Preparation method of CoCrFeMnNi high-entropy alloy cladding layer

A high-entropy alloy, cladding layer technology, applied in the direction of metal material coating process, coating, etc., to achieve the effect of high efficiency, low dilution rate, and avoiding metallurgical defects

Inactive Publication Date: 2019-08-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no scholars have used this process to prepare high-entropy alloy cladding layers.

Method used

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  • Preparation method of CoCrFeMnNi high-entropy alloy cladding layer
  • Preparation method of CoCrFeMnNi high-entropy alloy cladding layer
  • Preparation method of CoCrFeMnNi high-entropy alloy cladding layer

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051] In this embodiment, a CoCrFeMnNi high-entropy alloy cladding layer is prepared by prefabricated cladding using a cladding current of 10A;

[0052] 1): Weigh 30g of the prepared CoCrFeMnNi alloy powder and put it into an oven, set the drying temperature to 100°C and the drying time to 4h to obtain the original powder without moisture;

[0053] 2): Evenly mix the dried high-entropy alloy powder and PVA binder in a mortar at a ratio of 30g:0.90ml to form a colloidal powder, and then put it into a mold groove of 50×4×1.5mm, Press to obtain powder bars;

[0054] 3): Put the prefabricated powder strips in an oven at 100°C for 4 hours, and take them out after drying;

[0055] 4): Clean the surface of the 200×100×2mm workpiece or substrate with an angle grinder, and then polish it with 80#, 120#, 240#, 400#, 800#, 1200# SiC sandpaper in sequence, after ultrasonic 40HZ After cleaning for 10 minutes, use plasma water and alcohol to clean, and dry in an oven at 60°C for 2 hours;...

example 2

[0059] In this embodiment, a CoCrFeMnNi high-entropy alloy cladding layer is prepared by prefabricated cladding using a cladding current of 30A;

[0060] 1): Weigh 30g of the prepared CoCrFeMnNi alloy powder and put it into an oven, set the drying temperature to 150°C and the drying time for 2 hours to obtain the original powder without moisture;

[0061] 2): Evenly mix the dried high-entropy alloy powder and PVA binder in a mortar at a ratio of 30g:1.10ml to form a colloidal powder, and then put it into a mold groove of 60×5×1.5mm, Press to obtain powder bars;

[0062] 3): Put the prefabricated powder strips in an oven at 150°C for 2 hours, and take them out after drying;

[0063] 4): Clean the surface of the 200×100×2mm workpiece or substrate with an angle grinder, and then polish it with 80#, 120#, 240#, 400#, 800#, 1200# SiC sandpaper in sequence, after ultrasonic 60HZ After cleaning for 5 minutes, use plasma water and alcohol to clean, and dry in an oven at 80°C for 1 h...

example 3

[0066] In this embodiment, a CoCrFeMnNi high-entropy alloy cladding layer is prepared by prefabricated cladding using a cladding current of 50A;

[0067] 1): Weigh 30g of the prepared CoCrFeMnNi alloy powder and put it into an oven, set the drying temperature at 100-150°C and the drying time for 2-4 hours to obtain the original powder without moisture;

[0068] 2): Evenly mix the dried high-entropy alloy powder and PVA binder in a mortar at a ratio of 30g:1.0ml to form a colloidal powder, and then put it into a mold groove of 50×4×2.0mm, Press to obtain powder bars;

[0069] 3): Put the prefabricated powder strips in an oven at 120°C for 3 hours, and take them out after drying;

[0070] 4): Clean the surface of the 200×100×2mm workpiece or substrate with an angle grinder, and then polish it with 80#, 120#, 240#, 400#, 800#, 1200# SiC sandpaper in sequence, after ultrasonic 50HZ After cleaning for 8 minutes, use plasma water and alcohol to clean, and place in an oven to dry a...

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Abstract

The invention relates to a preparation method of a CoCrFeMnNi high-entropy alloy cladding layer. With the adoption of a microbeam plasma welding machine, the surface of a part is covered with CoCrFeMnNi high-entropy alloy powder through powder feeding cladding or spray welding cladding, and the cladding layer is formed on the surface of a mechanical part through the changing process of a metallurgical reaction, cooling solidification and solid-state phase transformation. The dilution rate of the high-entropy alloy cladding layer is within 10%, and is remarkably less than that of laser cladding; the cladding layer is dense and has no defects of cracks, air holes and the like; the corrosion resistance is higher than that of a 304 corrosion-resistant plate; the comprehensive performance is good; and the life of a workpiece under the bad working condition is prolonged. The cladding layer is prepared with the adoption of a microbeam plasma arc cladding technology, so that the defects in thesolidification process are reduced; and the production efficiency is improved substantially, the cost is reduced substantially, the adaptability is high, and the technologized production is easy to achieve.

Description

technical field [0001] The invention relates to a preparation method of a high-entropy alloy cladding layer. It is a method of preparing the repair layer by a micro-beam plasma arc cladding process with small heat input and strong adaptability, and obtains a repair layer with a small dilution rate, compactness, no cracks and pores, etc., which has wear resistance, corrosion resistance, High-temperature oxidation-resistant CoCrFeMnNi high-entropy alloy cladding layer. Background technique [0002] With the development of aviation, aerospace, electronics, communication and other technologies, higher and higher requirements are put forward for the performance of materials, and the performance of general alloys can no longer meet people's requirements to a certain extent. High-entropy alloys are one of the new alloys that have emerged in recent years. Others are composed of 5 or more elements in an equimolar or nearly equimolar ratio. The performance of the alloy is determined ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/00
CPCC22C30/00C23C24/106
Inventor 叶福兴焦志鹏
Owner TIANJIN UNIV
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