Study on Remote Control Underwater Welding Technology Applied in Nuclear Power Station

Gao, Hui; Jiao, Xiangdong; Zhou, Chanfeng; Qiuping, Shen; Yi, Yu

doi:10.1016/j.proeng.2011.08.927

Cited by 14 publications

(10 citation statements)

References 3 publications

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“…% Mo coating is 288.0 HV, which is about half of the microhardness of the Mo-free coating. The XRD results show that the amount of M 23 (C, B) 6 increases and the contents of M 7 (C, B) 3 decrease with the addition of the Mo element. The microstructure analyses show that the martensite decreases and the ferrite increases gradually with the increase of Mo content in the coating.…”

Section: Microstructure Analysismentioning

confidence: 98%

“…%, Mo 2 C phase appears in the coating. With the increase of Mo content, the amount of M 7 (C, B) 3 decreases gradually, and the amount of M 2 B, M 23 (C, B) 6 , and Mo 2 C gradually increases. Figure 3 shows the metallographic microstructure of the coating.…”

Section: Microstructure Analysismentioning

confidence: 98%

“…With the increase of Mo content, the phases in the coating are changed and the intensity of the diffraction peak becomes weaker. The phases in the Mo-free coating are α-Fe, M 2 B (M = Fe, Ni), M 23 (C, B) 6 , and M 7 (C, B) 3 . Another α-Fe peak appears near the main peak when Mo is added into the coating.…”

Section: Microstructure Analysismentioning

confidence: 99%

“…Dendrite 2 contains a certain amount of Cr, which can strengthen the matrix by solid solution strengthening [40]. According to the EPMA and XRD results, the content of C in the granular eutectic structure is higher, and the granular eutectic structure is therefore identified as M 23 (C, B) 6 .…”

Section: Microstructure Analysismentioning

confidence: 99%

“…Hence, surface modification technologies are necessary to improve the performance of steel parts. The coatings cladded on the surface of steels can greatly improve the service life of steel facilities in the ocean, which have a significant influence on the reliability of offshore steel components and can enhance the economic efficiency of the ocean [6].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Molybdenum on the Microstructures and Properties of Stainless Steel Coatings by Laser Cladding

et al. 2017

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Stainless steel powders with different molybdenum (Mo) contents were deposited on the substrate surface of 45 steel using a 6 kW fiber laser. The microstructure, phase, microhardness, wear properties, and corrosion resistance of coatings with different Mo contents were studied by scanning electron microscopy (SEM), electron probe microanalyzer (EPMA), X-ray diffraction (XRD), microhardness tester, wear tester, and electrochemical techniques. The results show that good metallurgical bonding was achieved between the stainless steel coating and the substrate. The amount of M 7 (C, B) 3 type borocarbide decreases and that of M 2 B and M 23 (C, B) 6 type borocarbides increases with the increase of Mo content in the coatings. The amount of martensite decreases, while the amount of ferrite gradually increases with the increase of Mo content. When the Mo content is M, Mo 2 C phase appears in the coating. The microstructure of the coating containing Mo is finer than that of the Mo-free coating. The microhardness decreases and the wear resistance of the coating gradually improves with the increase of Mo content. The wear resistance of the 6.0 wt. % Mo coating is about 3.7 times that of the Mo-free coating. With the increase of Mo content, the corrosion resistance of the coating firstly increases and then decreases. When the Mo content is 2.0 wt. %, the coating has the best corrosion resistance.

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Section: Microstructure Analysismentioning

confidence: 98%

Section: Microstructure Analysismentioning

confidence: 98%