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Silicon carbide wear-resistant coating for repairing and protecting flow passage component

A technology of wear-resistant coatings and wetted parts, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of increased brittleness, decreased workability, poor toughness, etc., and achieve the goal of improving surface cohesion and toughness Effect

Active Publication Date: 2022-05-06
河北大唐国际王滩发电有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wear-resistant material using epoxy resin as the adhesive, although the hardness, strength, and adhesiveness meet the requirements, but after adding a large amount of fillers, the workability drops sharply and the brittleness increases, which is competent in dealing with purely physical wear. Due to its lack of toughness and poor toughness, its use effect under cavitation conditions is not ideal

Method used

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  • Silicon carbide wear-resistant coating for repairing and protecting flow passage component

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Premix 3000g of silicon carbide with a particle size of ≤1mm (2400g of 0.1~1mm silicon carbide and 600g of 0~0.1mm silicon carbide) with 250g of alumina with an average particle size of 4μm and 180g of zirconia with an average particle size of 4μm. At the same time, mix 1460g of polyurethane modified vinyl resin (DSM 6325 in the Netherlands) with 80g of highly dispersed silica (Cabot TS-720), 100g of nano-magnesium oxide, and 80g of tricresyl phosphate, and place in a Vacuumed mixing and stirring vessel. After that, gradually mix in the premixed silicon carbide / alumina / zirconia. During this process, all materials are thoroughly mixed. Finally, the mixed material was further thoroughly mixed under vacuum for about 10 minutes. The abrasion resistant coating is then filled into storage containers or sales packaging. In order to achieve aging hardening of wear-resistant coatings, when using, add 2.5% cyclohexanone peroxide curing agent by weight of wear-resistant coating...

Embodiment 2

[0022] Premix 3000g of silicon carbide with a particle size of ≤1mm (2400g of 0.1~1mm silicon carbide and 600g of 0~0.1mm silicon carbide) with 230g of alumina with an average particle size of 4μm and 150g of zirconia with an average particle size of 4μm. At the same time, mix 1460g of polyurethane modified vinyl resin (DSM 6325 in the Netherlands) with 80g of highly dispersed silica (Cabot TS-720), 120g of nano-magnesium oxide, and 80g of tricresyl phosphate, and place in a Vacuumed mixing and stirring vessel. After that, gradually mix in the premixed silicon carbide / alumina / zirconia. During this process, all materials are thoroughly mixed. Finally, the mixed material was further thoroughly mixed under vacuum for about 10 minutes. The wear resistant material is then packed into a storage container or sales package. In order to realize the age hardening of wear-resistant materials, when using, add 2.5% cyclohexanone peroxide curing agent by weight of wear-resistant material...

Embodiment 3

[0024] Premix 3400g of silicon carbide with a particle size of ≤1mm (2850g of 0.1~1mm silicon carbide and 550g of 0~0.1mm silicon carbide) with 250g of alumina with an average particle size of 4μm and 180g of zirconia with an average particle size of 4μm. At the same time, mix 1460g of polyurethane modified vinyl resin (DSM 6325 in the Netherlands) with 85g of highly dispersed silica (Cabot TS-720), 100g of nano-magnesium oxide, and 80g of tricresyl phosphate, and place in a Vacuumed mixing and stirring vessel. After that, gradually mix in the premixed silicon carbide / alumina / zirconia. During this process, all materials are thoroughly mixed. Finally, the mixed material was further thoroughly mixed under vacuum for about 10 minutes. The wear resistant material is then packed into a storage container or sales package. In order to realize the age hardening of wear-resistant materials, when using, add 2.5% cyclohexanone peroxide curing agent by weight of wear-resistant material...

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Abstract

The invention discloses a silicon carbide wear-resistant material for repairing and protecting flow passage components, and relates to the technical field of silicon carbide wear-resistant materials. The silicon carbide ceramic is prepared from the following components in percentage by weight: 46 to 51.3 percent of silicon carbide with the particle size of 0.1 mm to 1 mm, 9.9 to 11.83 percent of silicon carbide with the particle size of 0 to 0.1 mm, 4.5 to 4.93 percent of aluminum oxide powder, 1.8 to 2.34 percent of nano magnesium oxide, 2.93 to 3.6 percent of zirconium oxide powder and 1.53 to 1.58 percent of silicon dioxide. 1.44%-1.84% of an additive and 26.28%-28.8% of polyurethane modified vinyl resin. Silicon carbide is a necessary part in filler substances, oxide with the average particle size smaller than that of silicon carbide is added for filling gaps between silicon carbide, and silicon carbide particles are more compact by adjusting the particle size of the silicon carbide particles; the polyurethane modified vinyl resin is used, so that the toughness of the wear-resistant material is improved, and the purposes of improving the surface cohesion, the wear resistance, the bonding strength and the fluid cavitation resistance of a cured material of the wear-resistant material are achieved.

Description

technical field [0001] The invention relates to the technical field of silicon carbide wear-resistant coatings, in particular to a silicon carbide wear-resistant coating used for repairing and protecting flow-through parts. Background technique [0002] Silicon carbide wear-resistant materials are mainly used to repair and protect wetted parts, and are often sold in the form of high-viscosity repair agents, which are mixed with curing agents to self-produce composite materials. Metal and alumina particles are usually used as filler substances, and adhesives are required to embed the filler substances into the material. The adhesive is used as a bonding agent to fix the composite material to the surface of the object to be repaired. In fact, the adhesive has a great influence on the wear strength. No contribution. Therefore, in order to improve the anti-wear properties of the repair compound, a high content of anti-wear filler substances is required. [0003] Composite wear...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61
CPCC09D175/04C09D7/61C08K2003/2227C08K2003/222C08K2003/2244C08K2201/005C08K2201/014C08K3/34C08K3/22C08K3/36
Inventor 聂鹏飞王兴飞李玉军
Owner 河北大唐国际王滩发电有限责任公司