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Cored wire of Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying

An amorphous nanocrystalline and arc spraying technology, which is applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of poor wear resistance, low hardness, and inability to meet the application of surface protection. The effect of broad prospects, excellent corrosion resistance and wear resistance

Active Publication Date: 2013-10-16
ACADEMY OF ARMORED FORCES ENG PLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum coating is more sensitive to the pitting corrosion of sodium chloride solution, and its low hardness leads to poor wear resistance, which makes this type of material unable to meet the surface protection application of modern industrial materials.

Method used

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  • Cored wire of Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying
  • Cored wire of Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying
  • Cored wire of Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] 1. Preparation of aluminum-based powder core wire

[0022] Select a 10×0.3 (width 10mm, thickness 0.3mm) pure aluminum strip, first roll it into a U shape, take Ni, Mm and Co and mix them uniformly, and then add the mixed powder into the U-shaped aluminum strip groove , the composition of aluminum-based powder core wire material is: 55~65wt% Al, 20~25wt% Ni, 12~16wt% Mm, 0~5wt% Co, and described Mm is 25wt% La, 54wt% Ce, 6wt% % Pr and 15wt% Nd mixed rare earth. Close the U-shaped groove to make it wrap the mixed powder, and finally obtain the aluminum-based powder core wire with a diameter of 2.0mm through multi-channel wire drawing and reduction. The schematic diagram of the preparation process and the actual photo of the aluminum-based powder core wire are attached figure 1 shown.

[0023] 2. Preparation of Aluminum-based Amorphous-nanocrystalline Composite Coating

[0024] The aluminum-based coating is prepared by high-speed spraying technology, and the spraying p...

Embodiment 1

[0025] Example 1 The aluminum-based powder core wire material of this example was prepared by using the above-mentioned preparation method of the aluminum-base powder core wire material, and its composition is shown in formula 1 in attached table 1. attached image 3 This is the SEM photo of the aluminum-based amorphous nanocrystalline composite coating obtained in Example 1. It can be seen that the coating has a dense structure, low porosity, and a good combination of the coating and the substrate. attached Figure 4 and 5 They are the XRD and TEM photos of the aluminum-based amorphous nanocrystalline composite coating obtained in Example 1 respectively. Since Co powder is not added to the powder core wire in Example 1, the coating is composed of amorphous, α-Al nanocrystalline , AlNi nanocrystals and crystallized phases. Through fitting calculation, the amorphous content in the coating is about 18.6% (volume fraction), and the size of the nanocrystals is in the range of 1...

Embodiment 2

[0026] Example 2 The aluminum-based powder core wire material of this example was prepared by using the above-mentioned preparation method of the aluminum-base powder core wire material, and its composition is shown in formula 2 in attached table 1. attached Figure 4 This is the SEM photo of the aluminum-based amorphous nanocrystalline composite coating obtained in Example 2. It can be seen that the coating has a dense structure, low porosity, and good bonding between the coating and the substrate. attached Figure 5 and 6 They are the XRD and TEM photographs of the aluminum-based amorphous nanocrystalline composite coating obtained in Example 2 respectively. Since the powder core wire material in Example 2 contains Co powder, the coating consists of amorphous, α-Al nanocrystalline, AlNi nanocrystals, Al 13 co 4 Nanocrystalline and crystallized phase together. Through fitting calculation, the amorphous content in the coating is about 17.2% (volume fraction), and the nano...

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Abstract

The invention provides a cored wire of an Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying and belongs to the technical field of surface engineering. The cored wire of the Al-Ni-Mm-Co amorphous nanocrystalline composite coating is mainly applied to surface protection of steel structural parts and light alloy parts of equipment. The cored wire of the Al-Ni-Mm-Co amorphous nanocrystalline composite coating prepared through high-speed electric arc spraying provided by the invention is characterized in that a pure aluminium tape is used as the outer sheath of the cored wire and metal powder of Ni, Mm and Co is added to the core, and the cored wire is composed of 55-65wt% of Al, 20-25wt% of Ni, 12-16wt% of Mm and 0-5wt% of Co, wherein Mm is mixed rare earths including 25wt% of La, 54wt% of Ce, 6wt% of Pr and 15wt% of Nd. The aluminium-based amorphous nanocrystalline composite coating has double functions of anti-corrosion and anti-wear and is capable of providing effective technical guarantee and material guarantee for protecting the surfaces of steel structural parts and light alloy parts against corrosion and the like.

Description

technical field [0001] The invention belongs to the field of thermal spraying in material processing engineering, and the invention is mainly used in the surface protection of steel structure parts and light alloy parts serving in coastal and offshore corrosive working environments. Background technique [0002] The damage and deterioration of materials caused by corrosion have brought huge economic losses to the national economy. According to the relevant data, every country in the world has caused huge economic losses due to corrosion, and its value can account for 3-5% of the GDP of each country. my country also paid a heavy price due to corrosion. Statistics show that in 1995, my country's economic loss due to corrosion was as high as 150 billion yuan, accounting for about 4% of the GDP of that year; %; In 2002, my country's corrosion economic loss was nearly 600 billion yuan, accounting for about 5% of GDP in that year; in 2009, my country's corrosion economic loss exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/131
Inventor 梁秀兵徐滨士张志彬陈永雄胡振峰蔡志海乔玉林
Owner ACADEMY OF ARMORED FORCES ENG PLA