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A kind of composite coating, preparation method and application

A composite coating and composite wire technology, applied in the coating, metal material coating process, etc., can solve the difficulty of feeding tiny hard phase particles, uneven distribution of hard phase particles, and limited size of hard phase particles and other problems, to achieve the effect of widening the scope of use, small microstructure, and solving feeding difficulties

Active Publication Date: 2022-03-15
YANGJIANG KNIFESCISSOR HARDWARE RES INSTITUTION OF IND TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to solve the problem that the particle size of the hard phase is limited in the preparation process of the existing composite coating
One of the purposes of the present invention is to solve the inhomogeneous distribution of hard phase particles in the coating during the preparation of the existing composite coating
One of the purposes of the present invention is to solve the problem that the tiny hard phase particles are difficult to feed in the preparation process of the existing composite coating

Method used

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  • A kind of composite coating, preparation method and application
  • A kind of composite coating, preparation method and application
  • A kind of composite coating, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Such as figure 1 Shown, the invention provides a kind of preparation method of composite coating, comprises the following steps:

[0077] S1, preparing composite wire 4;

[0078] Select non-spherical titanium nitride hard phase particles with an average particle size of 5 μm as the strengthening phase, select 3Cr13 stainless steel as the base material, use the base material as the outer skin 41, and use the hard phase particles as the inner core 42 to prepare a composite material with a diameter of 0.5 mm. wire4;

[0079] S2, plasma cladding

[0080] No. 45 carbon steel is selected as the base material 1 of plasma cladding, and 3Cr13 stainless steel powder is selected as the basic powder material 3, with an average particle size of 53 μm;

[0081] The relevant parameters for setting plasma cladding are: ion air flow is 5L / min, protective air flow is 3L / min, powder feeding air flow rate for basic powder material is 5L / min, cladding current is 60A, powder feeding speed...

Embodiment 2

[0089]The difference from Example 1 is that the hard phase particles in this embodiment are non-spherical niobium carbide with an average particle diameter of 3 μm; the base material is 440A stainless steel, the base powder material is 440A stainless steel powder, and the average particle diameter of the powder is 105 μm; Material 1 is 2Cr13 stainless steel; The diameter of the prepared composite wire is 0.4mm, adopts the method identical with embodiment 1, is 10 degrees with the angle between lateral wire feeding direction and plasma cladding nozzle 2 axes, The composite wire 4 is fed into the molten pool for melting to obtain the composite coating 5 .

[0090] The test results of the composite coating 5 sample show that the composite coating 5 has no cracks on the surface, the average Rockwell hardness is 66HRC, the wear amount is 28mg, and the friction coefficient is 0.31. Such as Figure 3A As shown, it can be clearly seen that the hard phase particles of niobium carbide ...

Embodiment 3

[0092] The difference from Example 1 is that the hard phase particles in this example are non-spherical niobium diboride with an average particle size of 0.1 μm, the base material is 304 stainless steel, the base powder material is 304 stainless steel powder, and the average particle size is 80 μm ; Base material 1 is 304 stainless steel; The diameter of the prepared composite wire is 0.7mm, adopts the method identical with embodiment 1, is 80 with the angle between lateral wire feeding direction and plasma cladding nozzle 2 axes The composite coating 5 can be obtained by feeding the composite wire 4 into the molten pool for melting.

[0093] The test results of the composite coating 5 sample show that the composite coating 5 has no cracks on the surface, the average Rockwell hardness is 67HRC, the wear amount is 27mg, and the friction coefficient is 0.32. Such as Figure 4A As shown, it can be clearly seen that the hard phase particles of niobium diboride are evenly distribu...

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Abstract

The invention discloses a composite coating, a preparation method and its application. The preparation method comprises the following steps: preparing hard phase particles and base materials into a composite wire; performing plasma cladding on the base powder material to generate a molten pool; The composite wire is directly sent into the molten pool for melting without a heat source, and the composite coating can be obtained. The composite coating is prepared by the method described above; the composite coating can be used as an anti-wear coating for the substrate of equipment components. The preparation method provided by the invention can solve the problems of limited size of hard phase particles, uneven distribution in the coating, and difficulty in feeding tiny hard phase particles in the process of preparing composite coatings. With high hardness, strong corrosion resistance and wear resistance, the composite coating is suitable for all kinds of wearable instruments, especially for the cutting edge of knives and scissors.

Description

technical field [0001] The invention relates to the technical field of composite coating preparation, in particular to a composite coating with hard phase particles, a preparation method and an application. Background technique [0002] At present, the commonly used preparation methods of surface composite coatings include electroplating, surface welding, vapor deposition, spraying and so on. In order to improve the wear resistance and / or corrosion resistance of the coating, researchers usually add carbides with high hardness (such as tungsten carbide, titanium carbide, vanadium carbide) or nitrides and other hard materials during the preparation of the coating. mass phase particles. Often these hard phase particles are added by ball milling and mixing with the base powder to form a composite powder, and then the composite powder is sent to a heat source for melting to generate molten droplets, which are deposited on the surface of the substrate to obtain a high-performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 张瑞华路超屈岳波肖梦智栗子林康平刘燕红邱桥华炳钟
Owner YANGJIANG KNIFESCISSOR HARDWARE RES INSTITUTION OF IND TECH
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