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Fe-al-nb alloy layer prepared by multi-arc ion plating + arc glow niobium infiltration + recoil ion implantation

A multi-arc ion plating and arc glow technology, applied in ion implantation plating, metal material coating process, coating and other directions, can solve the problems of easy inclusion of oxides, large thermal stress at the interface, pollution of the environment, etc. To achieve the effect of uniform distribution of elements and excellent performance

Active Publication Date: 2017-11-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, Fe-Al-Nb coatings have been prepared by surface treatment technologies such as high-velocity arc spraying and supersonic arc spraying, but there are low bonding strength with the substrate, large thermal stress at the interface, easy inclusion of oxides and pollution. environmental issues
[0003] At present, there is an invention patent CN201410342568.1 that uses double-glow plasma surface metallurgy and hot-dip coating to prepare Fe-Al-Nb alloy coatings, but this method has the problem of surface Al depletion, and Fe, Al, Nb, etc. Alloying elements are distributed in a gradient rather than uniform distribution, so it is easy to cause Al to concentrate in the middle of the coating, forming a high Al brittle phase and reducing the service life of the coating

Method used

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  • Fe-al-nb alloy layer prepared by multi-arc ion plating + arc glow niobium infiltration + recoil ion implantation
  • Fe-al-nb alloy layer prepared by multi-arc ion plating + arc glow niobium infiltration + recoil ion implantation
  • Fe-al-nb alloy layer prepared by multi-arc ion plating + arc glow niobium infiltration + recoil ion implantation

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Embodiment 1

[0024] Present embodiment 1 is implemented under the following implementation conditions and technical requirements:

[0025] First, the surface of 45 steel is ground and polished to make the surface roughness Ra reach 0.5 μm, and the ultrasonic time is 30 minutes.

[0026] Then use multi-arc ion plating technology to plate Al on the surface of 45 steel, in which the target material is 99.99% Al. The specific process parameters selected are Ar gas flow rate of 25SCCM, working pressure of 0.4Pa, target source current of 50A, substrate negative bias voltage of -25V, deposition temperature of 100°C, deposition time of 20min, and deposition rate of 0.2μm / min .

[0027] Then, the outer surface of the multi-arc ion-plated Al layer obtained in the previous step is further infiltrated with Nb by using the arc glow technology, and the target material is 99.99% Nb. The specific process parameters selected are Ar gas pressure of 25Pa, arc current of 60A, pole spacing of 100mm, bias vol...

Embodiment 2

[0031] Present embodiment 1 is implemented under the following implementation conditions and technical requirements:

[0032] First, the surface of 45 steel is ground and polished to make the surface roughness Ra reach 0.5 μm, and the ultrasonic time is 30 minutes.

[0033] Then use multi-arc ion plating technology to plate Al on the surface of 45 steel, in which the target material is 99.99% Al. The specific process parameters selected are Ar gas flow rate of 30SCCM, working pressure of 0.5Pa, target source current of 55A, substrate negative bias voltage of 45V, deposition temperature of 150°C, deposition time of 30min, and deposition rate of 0.3μm / min.

[0034] Then, the outer surface of the multi-arc ion-plated Al layer obtained in the previous step is further infiltrated with Nb by using the arc glow technology, and the target material is 99.99% Nb. The selected process parameters are Ar gas pressure of 35Pa, arc current of 70A, pole spacing of 120mm, bias voltage of 700V...

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Abstract

The invention belongs to the field of metal surface modification. Specifically, it involves the combination of multi-arc ion plating technology for Al plating, arc glow infiltration of Nb and recoil ion implantation to prepare Fe-Al-Nb coatings with uniform distribution of alloying elements. The specific steps are as follows: Step 1: Firstly, carry out surface pretreatment on the surface of the steel, and then dry it after ultrasonic cleaning; Step 2: Use multi-arc ion plating technology to plate Al; Step 3: Use arc glow technology to infiltrate Nb; Step 4 : Recoil ion implantation technology is used to bombard the thin film on the surface of the material. The method of the present invention can avoid the precipitation of high Al brittle phases near the subsurface of the coating, ensure that the three alloying elements of Fe, Al, and Nb are evenly distributed along the cross-sectional direction, improve the service life of the coating, and especially improve its high temperature oxidation resistance and corrosion resistance. Friction and wear properties.

Description

technical field [0001] The invention belongs to the field of metal surface modification. Specifically, it involves the combination of multi-arc ion plating technology for Al plating, arc glow infiltration of Nb and recoil ion implantation to prepare Fe-Al-Nb coatings with uniform distribution of alloy elements. Background technique [0002] Fe-Al-Nb coating has excellent resistance to high temperature erosion and wear resistance, and the dense oxide film formed at high temperature has a protective effect on the substrate, so it can be used in petrochemical, aerospace and other fields to solve the problem of its key components Erosion and wear problems caused by high temperature gas and fly ash during use. So far, Fe-Al-Nb coatings have been prepared by surface treatment technologies such as high-velocity arc spraying and supersonic arc spraying, but there are low bonding strength with the substrate, large thermal stress at the interface, easy inclusion of oxides and polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/48C23C14/32C23C14/16
Inventor 姚正军张泽磊张平则周克印罗西希陈煜李中
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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