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Powder core wire and low-temperature-resistant high-entropy alloy prepared by electric-arc deposition of powder core wire

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 low powder core adhesion, powder leakage, affecting coating performance, etc. High and low temperature elongation, wide application prospect, effect of high and low temperature strength

Active Publication Date: 2018-12-07
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, wire rolling, wire 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 meet the requirements of high strength, high hardness and high plasticity of the parts under low temperature conditions at the same time
[0003] At present, the known cost-effective arc cladding powder core wire material has a strong amorphous forming ability. After searching the existing technical 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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  • Powder core wire and low-temperature-resistant high-entropy alloy prepared by electric-arc deposition of powder core wire
  • Powder core wire and low-temperature-resistant high-entropy alloy prepared by electric-arc deposition of powder core wire
  • Powder core wire and low-temperature-resistant high-entropy alloy prepared by electric-arc deposition of powder core wire

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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: inject 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 mixed suspension of 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 la...

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: inject 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 mixed suspension of 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 la...

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 mixed suspension of 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 and a low-temperature-resistant high-entropy alloy prepared by electric-arc deposition of the powder core. The powder core wire comprises an aluminum belt anda powder core, wherein each of the aluminum belt and the powder core consists of Co, Cr, Fe, Ni and Cu in an equal atomic ratio being 1 to 1 to 1 to 1 to 1 to 1; and the thickness of the aluminum belt is 0.5 mm. The preparation method for the wire comprises the following steps of: (1) preparing the powder core; (2) spraying a deposited powder core; (3) performing cold-rolling; and (4) performingtube coiling and wire drawing. A prepared high-entropy alloy coating has high low-temperature-resistant strength, high low-temperature hardness and high low-temperature ductility.

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 research hotspot of 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 are d...

Claims

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Application Information

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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
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