Manufacture method of ceramic lining composite square steel tube

A technology of ceramic lining and production method, which is applied in the new field of steel surface coating, can solve the problems of square tubes being easily twisted and deformed, the ceramic coating is easy to fall off, and the thickness of the coating is uneven, so that the production process is less and the synthesis reaction The effect of rapid process and short production cycle

Inactive Publication Date: 2007-02-28
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

③If the test tube is not placed vertically, it can only cause uneven coating thickness for round tubes, while square tubes are easy to twist an

Method used

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  • Manufacture method of ceramic lining composite square steel tube
  • Manufacture method of ceramic lining composite square steel tube
  • Manufacture method of ceramic lining composite square steel tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The substrate is a square steel pipe of 30×30×1.5mm, and the length is 200mm.

[0065] The particle size of Al powder is 200±20 mesh, Fe 2 o 3 Particle size 150-250 mesh, SiO 2 Particle size 200±20 mesh, packing density 1.5~2.0g / cm 3 , the ratio of powder weight to matrix is ​​3.0~5.5g / cm 3 , the ratio of reagents is Al:Fe 2 o 3 : SiO 2 =24.2%:71.8%:4%.

[0066] React at room temperature and cool naturally to produce ceramics with uniform thickness, smooth surface, and a thickness of about 1.5-2.5 mm. The average hardness value is 1200-1400 (HV0.2), and the highest can reach 1415 (HV0.2). The combination of ceramic and metal matrix is ​​firm and not easy to fall off.

Embodiment 2

[0068] The substrate is a square steel pipe of 30×30×1.5mm, and the length is 200mm.

[0069] The particle size of Al powder is 100-200 mesh, Fe 2 o 3 Particle size 100-200 mesh, SiO 2 Particle size 100-200 mesh, CrO 3 Powder particle size 100-200 mesh, filler density 1.5-2.0g / cm 3 , the ratio of powder weight to matrix is ​​3.0~5.5g / cm 3 , the ratio of reagents is Al:Fe 2 o 3 : SiO 2 :CrO 3 =26%:68%:4%:2%.

[0070] React at room temperature and cool naturally to produce ceramics with uniform thickness, smooth surface, and a thickness of about 1.5-2.5 mm. The average hardness value is 1200-1400 (HV0.2), and the highest can reach 1415 (HV0.2). The combination of ceramic and metal matrix is ​​firm and not easy to fall off.

Embodiment 3

[0072] The substrate is 60×60×4mm square steel pipe, the length is 100mm, and the material is Q235.

[0073] The particle size of Al powder is 100-200 mesh, Fe 2 o 3 Particle size 100-200 mesh, SiO 2 Particle size 100-200 mesh, filler density 1.4-1.8g / cm 3 , the ratio of powder weight to matrix is ​​3.0~5.5g / cm 3 , the ratio of reagents is Al:Fe 2 o 3 : SiO 2 =30%:66%:4%.

[0074] In the experiment of preparing a large cross-section ceramic composite square tube, in order to improve the density of the ceramic layer, SiO was added to the thermite 2 , due to its dual effect on coating quality, we determined a reasonable SiO 2 The amount added is 4%. The core is a Φ30mm round steel pipe, which reacts at room temperature and cools naturally. A ceramic composite square tube sample with smooth surface and uniform coating thickness is prepared, which can be used directly; it can also be cut into ceramic composite steel plate, which is a new and effective method for preparin...

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Abstract

The invention discloses a manufacturing method of ceramic lining composite steel pipe, which comprises the following parts: Fe2O3 powder, Al powder, SiO2 powder and CrO3 powder, wherein these materials are blended evenly to generate the product through toasting, allocating, loading, adding core and igniting; certain shaped core material is added in the middle of square pipe, which reduces quality of thermit to control manufacturing cost; the thermit is added directly in the square steel pipe with external radius less than 35mm to ignite.

Description

technical field [0001] The invention relates to a new technical field of steel surface coating, in particular to a production method of a ceramic-lined composite steel pipe. Background technique [0002] The ceramic-lined composite square steel pipe and the manufacturing method thereof utilize the chemical energy inside the reactants to synthesize materials. After the reactants are ignited, the combustion reaction is self-sustaining and generally does not require additional energy. The whole process is extremely simple, low energy consumption, high production efficiency, and high product purity. [0003] The process of producing ceramic coating on ceramic-lined composite square steel pipe: Al powder and Fe with a certain particle size 2 o 3 The powder is prepared in proportion, mixed by a mixer, and put into a tube to make it reach a certain density. The square steel tube is placed vertically, and the upper part of the thermite is ignited. ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/64C04B37/02
Inventor 王凤辉焦安源高兴岐
Owner UNIV OF SCI & TECH LIAONING
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