Laser & Optoelectronics Progress, Volume. 61, Issue 9, 0914008(2024)
Microstructure Evolution and Properties of WC/Ni Based Coating on the Surface of 12CrMoV Alloy Steel by Laser Cladding
Figures & Tables(14)
Fig. 1. Single channel morphologies of different coating samples. (a) W10; (b) W20; (c) W30
Fig. 4. Microstructures of WC/Ni based coatings. (a) (b) W10 coating; (c) (d) W20 coating; (e) (f) W30 coating
Fig. 5. Mechanical properties of WC/Ni based coatings. (a) Microhardness; (b) COF; (c) average COF; (d) wear volume
Fig. 6. Wear morphologies of WC/Ni based coatings. (a) W10 coating; (b) W20 coating; (c) W30 coating; (d) mapping of Fig.6(b)
Fig. 9. Nyquist and Bode plots of WC/Ni based coatings. (a) Nyquist plot; (b) Bode plot
Table 1. Chemical composition of Ni60 and 12CrMoV
View tableTable 1. Chemical composition of Ni60 and 12CrMoV
Material Atomic fraction /% C B Si Fe Cr Ni Mo V P S Cu 12CrMoV 0.08~0.15 — 0.17~0.37 Bal. 0.90~1.20 — 0.25~0.35 0.15~0.30 ≤0.35 ≤0.35 ≤0.25 Ni60 0.70~1.10 3.00~4.00 3.50~5.00 ≤5 15.00~17.00 Bal. — — — — —
Table 2. Element proportion of phase
View tableTable 2. Element proportion of phase
Area Atomic fraction /% C Fe Cr Ni S W A 22.17 16.30 18.15 9.46 — 33.92 B 9.06 24.32 22.83 37.28 — 6.51 C 14.69 30.80 30.20 8.44 0.77 8.75
Table 3. Average grain size of W10，W20，W30
View tableTable 3. Average grain size of W10，W20，W30
Sample Average grain size Equiaxed grain Columnar grain W10 6.38（±0.41） 11.32（±0.27） W20 4.35（±0.32） 9.63（±0.25） W30 4.17（±0.12） 9.21（±0.41）
Table 4. Electrochemical parameters obtained by Tafel empirical law and polarization curves
View tableTable 4. Electrochemical parameters obtained by Tafel empirical law and polarization curves
Sample Electrochemical parameter Ecorr vs. SCE（saturated calomel electrode）/V Icorr /（10-5 A/cm2） W10 -0.742 18.60 W20 -0.878 3.65 W30 -0.755 5.28
Table 5. Equivalent circuit fitting results
View tableTable 5. Equivalent circuit fitting results
Sample Rs /（Ω·cm2） Qf /（Ω-1·Sn·cm-2） n1 Rf /（Ω·cm2） Qdl /（Ω-1·Sn·cm-2） n2 Rct /（Ω·cm2） W10 4.543 1.884×10-4 0.6902 6.170 6.699×10-4 0.7120 6828 W20 4.722 3.625×10-4 0.6604 16.930 9.648×10-5 0.8856 7782 W30 4.954 1.318×10-4 0.6388 7.048 4.590×10-4 0.7003 7249
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Jitai Han, Qingfeng Xia, Keqing Wang, Guoxiang Hua. Microstructure Evolution and Properties of WC/Ni Based Coating on the Surface of 12CrMoV Alloy Steel by Laser Cladding[J]. Laser & Optoelectronics Progress, 2024, 61(9): 0914008
Paper Information
Category: Lasers and Laser Optics
Received: May. 24, 2023
Accepted: Jun. 25, 2023
Published Online: May. 6, 2024
The Author Email: Qingfeng Xia (860085@cwxu.edu.cn)
CSTR:32186.14.LOP231364
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