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A Fe-based amorphous powder material and anti-corrosion and wear-resistant amorphous coating

A technology of powder material and amorphous coating, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problem of high price of metal Mo, high cost of research and application, unfavorable coating wear resistance, etc. problem, to achieve good amorphous formation ability, low cost, and low corrosion current density

Active Publication Date: 2022-02-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Fe 49.7 Cr 18 mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 and SAM1651: Fe 48 Mo 14 Cr 15 Y 2 C 15 B 6 ) series of alloys, the metal Mo is expensive, and the cost of research and application is very high; the strategic element W is a high melting point metal, which is not conducive to melting and spraying; the rare earth element Y is not conducive to the wear resistance of the coating, and the cost of raw materials is high

Method used

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  • A Fe-based amorphous powder material and anti-corrosion and wear-resistant amorphous coating
  • A Fe-based amorphous powder material and anti-corrosion and wear-resistant amorphous coating
  • A Fe-based amorphous powder material and anti-corrosion and wear-resistant amorphous coating

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preparation example Construction

[0019] The preparation steps of the Fe amorphous powder material provided by the present invention are as follows: select high-purity raw materials, carry out precise batching according to the chemical composition formula of the Fe-based amorphous alloy, and melt the raw materials into master alloy ingots through a vacuum arc melting furnace. The obtained master alloy ingot is broken into small fragments, and a spherical Fe-based amorphous powder material with a completely amorphous structure is prepared by a vacuum atomization method, and the particle size of the powder material is 5-50um.

[0020] The present invention adopts the supersonic flame spraying technology to spray the Fe-based amorphous powder on the surface of the base material. The preferred spraying process is as follows: Oxygen flow rate: 43-53 m 3 / h, kerosene flow rate: 18~24 L / h, powder feeding rate: 18~23g / min, spraying speed: 300~400 mm / s.

[0021] The coating prepared by the above technology has a compl...

Embodiment 1

[0023] Example 1: (1) During the implementation of this specific example, the composition of the Fe-based amorphous alloy is Fe 43.6 Ni 17.4 Cr 9 co 6 B 17.5 Si 1.5 Nb 5 (at.%), batched according to the atomic molar ratio of the required components, and smelted through a vacuum electric arc furnace to obtain a master alloy ingot with a uniform composition;

[0024] (2) Break the master alloy ingot prepared in step (1) into small pieces, and prepare Fe-based amorphous powder material through vacuum atomization equipment. The powder is basically spherical and has a smooth surface, without satellite balls, etc. looks like figure 1 shown. The particle size of the powder is concentrated in 10-48um, with good fluidity, figure 2 The particle size distribution diagram of the powder material. As a comparison, the obtained master alloy ingot was subjected to a copper mold suction casting method to obtain a bulk amorphous alloy with a diameter of 2 mm.

[0025] The above powder ...

Embodiment 2

[0031] Embodiment 2: In this embodiment, the Fe-based amorphous alloy composition is Fe 41.6 Ni 19.4 Cr 9 co 6 B 17.5 Si 1.5 Nb 5 , the preparation method of the Fe-based amorphous powder material is the same as in Example 1, the difference is that according to the chemical composition formula Fe 41.6 Ni 19.4 Cr 9 co 6 B 17.5 Si 1.5 Nb 5 The atomic molar ratio ingredients in .

[0032] Same as Example 1, the amorphous powder prepared above is spherical and has a smooth surface, has good fluidity, and the particle size of the powder is concentrated in 10-48um; the X-ray diffraction pattern of the amorphous powder shows that the powder is Completely amorphous structure.

[0033] The Fe-based amorphous coating was prepared by supersonic flame spraying technology, the Fe-based amorphous powder prepared above was selected, and the substrate was A32 ship hull steel. Spraying process parameters are: oxygen flow rate 51 m 3 / h, kerosene flow rate 22 L / h, powder feeding ...

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Abstract

An Fe-based amorphous powder material and anti-corrosion and wear-resistant amorphous coating, composed of metal Fe, Ni, Cr, Co, Nb and non-metal B, Si, its chemical formula is Fe a Ni b Cr c co d B e Si f Nb g , where a, b, c, d, e, f, g are the atomic mole percentages of the corresponding elements, and 0≤b≤17.4, 0≤c≤9, 4≤d≤6, 15≤e≤17.5, 1.5≤f≤5.5, 3≤g≤5, the balance a is Fe. According to the chemical formula, batching and smelting are carried out to obtain master alloy ingots and crushed, and then a vacuum air atomization method is used to prepare Fe-based amorphous powder materials. The coating is prepared by spraying the Fe-based amorphous powder material on the base plate by supersonic flame spraying technology. The coating has a completely amorphous structure, good amorphous forming ability and thermal stability, low porosity, high Vickers hardness and good anti-corrosion and wear-resistant properties.

Description

technical field [0001] The invention belongs to surface modification and protection technology, and relates to Fe-based amorphous powder material with good amorphous forming ability and thermal stability. Background technique [0002] At present, my country's industry is in the stage of rapid development, and the total economic volume is also increasing year by year, but the cost of industrial development to the environment is relatively high, which makes the contradiction between industrial development and environmental resources increasingly prominent. Industrial development is inseparable from industrial production equipment. These industrial production equipment are mostly used for a long time in harsh environments such as high temperature, oxidation, corrosion and wear. The service stability and life of equipment components are restricted, and they are easily damaged due to corrosion and wear. , thus causing huge economic losses to our country. Improving the performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/02B22F9/08C23C4/129C23C4/08
CPCC22C45/02B22F9/082C23C4/129C23C4/08B22F9/002
Inventor 李春燕王海博王顺平李金玲蒲文斌李阳
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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