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 s

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

Example Embodiment

[0030] Implementation mode 1:

[0031] Use Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm to remove rust from the inner surface of welded pipe 2, and seal the bottom end of the steel pipe with zinc sheet 4; according to the thermite reaction 2Al+Fe 2 O 3 →Al 2 O 3 +2Fe+836kJ / mol, Fe 2 O 3 The stoichiometric ratio with Al is 1:2.96 by weight, and the particle size is 200 mesh analytical pure powder. Add the rare earth oxide Y 2 O 3 / La 2 O 3 With SiO 2 Add 0.5%: 2% by weight to the thermite 3, the density of the filler 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] The tungsten wire 1 is ignited, and the reaction is rapid and complete. The steel pipe 2 instantly turns red. The material has a small amount of splashing and the coating is uniform. The ceramic layer produced has no pores, fine and smooth surface, and good texture. The quality is Grade A, and the thickness of the dense ceramic layer is prod...

Example Embodiment

[0033] Implementation mode 2:

[0034] Use Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm to remove rust from the inner surface of welded pipe 2, and seal the bottom end of the steel pipe with zinc sheet 4; according to the thermite reaction 2Al+Fe 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 analytical pure powder. Add the rare earth oxide Y 2 O 3 / La 2 O 3 With SiO 2 Add to the thermite 3 according to the proportion of 1%: 2%, the density of the filler 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] The tungsten wire 1 is ignited, the reaction is 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 grain is coarse, the quality is B grade, and a dense ceramic layer thickness is formed It is...

Example Embodiment

[0036] Implementation mode 3:

[0037] Use Q235 welded pipe 2 with a size of Φ15mm×3.5mm×130mm to remove rust from the inner surface of welded pipe 2, and seal the bottom end of the steel pipe with zinc sheet 4; according to the thermite reaction 2Al+Fe 2 O 3 →Al 2 O 3 +2Fe+836kJ / mol, Fe 2 O 3 The weight ratio of Al Chemical and Al Chemical is 2.96:1, and the particle size is 200 mesh analytical pure powder. Add the rare earth oxide Y 2 O 3 / La 2 O 3 With SiO 2 Add 1%:0% to the thermite 3 according to the ratio, the density of the filler 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 quickly, sparks shoot out, a large amount of materials are ejected, and the welded pipe 2 quickly turns red. After the reaction is over, only a thin ceramic layer of about 1 mm is attached to the surface of the lower part of the welded pipe 2, while the upper part is not at...

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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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