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Preparation and application method of silicon carbide material for repairing heavy equipment of thermal power plant

A technology for heavy-duty equipment and application methods, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of low bonding strength of composite materials, difficult control of repaired thickness, thermal deformation of impeller blades, etc., to eliminate the surface of workpieces Stress, excellent wear resistance and bonding performance, the effect of extending the service life

Active Publication Date: 2022-04-22
河北大唐国际王滩发电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although there are materials and methods for repairing corroded parts of some heavy machinery superhard material equipment in the prior art, there are still some problems and deficiencies, such as the brittleness of the repaired surface material and poor impact resistance; The thickness is not easy to control, and the thickness is not uniform enough; in addition, the incompatibility between the repair material and the base metal leads to thermal deformation of the impeller blades; the composite material has low bonding strength with the base, etc.

Method used

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  • Preparation and application method of silicon carbide material for repairing heavy equipment of thermal power plant
  • Preparation and application method of silicon carbide material for repairing heavy equipment of thermal power plant
  • Preparation and application method of silicon carbide material for repairing heavy equipment of thermal power plant

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preparation example Construction

[0044] The invention provides a method for preparing a silicon carbide epoxy resin composite material for repairing superhard materials for heavy equipment in a thermal power plant, comprising the following steps:

[0045] Step 1) Vacuum stirring: SiC and epoxy resin are stirred and mixed in a vacuum environment, wherein the ratio of silicon carbide to epoxy resin is 50-80:20-50, and the vacuum environment is in a vacuum mixing tank with high-speed rotating blades carried out in;

[0046] Step 2) Vacuum casting: Control the temperature in the spherical vacuum container at 50-70°C, place the casting mold in the spherical vacuum container, pump out the air in the spherical vacuum container until the vacuum degree is lower than 0.5T, and then seal the spherical vacuum container; In step 1), the material outlet of the vacuum mixing tank that has completed the vacuum stirring is connected with the tundish feed port of the spherical vacuum container, and after the connection is seal...

Embodiment

[0074] A silicon carbide composite material for repairing superhard materials for heavy equipment in thermal power plants and its application method when repairing heavy machinery parts,

[0075] Specifically include the following steps;

[0076] Step 1) Vacuum stirring: Stir and mix silicon carbide and epoxy resin in a vacuum environment, wherein the ratio of silicon carbide and epoxy resin is 80:20, and the vacuum environment is carried out in a vacuum stirring tank with high-speed rotating blades; Epoxy resin is selected from polyethylene glycol dioxirane methyl ether;

[0077] Step 2) Vacuum casting: Control the temperature in the spherical vacuum container at 60°C, place the casting mold in the spherical vacuum container, pump out the air in the casting mold until the vacuum degree is lower than 0.5T, and then seal the spherical vacuum container; put step 1) The material outlet of the vacuum stirring tank that completes the vacuum stirring in the process is connected wit...

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Abstract

The invention relates to a preparation method and application of a silicon carbide composite material for repairing a superhard material of heavy equipment in a thermal power plant, a silicon carbide resin composite material is obtained by vacuum casting, and an inhibitor is doped into the silicon carbide resin material to improve the fragility of a resin composition when the material is used for repairing a surface wear part of the heavy equipment. Meanwhile, compared with the prior art, the repairing carbon carbide resin material also has excellent wear resistance and bonding performance, and cracks, caused by later deformation and thermal expansion and cold contraction, at a heterogeneous interface are prevented. The repair process is simple, the service life of the heavy equipment is prolonged, meanwhile, the surface of the wear-resistant repair coating is smooth, and the wear resistance and the corrosion resistance of the wear-resistant repair coating reach corresponding working standards.

Description

technical field [0001] The present invention relates to the field of silicon carbide wear-resistant materials, in particular to a method for preparing a silicon carbide composite material for repairing superhard materials for heavy machinery and equipment, and more specifically, the present invention also relates to the repair of superhard materials for heavy machinery and equipment SiC composite material application. Background technique [0002] In heavy industries such as energy, metallurgy, and chemical production, circulating pumps and impellers are essential heavy equipment for transporting fluids. In some industries, such as desulfurization process, circulating pumps and heavy equipment are exposed to acidic and dusty environments for a long time, and their operating conditions are harsh. The conveying medium often contains solid particles and acid corrosion products. Severe wear or corrosion directly affects the normal operation of industrial production systems. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/14C04B24/12C04B14/32B23P6/00C09D5/08C09D7/61C09D7/63C09D163/00C04B111/20
CPCC04B26/14C04B14/324C04B24/12C09D163/00C09D7/61C09D7/63C09D5/08B23P6/00C04B2111/20C04B2111/00525C08K3/34C08K5/19
Inventor 聂鹏飞崔延洪柴泽民高江宇
Owner 河北大唐国际王滩发电有限责任公司
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