Fabrication of Fe-based amorphous composite coating by laser cladding

Li, Chunyan; Zhai, Jianshu; Lin, Tao; Lu, Yu; Li, Xiaocheng; Kou, Shengzhong

doi:10.1016/j.jnoncrysol.2022.121648

Cited by 20 publications

(6 citation statements)

References 40 publications

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“…The higher the laser power is, the more heat will be absorbed by the coating, and the larger the HAZ will be formed. The cooling rate in HAZ is lower than the critical cooling rate required for the formation of amorphous, resulting in crystallisation of the coating [29]. From Figure 1(b) and Figure 1(c), it can be observed that the crystallisation law of the coating 2# and 3# after heat treatment is basically the same as that of the coating 1#.…”

Section: Resultsmentioning

confidence: 99%

Effects of heat treatment on microstructure and properties of Fe-based amorphous composite coatings

Zhang

Zhai

et al. 2023

Materials Science and Technology

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It is found that heat treatment can improve the microstructure and properties of the coating. In this paper, the Fe-Cr-Mo-B-C amorphous composite coatings fabricated by laser cladding technology were heat treated at different temperatures. The effects of heat treatment temperature on the crystallisation, porosity, microhardness, and corrosion resistance of coatings were investigated. The experimental results show that the amorphous content and porosity after heat treatment, the comprehensive properties are improved, and the coating defects are solved. Both the amorphous content and the porosity affect the corrosion resistance of the coatings. The smaller the porosity, the higher the amorphous content, and the stronger the corrosion resistance of the coating. When the difference in amorphous content is small, the porosity of the coating becomes the dominant factor affecting the corrosion resistance of the coating. The experimental results shows that the best optimum heat treatment temperature for the coatings is 200°C.

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Section: Resultsmentioning

confidence: 99%

Effects of heat treatment on microstructure and properties of Fe-based amorphous composite coatings

Zhang

Zhai

et al. 2023

Materials Science and Technology

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“…On this basis, the researchers discussed the effect of process parameters and heat treatment on improving the corrosion resistance of coatings. Li et al 82 studied the effects of process parameters (laser power, overlap rate) on the corrosion resistance of coatings. As shown in Fig.…”

Section: Corrosion Resistancementioning

confidence: 99%

“…Due to the large heat input of laser cladding, the coating forms a metallurgical combination with the substrate; it is necessary to reduce the heat input by regulating the laser power and scanning speed to ensure the amorphous content. Li et al 82 found that the amorphous content of FeCrMoBC amorphous coatings was 34%, 30% and 27% at laser powers of 1400, 1600 and 1800 W, respectively, and amorphous content decreased with increasing laser power. Lower laser power leads to a faster cooling rate, which is more conducive to the formation of amorphous phase.…”

Section: Process Parametersmentioning

confidence: 99%

Research Progress and Development Trend of Amorphous and Nanocrystalline Composite Coatings: A Review

Zhang¹,

Yuan

Jing³

et al. 2022

JOM

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Compared with crystal alloy, amorphous alloy features atomic arrangement of long-range disorder and near-range order; it has no crystal boundary, dislocation and other defects that can easily promote corrosion initiation and development. With good mechanical properties, wear resistance and corrosion resistance properties, today amorphous alloys have become a research hotspot worldwide. However, the amorphous formation ability is limited, which restricts large-scale preparation, popularization and application of three-dimensional block materials. Due to the technical characteristics of rapid solidification, laser cladding technology and spraying technology are beneficial to the efficient preparation and transformation of amorphous alloy in the form of coating materials. According to the current research progress of amorphous and nanocrystalline composite coatings, this article introduces the typical amorphous and nanocrystalline composite coating alloy systems, summarizes the research progress of preparing amorphous and nanocrystalline composite coatings and expounds the research situation of the main mechanical properties, wear resistance and corrosion resistance of amorphous and nanocrystalline composite coatings. Finally, the application scope of amorphous and nanocrystalline composite coatings is reviewed, and the current problems and future development trends in the study of amorphous and nanocrystalline composite coating are indicated.Zhibin Zhang and Jiachi Yuan have contributed equally to this work.

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“…Wang [23] et al enhanced the Fe-based composite coatings by ultrasonic vibration, refining the grains to enhance the wear resistance. At present, the scholars mainly studied the effects of the dilution rates and process parameters of the laser cladding on the microstructure of Fe-based amorphous alloys [24][25][26]. The research on the effect of the multi-layer LMD on APs content and corrosion resistance of the deposition bulk was rarely discussed.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, multi-phase and corrosion resistance of amorphous phase reinforced multi-layer fabricated by laser beam

Li,

2023

Phys. Scr.

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The Fe-Cr-B-Si deposited layers were prepared on the titanium alloy by the laser melting deposition (LMD) or the laser cladding (LC) technology. The microstructure of the clad layer and the deposition bulk was characterized by the scanning electron microscopy, transmission electron microscopy and electron-backscattered diffraction. The single clad layer was primarily composed of the amorphous phase (APs), the fraction of APs decreased with increasing of the LMD layer thickness due to the heat accumulation, producing the crystalline phases. Parts of the nanocrystalline phases (NPs) were produced due to the characteristics of a laser-induced pool (LIP), producing the deposition bulk with the good metallurgy bond between the adjacent laser fabricated layers. The corrosion resistance of the deposition bulk was enhanced due to the production of the oxides and hydroxides, forming a passive film to enhance the corrosion resistance.

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Fabrication of Fe-based amorphous composite coating by laser cladding

Cited by 20 publications

References 40 publications

Effects of heat treatment on microstructure and properties of Fe-based amorphous composite coatings

Effects of heat treatment on microstructure and properties of Fe-based amorphous composite coatings

Research Progress and Development Trend of Amorphous and Nanocrystalline Composite Coatings: A Review

Microstructure, multi-phase and corrosion resistance of amorphous phase reinforced multi-layer fabricated by laser beam

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