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Iron-based amorphous alloy powder, iron-based amorphous alloy coating and preparation method thereof

A technology of iron-based amorphous alloy and powder, which is applied in the field of preparation of this kind of amorphous alloy powder and amorphous coating, can solve the limitation of practical application, and the preparation technology of amorphous alloy coating has not obtained a wide range of research and practice. Application and other issues, to achieve excellent wear-resistant effect

Inactive Publication Date: 2012-07-04
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gas pressure in power metal spraying technology is low pressure (the gas velocity is limited to around the speed of sound), which limits the practical application of this technology
[0005] So far, none of the preparation techniques of amorphous alloy coatings including the above-mentioned methods has been widely studied and practically applied.

Method used

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  • Iron-based amorphous alloy powder, iron-based amorphous alloy coating and preparation method thereof
  • Iron-based amorphous alloy powder, iron-based amorphous alloy coating and preparation method thereof
  • Iron-based amorphous alloy powder, iron-based amorphous alloy coating and preparation method thereof

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Embodiment 1

[0028] The design alloy composition is Fe 49.5 Cr 15 Mo 14 Y 0.5 C 15 B 6 (at.%), the master alloy was prepared by vacuum induction melting; the amorphous alloy powder was prepared by ultra-high pressure inert gas atomization technology. Its X-ray diffraction results are as follows figure 1 shown. It shows that the alloy powder is completely amorphous.

[0029] The above-mentioned amorphous alloy powder is sieved, and the particle size of the powder for spraying is selected to be less than 45 μm. Nitrogen is used as the powder feeding gas and powder accelerating gas, the temperature is 300°C, and the nitrogen pressure is 5MPa. The X-ray diffraction results of the coating are as follows figure 2 shown. Indicates that the coating is a completely amorphous coating.

Embodiment 2

[0031] The design alloy composition is Fe 50 Cr 17.5 Mo 7 Si 3 mn 2 W 2 B 15 C 3.5(at.%), the master alloy was prepared by vacuum induction melting; the amorphous alloy powder was prepared by ultra-high pressure inert gas atomization technology. X-ray diffraction results show that the alloy powder is completely amorphous.

[0032] The above-mentioned amorphous alloy powder is sieved, and the particle size of the powder for spraying is selected to be <50 μm. Use helium as the powder feeding gas and powder accelerating gas, the temperature is 500°C, and the nitrogen pressure is 2MPa. The X-ray diffraction results of the coating show that the coating is a completely amorphous coating.

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Abstract

The invention discloses iron-based amorphous alloy powder capable of forming an amorphous alloy coating, and a method for preparing an amorphous coating. The amorphous alloy powder is taken as a raw material, and a complete amorphous coating is prepared by a cold spray method. The alloy powder mainly comprises Fe, Cr and Mo, can contain one or more of Ni, Co, Mn, Si, Re, Al, Cu, Nb, Zr, Ti, C, B and other elements, wherein Fe, Cr and Mo account for over 70 atomic percent of the alloy. The component has a wide supercooled liquid region and high amorphous forming capacity, amorphous powder can be obtained by an atomization powdering technology. In the process of preparing the amorphous alloy coating by the cold spray method, an inert gas such as nitrogen, helium and the like or a mixed gas of the nitrogen and helium is taken as a powder feeding gas and a powder accelerating gas, the temperature T of the inert gas is less than 700DEG C, and the powder feeding pressure P is 1-6MPa. The coating has a great application prospect in the fields such as wear resistance, corrosion resistance, radiation protection and the like.

Description

technical field [0001] The invention relates to an iron-based amorphous alloy composition with strong amorphous forming ability, and a technical method for preparing the amorphous alloy powder and an amorphous coating, so as to promote the performance of the iron-based amorphous alloy in wear resistance, corrosion resistance and Radiation protection and other fields, especially the engineering and even large-scale application of shell materials such as ships and storage containers. Background technique [0002] Amorphous alloy, also known as metallic glass, is a new metastable metal material; it has the structural characteristics of short-range order and long-range disorder, high strength, high hardness, high elastic modulus, high wear resistance and corrosion resistance, etc. Excellent performance, some amorphous alloys also have very excellent magnetic properties. As a new type of functional material and engineering material, amorphous alloy has broad application prospect...

Claims

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Application Information

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IPC IPC(8): C22C45/02C23C24/04
Inventor 李成栋
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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