, ceramic-lined composite steel pipe has attracted much attention due to its low engineering cost and good wear resistance, heat resistance and corrosion resistance. Peeling phenomenon, affecting its service life

Method used

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  • Manufacturing method for ceramic-lined composite steel pipe
  • Manufacturing method for ceramic-lined composite steel pipe
  • Manufacturing method for ceramic-lined composite steel pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Use a Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm, remove the rust on the inner surface of the welded pipe 2, and seal the bottom end of the steel pipe with a zinc sheet 4; 2 o 3 →Al 2 o 3 +2Fe+836kJ / mol, Fe 2 o 3 The stoichiometric ratio of Al and Al is 1:2.96 by weight, and the particle size is 200 mesh analytically pure powder. The additive rare earth oxide Y 2 o 3 / La 2 o 3 with SiO 2 0.5% by weight: 2% added to thermite 3, the filler density is 1.6g cm -3 , the weight ratio of each reagent is Al:Fe 2 o 3 : SiO 2 : Y 2 o 3 / La 2 o 3 =73.5%:24%:2%:0.5%.

[0032] Ignite the tungsten wire 1, the reaction is rapid and complete, the steel pipe 2 turns red instantly, a small amount of material is splashed, the coating is uniform, the resulting ceramic layer has no pores, the surface is fine and smooth, the texture is good, the quality is grade A, and the thickness of the dense ceramic layer is formed 1.6-2mm.

Embodiment approach 2

[0034] Use a Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm, remove the rust on the inner surface of the welded pipe 2, and seal the bottom end of the steel pipe with a zinc sheet 4; 2 o 3 →Al 2 o 3 +2Fe+836kJ / mol, Fe 2 o 3 The stoichiometric ratio of Al and Al is 2.96:1 by weight, and the particle size is 200 mesh analytically pure powder. The additive rare earth oxide Y 2 o 3 / La 2 o 3 with SiO 2 According to the ratio of 1%: 2%, it is added to thermite 3, and the filler density is 1.6g cm -3 , the weight ratio of each reagent is Al:Fe 2 o 3 : SiO 2 : Y 2 o 3 / La 2 o 3 =73%:24%:2%:1%.

[0035] Ignite the tungsten wire 1, the reaction is more violent, the steel pipe 2 turns red instantly, there is a certain amount of material splashing, the coating has no obvious pores, the surface is smooth, the texture is good, but the crystal grains are coarse, the quality is B grade, and the thickness of the dense ceramic layer is formed 1.5-1.8mm.

Embodiment approach 3

[0037] Use a Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm, remove the rust on the inner surface of the welded pipe 2, and seal the bottom end of the steel pipe with a zinc sheet 4; 2 o 3 →Al 2 o 3 +2Fe+836kJ / mol, Fe 2 o3 The chemical weight ratio of Al and Al is 2.96:1, and the particle size is 200 mesh analysis pure powder. The additive rare earth oxide Y 2 o 3 / La 2 o 3 with SiO 2 According to the ratio of 1%: 0%, it is added to thermite 3, and the packing density is 1.6g cm -3 , the weight ratio of each reagent is Al:Fe 2 o 3 : SiO 2 : Y 2 o 3 / La 2 o 3 =74%:25%:0%:1%.

[0038] When the tungsten wire 1 is ignited, the reaction proceeds rapidly, sparks are scattered, a large amount of material is ejected, and the welded pipe 2 turns red rapidly. After the reaction, only a thin ceramic layer of about 1mm is attached to the surface of the lower part of the welded pipe 2, while the upper part is not covered with a ceramic layer, and the welded pipe 2 can...

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Abstract

The invention relates to a manufacturing method for a ceramic-lined composite steel pipe, and belongs to the field of pipeline transportation materials. The invention provides an additive, wherein the additive consists of rare earth oxide Y2O3 or La2O3 and silicon dioxide SiO2; the rare earth oxide Y2O3 or La2O3 and the silicon dioxide SiO2 are added into a thermit according to a proportion; the additive accounts for 1-3 percent of the total weight of reaction materials; and after drying, the ceramic-lined composite steel pipe is synthesized by a self-propagating process. The method has the advantages of increasing the compactness of a ceramic layer, improving the hardness of the composite steel pipe, enhancing the wear resistance, improving the corrosion resistance and prolonging the service life, along with fine and smooth inner surface and good texture. The overall performance of the ceramic-lined composite steel pipe is improved, so that the ceramic-lined composite steel pipe becomes an ideal wear-resistant pipeline transportation material; meanwhile, the rare earth resource advantage of China is brought into full play; and the application value of rare earth in the ceramic-lined composite steel pipe is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a ceramic-lined composite steel pipe, which belongs to the field of pipeline transportation materials. Background technique [0002] Fluid pipeline transportation is widely used in metallurgy, coal, petroleum, chemical and other industries, but its severe scouring wear, corrosion damage and high temperature and other extremely harsh working environment characteristics make ordinary steel pipes unable to meet the use requirements, and special alloy steel pipes are expensive and expensive. It is impossible to fundamentally solve the problem. [0003] In recent years, ceramic-lined composite steel pipe has attracted much attention due to its low engineering cost and good wear resistance, heat resistance and corrosion resistance. Peeling phenomenon, affecting its service life. For this reason, people began to try various additives to improve the density and improve its overall performance. So far, the only...

Claims

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Application Information

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IPC IPC(8): C23C24/10C04B35/10C04B35/65
Inventor 包喜荣陈林田忠良
Owner INNER MONGOLIA UNIV OF SCI & TECH
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