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Low temperature resistant high entropy alloy prepared by powder core wire and its arc deposition

A powder core wire, high-entropy alloy technology, applied in the direction of fusion spraying, metal material coating process, coating, etc., can solve the problems of powder leakage, low powder core adhesion, affecting coating performance, etc. Wide application prospects, high and low temperature elongation, high and low temperature strength effects

Active Publication Date: 2020-07-28
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two shortcomings in the current powder core wire material used for arc welding: (1) powder leakage problem, the existing powder core wire material preparation methods mainly include powder mixing, powder mixing, powder filling, sealing, rolling, drawing, winding wire, packaging and other processes, the powder core wire material prepared by this method has a low powder core bonding degree and is prone to powder leakage during the arc welding process
(2) The high-performance powder core wire material has poor versatility and cannot simultaneously meet the requirements of high strength, high hardness and high plasticity of the parts under low temperature conditions
[0003] At present, the known cost-effective arc cladding powder core wire material has a strong amorphous forming ability. After searching the prior art literature, it is found that the Chinese patent announcement number is: CN 107699843 A, and the announcement date is : 2018.02.16, the name of the invention is: a powder core wire material for the preparation of high amorphous content coatings and its preparation method and application. A complete amorphous structure is obtained, and some inherent defects (such as pores, oxides, etc.) in the coating affect the performance of the coating, and there is still the problem of powder leakage

Method used

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  • Low temperature resistant high entropy alloy prepared by powder core wire and its arc deposition
  • Low temperature resistant high entropy alloy prepared by powder core wire and its arc deposition
  • Low temperature resistant high entropy alloy prepared by powder core wire and its arc deposition

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Effect test

Embodiment 1

[0027] A kind of powder core wire material preparation method described in the present embodiment, concrete steps are as follows:

[0028] (1) Preparation of powder cores: Co, Cr, Fe, Ni, Cu powders are evenly mixed according to the atomic fraction ratio of 1:1:1:1:1, put into a high-energy ball mill for grinding, and after ball milling at a speed of 150r / min for 2 hours, Obtain high-entropy alloy nanocrystals with a size of 50nm;

[0029] (2) Spray deposition powder core: Fill the high-entropy alloy nanocrystal prepared in step (1) into the crucible melting furnace of the spray deposition equipment and heat it to 1000°C to form copper Cu melt and Co, Cr, Fe, Ni nano The suspension of mixed particles is added to the metal liquid bag, and the high-pressure argon gas of 0.7-0.85MPa is introduced to atomize the melt to form mixed solid-liquid droplets, which are deposited on a 0.5mm pure aluminum belt with a deposition distance of 700mm. The thickness of the core deposition laye...

Embodiment 2

[0033] A kind of powder core wire material preparation method described in the present embodiment, concrete steps are as follows:

[0034] (1) Preparation of powder cores: Co, Cr, Fe, Ni, Cu powders are evenly mixed according to the atomic fraction ratio of 1:1:1:1:1, put into a high-energy ball mill for grinding, and after ball milling at a speed of 150r / min for 2 hours, Obtain high-entropy alloy nanocrystals with a size of 50nm;

[0035] (2) Spray deposition powder core: Fill the high-entropy alloy nanocrystal prepared in step (1) into the crucible melting furnace of the spray deposition equipment and heat it to 1000°C to form copper Cu melt and Co, Cr, Fe, Ni nano The suspension of mixed particles is added to the metal liquid bag, and the high-pressure argon gas of 0.7-0.85MPa is introduced to atomize the melt to form mixed solid-liquid droplets, which are deposited on a 0.5mm pure aluminum belt with a deposition distance of 700mm. The thickness of the core deposition laye...

Embodiment 3

[0039] A kind of powder core wire material preparation method described in the present embodiment, concrete steps are as follows:

[0040] (1) Preparation of powder cores: Co, Cr, Fe, Ni, Cu powders are evenly mixed according to the atomic fraction ratio of 1:1:1:1:1, put into a high-energy ball mill for grinding, and after ball milling at a speed of 150r / min for 2 hours, Obtain high-entropy alloy nanocrystals with a size of 50nm;

[0041](2) Spray deposition powder core: Fill the high-entropy alloy nanocrystal prepared in step (1) into the crucible melting furnace of the spray deposition equipment and heat it to 1000°C to form copper Cu melt and Co, Cr, Fe, Ni nano The suspension of mixed particles is added to the metal liquid bag, and the high-pressure argon gas of 0.7-0.85MPa is introduced to atomize the melt to form mixed solid-liquid droplets, which are deposited on a 0.5mm pure aluminum belt with a deposition distance of 700mm. The thickness of the core deposition layer...

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Abstract

The invention provides a powder core wire material and a low-temperature resistant high-entropy alloy prepared by arc welding thereof, which is composed of an aluminum strip and a powder core. The aluminum strip and the powder core are made of Co, Cr, Fe, Ni, Cu, according to the The atomic ratio is 1:1:1:1:1, and the thickness of the aluminum strip is 0.5mm. The preparation method of the silk material comprises the following steps: (1) preparing powder cores; (2) spraying and depositing powder cores; (3) cold rolling; (4) coiling and drawing wires. The high-entropy alloy coating prepared by the invention has high low-temperature resistance strength, high low-temperature hardness and high low-temperature elongation.

Description

technical field [0001] The invention belongs to the field of material processing engineering thermal spraying, and in particular relates to a powder core wire material and a low-temperature-resistant high-entropy alloy prepared by arc welding. Background technique [0002] In order to meet the needs of the development of metal 3D printing technology and the on-site repair of major industrial equipment and military equipment, the 3D printing and repair technology of arc cladding metal wire has gradually become a hot research topic for many scholars at home and abroad. Arc cladding uses an electric arc to heat the wire to a molten or semi-molten state, and under the action of high-pressure gas, the melt is sprayed and deposited on the surface of the substrate at a certain speed to form a coating. At present, there are two kinds of wire materials used for arc cladding, metal solid wire and powder core wire material. Generally, high-strength metal rods have poor ductility and ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C23C4/131C23C4/073C23C4/08C23C4/123
CPCC22C30/02C23C4/073C23C4/08C23C4/123C23C4/131
Inventor 王泽李小平卢雅琳王江涛张扬王洪金雷卫宁丛孟启
Owner JIANGSU UNIV OF TECH