Microstructure and Properties Improvement of TiC/Inconel 625 Composite Coatings Using Extreme High-Speed Laser Cladding

Tong Ge; Lan Chen; Pengfei Gu; Xundong Ren

doi:10.3788/LOP220475

Laser & Optoelectronics Progress, Volume. 60, Issue 5, 0514002(2023)

Microstructure and Properties Improvement of TiC/Inconel 625 Composite Coatings Using Extreme High-Speed Laser Cladding

Tong Ge, Lan Chen, Pengfei Gu, and Xundong Ren^*

Author Affiliations

School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu , China

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Figures & Tables(13)

Fig. 1. TiC/Inconel 625 mixed powder. (a) SEM image; (b) high magnification SEM image of surface; (c) particle size distribution

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Fig. 2. Morphologies of coating. (a) CLA coating; (b) EHLA coating

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Fig. 3. SEM images of CLA and EHLA section microstructure. (a) Bottom area; (b) middle area; (c) top area

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Fig. 4. Characterization of the white particles. (a) SEM image; (b) EDS analysis

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Fig. 5. XRD pattern of CLA and EHLA coatings

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$Corrosion resistance of CLA and EHLA coatings in mass fraction 3.5% NaCl solution. (a) Polarization curve; (b) Nyquist diagram; (c) (d) Bode diagrams$

Fig. 6. Corrosion resistance of CLA and EHLA coatings in mass fraction 3.5% NaCl solution. (a) Polarization curve; (b) Nyquist diagram; (c) (d) Bode diagrams

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Fig. 7. Equivalent circuit for impedance fitting of CLA and EHLA coatings

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Fig. 8. Friction coefficient of CLA and EHLA coatings

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Fig. 9. Wear morphologies of CLA and EHLA coatings. (a) Full picture; (b) partial enlarged drawing

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Fig. 10. Wear depth characterization of coatings. (a) CLA; (b) EHLA

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Table 1. Conventional and extreme high-speed laser cladding process parameters
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Table 1. Conventional and extreme high-speed laser cladding process parameters
Sample Laser power /W Cladding speed /（m·min^-1） Powder feeding rate /（g·min^-1） Overlap rate /%
CLA 1200 1.8 0.8 50
EHLA 3600 98.2 3.2 80

Table 2. Electrochemical parameters of CLA and EHLA coating
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Table 2. Electrochemical parameters of CLA and EHLA coating
Sample E_corr /V I_corr /（μA·cm^-2）
CLA -0.512（ $\pm$ 0.011） 2.472（ $\pm$ 0.079）
EHLA -0.404（ $\pm$ 0.008） 1.372（ $\pm$ 0.071）

Table 3. Impedance fitting data of CLA and EHLA coatings
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Table 3. Impedance fitting data of CLA and EHLA coatings
Sample R_S /（Ω·cm²） R_L /（Ω·cm²） CPE_L R_ct /（Ω·cm²） CPE_dl
Y /（μF·cm^-2） n Y /（μF·cm^-2） n
CLA 5.157 3.819 3.96 0.889 2.096×10⁵ 31.290 0.881
EHLA 4.845 128.000 24.23 0.803 4.732×10⁵ 7.741 0.936

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Tong Ge, Lan Chen, Pengfei Gu, Xundong Ren. Microstructure and Properties Improvement of TiC/Inconel 625 Composite Coatings Using Extreme High-Speed Laser Cladding[J]. Laser & Optoelectronics Progress, 2023, 60(5): 0514002

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