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Preparation method of high-entropy alloy coating capable of being used for strengthening surface of operation machine

A high-entropy alloy and coating technology, applied in metal material coating process, coating, vacuum evaporation coating and other directions, can solve the problems of difficult industrial application, thick coating thickness, uneven spraying, etc., to improve the hardness and Anti-friction and wear performance, large impact load, and the effect of improving work efficiency

Pending Publication Date: 2022-07-12
SANY HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it solves the problems of laser cladding, magnetron sputtering, hot pressing sintering and other preparation methods, which have high cost and are not easy to be applied industrially, the preparation process still uses a fixed material as the substrate, through the spray gun motion to control the spray, so it still has the problem of uneven spray
Moreover, the thickness of the prepared high-entropy alloy coating is 200 μm, and this method also has the defect that the coating thickness is relatively thick

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present invention provides a method for preparing a high-entropy alloy coating. During specific implementation, the method includes: sputtering FeMnNiCoCr on the surface of a uniformly rotating substrate by using the double cathode glow discharge plasma technique. coating; the thickness of the FeMnNiCoCr coating is 20-40 microns.

[0026] By using the dual cathode glow discharge plasma deposition technology combined with the rotating substrate, the micron-scale FeMnNiCoCr coating with high hardness, high Young's modulus and high friction and wear resistance can be uniformly prepared on the surface of the bucket teeth. Moreover, it is found in the present invention that when the thickness of the prepared FeMnNiCoCr coating exceeds 40 microns, the wear resistance in the later use process will be reduced, and the production cost will be wasted.

[0027] As a preferred embodiment of the present invention, the method further includes: cleaning the substrate with a plasma...

Embodiment approach

[0038] As a preferred embodiment of the present invention, the FeMnNiCoCr coating consists of V-shaped crystals.

[0039] As a preferred embodiment of the present invention, the shape of the base body can be regular or irregular, preferably the base body is an excavator bucket tooth; more preferably, the material of the excavator bucket tooth is HDT60RC or F24 or titanium alloy Ti6Al4V.

[0040] Those skilled in the art can further obtain other preferred embodiments of the present invention by optimizing the combination of the above preferred solutions.

[0041] Further, the present invention also provides a bucket tooth, the surface of which contains Fe, Mn, Ni, Co and Cr elements as main elements, and a FeMnNiCoCr coating with a thickness of 20-40 microns formed according to an equal atomic ratio or a nearly equal atomic ratio .

[0042] According to a bucket tooth provided by the present invention, the coating on the surface thereof is prepared by any of the above-mentioned ...

Embodiment 1

[0048] The selected material is HDT60RC excavator bucket teeth, and the surface is cleaned with a plasma cleaner for 30 minutes to remove impurities and oxides on the surface of the excavator bucket teeth.

[0049] The bucket teeth of the excavator bucket are fixed on the rotating device, and the axial length direction of the fixed shaft of the rotating device is perpendicular to the sputtering direction.

[0050] The FeMnNiCoCr coating was sputtered on the surface of the bucket teeth of the excavator bucket rotating at a constant speed by using the double cathode glow discharge plasma deposition technology; before the sputtering, the pressure of the vacuum chamber was set to be less than 5×10 -4 Pa; when sputtering at room temperature, set the vacuum chamber pressure to 35 Pa, the source material is FeMnNiCoCr high-entropy alloy with equal atomic percentage, and the distance between the source material and the bucket teeth of the excavator is set to 15 cm. The frequency of th...

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Abstract

The invention relates to the technical field of engineering machinery surface strengthening, in particular to a preparation method of a high-entropy alloy coating capable of being used for surface strengthening of an operation machine and the strengthened operation machine. Specifically, the preparation method comprises the following steps: sputtering a FeMnNiCoCr coating with the thickness of 20 to 40 microns on the surface of a base body which rotates at a constant speed by adopting a double-cathode glow discharge plasma deposition technology (Thedouble-cathode glow discharge plasma deposition) technology; and finally, sputtering the FeMnNiCoCr coating with the thickness of 20 to 40 microns on the surface of the base body which rotates at a constant speed. According to the novel coating process disclosed by the invention, the micron-sized coating with high hardness, high Young modulus and high friction and wear resistance is uniformly prepared on the surface of the bucket tooth, and the hardness and the friction and wear resistance of the excavator bucket tooth are remarkably improved; the bucket tooth of the excavator bucket can bear larger impact load under various working conditions, and the friction loss between the bucket tooth and materials is reduced, so that the working efficiency is greatly improved, and the service life of the bucket tooth of the excavator bucket is prolonged.

Description

technical field [0001] The invention relates to the technical field of surface strengthening of construction machinery, in particular to a preparation method of a high-entropy alloy coating which can be used for surface strengthening of working machinery. Background technique [0002] As the main type of construction machinery in today's era, excavators play a huge role in the country's production and construction, and are widely used in various infrastructure, large-scale projects, coal mines, etc. As one of the three major components of the working device (boom, stick, and bucket), the bucket is the most important part of the excavator to complete various tasks and functions in actual work. [0003] In practical work, buckets are often used for: loading and unloading materials, excavation, etc. Among them, bucket teeth are the most directly subjected to mechanical vibration, impact load and friction and wear. Due to the complexity of the actual working environment, its var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/34C23C14/50C23C14/16C22C30/00C23C14/02
CPCC23C14/3471C23C14/505C23C14/165C22C30/00C23C14/022
Inventor 王健王章坤曹君
Owner SANY HEAVY MACHINERY