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Preparation method of high-temperature-resistant corrosion-resistant slag-dredging ceramic coating

A ceramic coating, corrosion-resistant technology, applied in the coating, superimposed layer plating, metal material coating process and other directions, can solve the uncontrollable surface morphology of metal substrate, reduce the service life of ceramic coating, ceramic coating failure, etc.

Active Publication Date: 2021-01-05
RAOPING YUEXING COPPER PROCESSING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the ceramic coating is applied to the blast furnace tuyere, the slag liquid will splash on the surface of the ceramic coating and stick to the surface of the ceramic coating, which will aggravate the failure of the ceramic coating, such as image 3 As shown, the metal substrate is corroded, reducing the service life of the ceramic coating, and the surface morphology of the eroded metal substrate is uncontrollable, and the surface structure of the metal substrate cannot be improved.

Method used

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  • Preparation method of high-temperature-resistant corrosion-resistant slag-dredging ceramic coating
  • Preparation method of high-temperature-resistant corrosion-resistant slag-dredging ceramic coating
  • Preparation method of high-temperature-resistant corrosion-resistant slag-dredging ceramic coating

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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, in the present embodiment, the preparation method of this high-temperature-resistant, corrosion-resistant and slag-thinning ceramic coating includes the following steps in turn:

[0031] (1) Clean the surface of the metal substrate: remove dust, grease and oxides on the surface of the metal substrate, and clean and dry the metal substrate;

[0032] (2) Preparation of bonding layer: roughen the metal substrate by sandblasting, and use thermal spraying technology to prepare bonding layer powder NiAl on the surface of the metal substrate;

[0033] (3) Preparation of slurry: mix the mineral powder according to the following ratio, add potassium silicate binder after fully mixing, add inorganic defoamer after stirring evenly, and obtain slurry after stirring evenly;

[0034] Mineral powder consists of the following components by weight: SiO 2 50 parts, Al 2 o 3 20 parts, ZrO 2 13 parts, TiO 2 2 parts, SiC2 parts, ZrSiO 4 8 parts and Ce...

Embodiment 2

[0049] Such as figure 1 As shown, in the present embodiment, the preparation method of this high-temperature-resistant, corrosion-resistant and slag-thinning ceramic coating includes the following steps in turn:

[0050] (1) Clean the surface of the metal substrate: remove dust, grease and oxides on the surface of the metal substrate, and clean and dry the metal substrate;

[0051] (2) Preparation of the bonding layer: the metal substrate is roughened by shot peening, and the bonding layer powder NiCr is prepared on the surface of the metal substrate by surfacing welding technology;

[0052] (3) Prepare the slurry: mix the mineral powder according to the following ratio, add the sodium silicate binder after fully mixing, add the inorganic defoamer after stirring evenly, and obtain the slurry after stirring evenly;

[0053] Mineral powder consists of the following components by weight: SiO 2 30 parts, Al 2 o 3 10 parts, ZrO 2 20 parts, TiO 2 5 parts, SiC5 parts, ZrSi...

Embodiment 3

[0067] Such as figure 1 As shown, in the present embodiment, the preparation method of this high-temperature-resistant, corrosion-resistant and slag-thinning ceramic coating includes the following steps in turn:

[0068] (1) Clean the surface of the metal substrate: remove dust, grease and oxides on the surface of the metal substrate, and clean and dry the metal substrate;

[0069] (2) Preparation of the bonding layer: the metal substrate is roughened by shot peening, and the bonding layer powder NiCrAlY is prepared on the surface of the metal substrate by surfacing welding technology to prepare the bonding layer;

[0070] (3) Preparation of slurry: mix the mineral powder according to the following proportions, mix well, add the mixture of potassium silicate binder and sodium silicate binder, stir well and then add the inorganic defoamer , to obtain a slurry after stirring evenly;

[0071] Mineral powder consists of the following components by weight: SiO 2 50 parts, Al ...

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Abstract

The invention discloses a preparation method of a high-temperature-resistant corrosion-resistant slag-dredging ceramic coating. The preparation method comprises the following steps of (1) cleaning thesurface of a metal matrix; (2) preparing a bonding layer; (3) preparing slurry; (4) performing hot press molding to obtain a microstructure; and (5) performing heating and sintering to form a ceramicprotective coating with the microstructure on the metal matrix. According to the preparation method, one bonding layer is formed on the surface of the matrix by a conventional coating technology-thermochemical method, and a coating blank with the microstructure is formed on the surface of the coating by using a mold by a hot press molding method, so that the contact angle of liquid slag on the surface of the coating is increased; the contact angle is 40 degrees greater than that of a similar coating preparation technology; the slag dredging effect is achieved, so that the liquid slag cannot adhere to the surface of the coating and can easily slide down from the surface of the coating; erosion of blast furnace slag to the coating is reduced; and the service life of the coating is prolonged, so that the purpose of protecting base metal matrix equipment is achieved.

Description

technical field [0001] The invention relates to a method for preparing a slag-thinning ceramic coating, in particular to a preparation method of a high-temperature-resistant and corrosion-resistant slag-thinning ceramic coating. Background technique [0002] At present, the existing technology adopts thermal spraying technology to prepare ceramic coatings on metal surfaces, and applies ceramic coatings to high temperature and slag corrosion environments. Ceramic coatings can protect metal substrates from high temperature wear and improve the service life of equipment. However, if the ceramic coating is applied to the blast furnace tuyere, the slag liquid will splash on the surface of the ceramic coating and stick to the surface of the ceramic coating, which will aggravate the failure of the ceramic coating, such as image 3 As shown, the metal substrate is corroded, reducing the service life of the ceramic coating, and the surface morphology of the eroded metal substrate is u...

Claims

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Application Information

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IPC IPC(8): C23C28/00B23K31/02C23C4/08C23C26/00
CPCC23C28/30C23C28/34C23C28/322C23C26/00C23C4/08B23K31/02
Inventor 白皓张泽飞李立鸿陈豪廖秀姻
Owner RAOPING YUEXING COPPER PROCESSING CO LTD
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