Preparation method of anti-corrosion zirconium-based amorphous alloy composite material coating

A zirconium-based amorphous alloy and composite material technology, which is applied in the field of material science and engineering, can solve the problems of reducing the corrosion resistance of the coating, the decrease of the corrosion resistance of the coating, and the uneven composition of the coating, so as to improve the corrosion resistance , reduce the preparation cost, and reduce the effect of pore defects

Active Publication Date: 2021-06-25
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ball milling can fully mix the elemental powder, in the process of laser cladding, a large amount of heat will be released due to alloying during the melting of the elemental powder, and at the same time, the existence time of the molten pool is short, resulting in uneven coating composition
Therefore, the use of mixed powders to prepare zirconium-based amorphous alloy composite coatings often contains less amorphous phase, thereby reducing the corrosion resistance of the coating.
In addition, prefabricated powder laser cladding needs to use organic solvents such as ethanol as the powder binder, which is easy to pollute the coating, and the gap between the powders during the laser cladding process is likely to cause gas to remain in the coating to form pores, which will also cause lead to a decrease in the corrosion resistance of the coating

Method used

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  • Preparation method of anti-corrosion zirconium-based amorphous alloy composite material coating
  • Preparation method of anti-corrosion zirconium-based amorphous alloy composite material coating
  • Preparation method of anti-corrosion zirconium-based amorphous alloy composite material coating

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Embodiment 1

[0041] The preparation of zirconium-based amorphous alloy composite material coating based on vacuum induction melting gas atomized spherical amorphous powder and synchronous powder feeding includes the following steps:

[0042] Step 1: Powder preparation and mixing:

[0043]Zr, Cu, Ni and Al are mixed according to the atomic ratio Zr:Cu:Ni:Al=50.4:28:9:12.3, and 2.16kg of raw materials are selected to prepare zirconium-based amorphous alloy high-spherical preforms by vacuum induction melting gas atomization technology. For alloy powder, the initial atomizing gas pressure is 3MPa, and the alloy melt temperature is 1200°C. 1.73kg of zirconium-based amorphous alloy high-spherical pre-alloyed powder is prepared, and the powder yield is about 80%. After powder making, the powder is sieved, and the powder of 45 μm-120 μm is selected, and the powder and SiC nano powder with a diameter of 55 nm are ball milled by a ball mill for 18 minutes. The mass ratio of SiC nano powder is 5%, so...

Embodiment 2

[0049] The preparation of zirconium-based amorphous alloy composite material coating based on the induction melting gas atomization spherical amorphous powder without crucible electrode and synchronous powder feeding comprises the following steps:

[0050] Step 1: Powder preparation and mixing:

[0051] Take Zr 50.4 Cu 28 Ni 9 al 12.3 Alloy rod 2.12kg was used as the raw material, and zirconium-based amorphous alloy high-spherical pre-alloyed powder was prepared by induction melting gas atomization without crucible electrode (induction melting gas atomization without crucible electrode), and the initial atomization gas pressure was selected as 4MPa. The power supply is 40kW, the rotation speed is 6r / min, and 1.95kg zirconium-based amorphous alloy high-spherical pre-alloyed powder is prepared, and the powder yield is about 92%. After powder making, the powder is sieved, and the powder of 45 μm-120 μm is selected, and the powder and the SiC nano powder with a diameter of 200...

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Abstract

The invention belongs to the field of material science and engineering, and particularly relates to a preparation method of an anti-corrosion zirconium-based amorphous alloy composite material coating. Zr50.4Cu28Ni9Al12.3 amorphous alloy spherical pre-alloy powder is prepared through a gas atomization powder preparation technology, the surface of the spherical pre-alloy powder is evenly coated with SiC nano powder, SiC and an alloy are subjected to an in-situ reaction in the laser melting cladding process, a strengthening phase is separated out, preparation of the composite coating with the high amorphous phase content is achieved, the excellent corrosion resistance is obtained, and a new technical approach is provided for preparation of the anti-corrosion zirconium-based amorphous alloy composite material coating. According to the preparation method of the anti-corrosion zirconium-based amorphous alloy composite material coating, preparation of the composite coating with the high amorphous content can be effectively achieved, excellent corrosion resistance is obtained, and the beneficial effects of being wide in application range and low in cost are achieved.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a preparation method of a corrosion-resistant zirconium-based amorphous alloy composite material coating. Background technique [0002] Amorphous alloy has a unique amorphous structure, so it does not have defects such as dislocations and grain boundaries, so that amorphous alloys and composite materials have excellent corrosion resistance. Laser cladding is widely used because it can prepare dense coatings that are metallurgically bonded to the substrate and is suitable for various complex shapes. Zr-Cu-Ni-Al amorphous alloy has strong amorphous forming ability, excellent corrosion resistance, and does not contain toxic and harmful elements and precious metal components, so it has attracted extensive attention. [0003] In the zirconium-based amorphous alloy composite coating prepared by laser cladding, since the amorphous alloy is more likely to crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/02B22F9/04B22F9/08
CPCC23C24/103B22F9/082B22F9/04B22F2009/043B22F1/16Y02E30/30
Inventor 刘学李晋锋乐国敏罗晋如季亚奇杨晓珊周昱昭王斗
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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