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A method for preparing a boronizing layer on the surface of a high-entropy alloy

A technology of high-entropy alloy and boronizing layer, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as easy to fall off, difficult to exert the performance of high-entropy alloy, and weak matrix bonding force , to achieve the effects of high bonding strength, fast permeation speed, and process deformation and gas consumption

Active Publication Date: 2020-07-10
TAIYUAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

At present, the existing technologies are nothing more than using magnetron sputtering deposition, electrochemical deposition and laser cladding to prepare high-entropy alloy coatings and coat high-entropy alloy surfaces, but the coatings and coatings obtained by these methods are not It is very thin, and the bonding force with the matrix is ​​not strong, it is easy to fall off, and it is difficult to take advantage of the performance of high-entropy alloys

Method used

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  • A method for preparing a boronizing layer on the surface of a high-entropy alloy
  • A method for preparing a boronizing layer on the surface of a high-entropy alloy
  • A method for preparing a boronizing layer on the surface of a high-entropy alloy

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Embodiment 1

[0026] A high entropy alloy Al 0.25 The preparation method of CoCrFeNi surface boronizing layer, concrete steps are as follows:

[0027] (1) Processing Al 0.25 CoCrFeNi sample:

[0028] When processing high-entropy alloy substrate samples, a cutting machine was used to process samples with a size of 10 mm × 10 mm × 1.5 mm.

[0029] (2) Clean Al 0.2 5CoCrFeNi sample surface:

[0030] When cleaning the surface of the high-entropy alloy substrate sample, grind the alloy sample with 300#, 800#, 1000#, 1500# and 2500# SiC sandpaper of different particle sizes in sequence, and then use diamond polishing paste with a particle size of 0.5 μm for mechanical polishing There are no scratches on the surface under a 100x optical microscope, and finally cleaned with an ultrasonic cleaner in alcohol for 5 minutes, and dried for later use.

[0031] (3) Put the cleaned high-entropy alloy sample in a stainless steel container filled with powder boronizing agent, seal it with water glass an...

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Abstract

The invention discloses a preparation method of a boronizing layer on the surface of a high-entropy alloy. The preparation method includes the following steps that (1) a high-entropy alloy substrate after grinding and polishing is cleaned by an ultrasonic cleaning machine at room temperature; (2) cleaned high-entropy alloy samples are placed in a stainless steel container filled with a powder boriding agent, sealed with water glass and then placed in a thermostat for drying; (3) the stainless steel container containing the samples is placed into a box-type resistance furnace, heated to 900 DEGC along with the furnace and subjected to heat preservation for 3-9 hours; and (4) after heat preservation, the samples are cooled to room temperature along with the furnace and then removed. According to the preparation method of the boronizing layer on the surface of the high-entropy alloy, the prepared boronizing layer on the surface of the high-entropy alloy has the advantages of thick penetrating layer, high bonding strength, high hardness, wear resistance and corrosion resistance; and the preparation method has the characteristics of high penetrating speed, good penetrating layer performance, small process deformation, little gas and electricity consumption and the like, is a pollution free and nuisanceless ideal process, and can be widely used in the working conditions with the high demands on wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a method for preparing a boronizing layer on the surface of a high-entropy alloy, belonging to the field of surface treatment of metal materials. Background technique [0002] Boronizing is an important part of the surface treatment of metal materials. It can endow parts with various special functions such as high hardness, wear resistance, high temperature resistance, corrosion resistance, oxidation resistance, fatigue resistance, and radiation protection. Energy and resources, a surface strengthening method to obtain significant economic benefits, has more and more applications in many fields. High-entropy alloy is a new type of alloy material designed by Ye Junwei, a Taiwanese scholar in the 1990s, based on the concept of equimolar ratio and high mixing entropy. idea. Therefore, high-entropy alloys have a series of excellent properties, such as high strength, high hardness, high wear resistance, excellent oxidation resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/68
CPCC23C8/68
Inventor 乔珺威侯晋雄张敏石晓辉杨慧君吴玉程
Owner TAIYUAN UNIV OF TECH
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