Method for preparing iron-based amorphous coating through laser cladding

An iron-based amorphous and laser cladding technology, applied in coatings, metal material coating processes, etc., can solve problems such as inability to effectively prepare amorphous coatings, prevent large-area contact, and prevent iron-based amorphous The effect of crystallization

Active Publication Date: 2022-04-19
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, laser cladding is often used to prepare iron-based amorphous coatings. High temperatures will be generated during laser cladding. However, the crystallization temperature of iron-based amorphous is generally around 600°C. High temperatures will make iron-based amorphous coatings Crystallization of a large area cannot be effectively prepared into an amorphous coating

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  • Method for preparing iron-based amorphous coating through laser cladding
  • Method for preparing iron-based amorphous coating through laser cladding

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preparation example Construction

[0034] In the present invention, the method for preparing the aqueous solution of polyvinyl alcohol preferably includes: mixing polyvinyl alcohol with water and then heating. In the present invention, the polyvinyl alcohol is preferably mixed with water and then heated to form a viscous substance, so as to uniformly disperse the iron-based amorphous powder.

[0035] In the present invention, there is no special limitation on the mixing method of the polyvinyl alcohol and water, and a mixing method well known to those skilled in the art can be used.

[0036] In the present invention, the source of the polyvinyl alcohol is not particularly limited, and commercially available products well known to those skilled in the art can be used. In the present invention, the model of the polyvinyl alcohol is preferably 1788 low-viscosity type; the degree of alcoholysis of the polyvinyl alcohol is preferably 87.0.

[0037] In the present invention, the heating temperature after mixing the ...

Embodiment 1

[0056] (1) Mix 20 g of 1788 low-viscosity polyvinyl alcohol with an alcoholysis degree of 87.0 and 300 g of water, heat at 70° C. for 60 min, and stir with a magnetic stirrer at a stirring rate of 300 r / min to obtain an aqueous solution of polyvinyl alcohol;

[0057] (2) Get 50g of iron-based amorphous powder and pour it into 150mL of the aqueous solution of polyvinyl alcohol obtained in step (1), and stir for 5min according to a stirring rate of 300r / min to obtain a polyvinyl alcohol solution containing iron-based amorphous powder; , the composition of iron-based amorphous powder is Fe 53 Cr 25.8 Mo 16.8 B 2.08 C 2.44 , the amorphous content is 100%, and the particle size is 16-53 μm;

[0058] (3) Pour 0.5 g of multi-walled carbon nanotubes with an aspect ratio of 103 into 200 mL of the polyvinyl alcohol solution of the iron-based amorphous powder obtained in step (2), ultrasonically disperse for 3 h, and then heat at 70 ° C 60min to obtain a paste; wherein, the mass rat...

Embodiment 2

[0062] (1) Mix 40 g of 1788 low-viscosity polyvinyl alcohol with an alcoholysis degree of 87.0 and 500 g of water, heat at 70° C. for 80 min, and stir with a magnetic stirrer at a stirring rate of 300 r / min to obtain an aqueous solution of polyvinyl alcohol;

[0063] (2) Get 70g of iron-based amorphous powder and pour it into 200mL of the aqueous solution of polyvinyl alcohol obtained in step (1), and stir for 5min according to a stirring rate of 300r / min to obtain a polyvinyl alcohol solution containing iron-based amorphous powder; , the composition of iron-based amorphous powder is Fe 53 Cr 25.8 Mo 16.8 B 2.08 C 2.44 , the amorphous content is 100%, and the particle size is 16-53 μm;

[0064] (3) Pour 0.7 g of multi-walled carbon nanotubes with an aspect ratio of 104 into 270 mL of the polyvinyl alcohol solution of iron-based amorphous powder obtained in step (2), ultrasonically disperse for 3 h, and then heat at 70 ° C 60min to obtain a paste; wherein, the mass ratio o...

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Abstract

The invention belongs to the technical field of iron-based amorphous coatings, and provides a method for preparing an iron-based amorphous coating through laser cladding, which comprises the following steps: mixing iron-based amorphous powder, carbon nanotubes and an aqueous solution of polyvinyl alcohol to obtain paste; and coating a matrix with the paste, and then carrying out laser cladding to obtain the iron-based amorphous coating. According to the method, the paste is prepared from the iron-based amorphous powder, the aqueous solution of the polyvinyl alcohol and the carbon nanotubes, then the paste is coated on the substrate for laser cladding, the problem of large-area crystallization of the iron-based amorphous powder in the laser cladding process is solved, the carbon nanotubes can form a multi-layer net structure, the iron-based amorphous powder can be effectively separated, and the surface of the iron-based amorphous powder is coated with the carbon nanotubes. And large-area contact of the iron-based amorphous powder is prevented, so that an ordered crystal structure cannot be formed, and the aim of preventing crystallization of the iron-based amorphous powder is fulfilled. Experimental results show that the iron-based amorphous coating prepared by the method provided by the invention only contains an amorphous phase and does not contain a crystal phase.

Description

technical field [0001] The invention relates to the technical field of iron-based amorphous coatings, in particular to a method for preparing iron-based amorphous coatings by laser cladding. Background technique [0002] Iron-based amorphous has good anti-corrosion properties, ultra-high hardness, and good wear resistance. The use of iron-based amorphous powder to prepare metal coatings can effectively protect the base material, improve the service life of the base material, and effectively reduce corrosion. [0003] In the prior art, laser cladding is often used to prepare iron-based amorphous coatings. High temperatures will be generated during laser cladding. However, the crystallization temperature of iron-based amorphous is generally around 600°C. High temperatures will make iron-based amorphous coatings A large area of ​​crystallization cannot be effectively prepared into an amorphous coating. Therefore, how to prevent the crystallization of the iron-based amorphous ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C23C24/10C22C45/02
CPCC23C24/103C22C45/02Y02P10/25
Inventor黄江师文庆李凯玥王文华谢玉萍
OwnerGUANGDONG OCEAN UNIVERSITY