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Fe-al-cr alloy layer prepared by multi-arc ion plating + arc glow chromizing + recoil ion implantation

A multi-arc ion plating and arc glow technology, applied in the direction of ion implantation plating, metal material coating process, coating, etc. problem, to achieve the effect of uniform distribution of elements and excellent performance

Active Publication Date: 2017-09-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, Fe-Al-Cr 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 ZL201310076784.1 using double-glow plasma surface metallurgy technology and invention patent CN201410780471.9 using a combination of double-glow technology and ion implantation to prepare Fe-Al-Cr coatings, but both methods have poor surface Al. Alloying elements such as Fe, Al, and Cr in the coating 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-cr alloy layer prepared by multi-arc ion plating + arc glow chromizing + recoil ion implantation
  • Fe-al-cr alloy layer prepared by multi-arc ion plating + arc glow chromizing + recoil ion implantation
  • Fe-al-cr alloy layer prepared by multi-arc ion plating + arc glow chromizing + recoil ion implantation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Present embodiment 1 is implemented under the following implementation conditions and technical requirements:

[0026] 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.

[0027] 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 of -25V, deposition temperature of 100°C, deposition time of 20min, and deposition rate of 0.2μm / min .

[0028] Then, the outer surface of the multi-arc ion-plated Al layer obtained in the previous step is subjected to Cr infiltration treatment by using the arc-added glow technology, and the target material is 99.99% Cr. The specific process parameters selected are Ar gas pressure of 25Pa, arc current of 60A, pole spacing of 100mm,...

Embodiment 2

[0032] This embodiment 2 is implemented under the following implementation conditions and technical requirements:

[0033] First, the surface of T8 steel was ground and polished to make the surface roughness Ra reach 2 μm, and the ultrasonic time was 30 minutes.

[0034] Al was plated on the surface of T8 steel by multi-arc ion plating technology, and the target material was 99.99% Al. The specific process parameters selected are Ar gas flow rate of 35SCCM, working pressure of 0.6Pa, target source current of 60A, substrate negative bias of -35V, deposition temperature of 120°C, deposition time of 40min, and deposition rate of 0.4μm / min .

[0035] Then, the outer surface of the multi-arc ion-plated Al layer obtained in the previous step is subjected to Cr infiltration treatment by using the arc-added glow technology, and the target material is 99.99% Cr. The specific process parameters selected are Ar gas pressure of 45Pa, arc current of 80A, pole spacing of 140mm, bias volta...

Embodiment 3

[0039] This embodiment 3 is implemented under the following implementation conditions and technical requirements:

[0040] First, the surface of 304 stainless steel is ground and polished to make the surface roughness Ra reach 1 μm, and the ultrasonic time is 30 minutes.

[0041] Then use multi-arc ion plating technology to plate Al on the surface of 304 stainless steel, wherein 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 .

[0042]Then, the outer surface of the multi-arc ion-plated Al layer obtained in the previous step is subjected to Cr infiltration treatment by using the arc-added glow technology, and the target material is 99.99% Cr. The selected process parameters are Ar gas pressure of 35Pa, arc current of 70A, pole spa...

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Abstract

The invention belongs to the field of metal surface modification, and specifically relates to the preparation of a Fe-Al-Cr coating with uniform distribution of alloy elements by adopting a multi-arc ion plating technology to plate Al, arc-added glow infiltration and recoil ion implantation in combination. The specific steps are as follows: Step 1: First, pre-surface the steel surface, and then dry it after ultrasonic cleaning; Step 2: Plating Al by multi-arc ion plating technology; Step 3: Infiltrate Cr by using arc glow technology; Step 4: Recoil ion implantation 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 Cr 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 Cr and recoil ion implantation to prepare Fe-Al-Cr coating with uniform distribution of alloy elements. Background technique [0002] Fe-Al-Cr 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 parts Erosion and wear problems caused by high temperature gas and fly ash during use. So far, Fe-Al-Cr 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. envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/48C23C14/16
Inventor 姚正军罗西希张平则周克印张泽磊陈煜林玉划姚一波徐尚君周艳军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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