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Zirconium alloy pipe surface treatment method and device

A surface treatment, zirconium alloy technology, applied in metal material coating process, ion implantation plating, coating, etc., can solve problems such as high melting point of chromium, decline in mechanical properties of zirconium alloy, corrosion, etc., to improve corrosion resistance, The effect of improving density

Inactive Publication Date: 2019-08-16
山东产研强远激光科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Chromium has extremely strong corrosion resistance, so coating chromium on the surface of zirconium alloy pipes can greatly improve its corrosion resistance, but the melting point of chromium is relatively high, and the mechanical properties of zirconium alloys decrease significantly at high temperatures, so metallurgical methods are not suitable for The combination of two materials, based on this, the two can achieve a higher bonding strength through the magnetron sputtering method
[0006] The study found that at a certain sputtering rate, the chromium film prepared by the magnetron sputtering method on the surface of the zirconium alloy tube has a certain porosity, and these pores are easy to become the source of pitting corrosion and cause further more serious corrosion, resulting in Zirconium alloy tubes have poor corrosion resistance

Method used

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Effect test

Embodiment 1

[0036] The zirconium alloy pipe surface treatment method provided in this embodiment comprises the following steps:

[0037] Magnetron sputtering coating step: using magnetron sputtering to plate chromium on the surface of the zirconium alloy pipe 3 to form a chromium film with a preset thickness;

[0038] Laser melting step: performing laser melting treatment on the chromium film.

[0039] Using the magnetron sputtering method, the chromium is combined with the surface of the zirconium alloy pipe 3 in a high-strength manner, and at the same time, the chromium film has a certain degree of compactness. Melting and high-speed cooling further improve the compactness of the chromium film and prevent its corrosion resistance from being affected by a small amount of pores. Combining the magnetron sputtering coating method with the laser melting technology, a dense corrosion-resistant chromium layer is formed on the surface of the zirconium alloy pipe 3, which greatly improves the c...

Embodiment 2

[0046] The zirconium alloy pipe surface treatment device provided in this embodiment, such as Figure 1 to Figure 2 As shown, it includes a magnetron sputtering coating device, a laser melting device, a vacuum device 4 and an inert gas filling device 5;

[0047] The magnetron sputtering coating device includes a cavity, and the vacuum device 4 and the inert gas filling device 5 are respectively communicated with the cavity;

[0048] The laser melting device includes a laser processing head 8 , and the inert gas filling device 5 is also used for filling inert gas into the pipe processed by the laser processing head 8 .

[0049] Wherein, the zirconium alloy pipe material 3 is arranged in the cavity, and the magnetron sputtering coating device can coat the surface of the zirconium alloy pipe material 3 .

[0050] The laser processing head 8 can remelt and cool the coating film on the surface of the zirconium alloy pipe 3 at a high speed, and the inert gas filling device 5 can fi...

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Abstract

The invention relates to the technical field of laser processing, and particularly discloses a zirconium alloy pipe surface treatment method and device. The zirconium alloy pipe surface treatment method is characterized by comprising the following steps that (1) magnetron sputtering coating is carried out, wherein a magnetron sputtering method is used for plating chromium on the zirconium alloy pipe surface to form a chromium film with the predetermined thickness; and (2) laser fusing is carried out, wherein laser fusing treatment is carried out on the chromium film. According to the zirconiumalloy pipe surface treatment method and device, a magnetron sputtering coating method and a laser fusing technology are combined to form a dense corrosion-resistant chromium layer on the zirconium alloy pipe surface, the corrosion resistance of a zirconium alloy pipe in the working condition of a nuclear power plant is greatly improved, and the advanced technology is achieved.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of laser processing, in particular to a surface treatment method and device for a zirconium alloy pipe. [0003] (2) Background technology [0004] Zirconium alloys have a series of characteristics such as low density, high specific strength, corrosion resistance, excellent processing performance, and low thermal neutron absorption cross section, so they are widely used in the nuclear industry. Although zirconium alloys have good corrosion resistance, they face very harsh corrosion environments in nuclear power plants, and most zirconium alloy tubes still cannot meet the long-term service requirements. Therefore, coating more corrosion-resistant materials on its surface has also become a research hotspot. [0005] Chromium has extremely strong corrosion resistance, so coating chromium on the surface of zirconium alloy pipes can greatly improve its corrosion resistance, but the melting point of chr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/58
CPCC23C14/165C23C14/35C23C14/5813
Inventor 王文涛何建群王靖雯成巍马新强任远
Owner 山东产研强远激光科技有限公司
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