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Effects of B content on wear and corrosion resistance of laser-cladded Co-based alloy coatings

Rong Xia
Rong Xia
, 
Kun Zhang
Kun Zhang
, 
Fengyuan Shu
Fengyuan Shu
, 
Xin Zhang
Xin Zhang
, 
Liying Yan
Liying Yan
 and 
Cheng Li
Cheng Li
   | Apr 02, 2024
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Published Online: Apr 02, 2024
Page range: 13 - 23
Received: Dec 11, 2023
Accepted: Jan 25, 2024
DOI: https://doi.org/10.2478/msp-2023-0040
Keywords
© 2023 Rong Xia et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

The morphology and the XRD test results of the CoCrFeNiSiB4 powder: (a) SEM image, (b) XRD test result [42]
The morphology and the XRD test results of the CoCrFeNiSiB4 powder: (a) SEM image, (b) XRD test result [42]

Fig. 2.

XRD spectrum of specimens
XRD spectrum of specimens

Fig. 3.

SEM image of the B0 coating: (a) cross sectional morphology of the coating, (b) magnification of rectangular region B, (c) magnification of rectangular region C, (d) magnification of rectangular region D
SEM image of the B0 coating: (a) cross sectional morphology of the coating, (b) magnification of rectangular region B, (c) magnification of rectangular region C, (d) magnification of rectangular region D

Fig. 4.

Microstructure of the coatings: (a) B0, (b) B4, (c) B6, (d) B8, (e) B12, (f) B16
Microstructure of the coatings: (a) B0, (b) B4, (c) B6, (d) B8, (e) B12, (f) B16

Fig. 5.

SEM images and EDS elemental distribution maps of B6 coating
SEM images and EDS elemental distribution maps of B6 coating

Fig. 6.

TEM image of the B6 coating: (a) the bright field TEM image, (b) the enlarged morphology of the amorphous phase and crystalline phase boundary in (a)
TEM image of the B6 coating: (a) the bright field TEM image, (b) the enlarged morphology of the amorphous phase and crystalline phase boundary in (a)

Fig. 7.

Cross-section microhardness curves of (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings
Cross-section microhardness curves of (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings

Fig. 8.

Friction coefficient curves of the (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings
Friction coefficient curves of the (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings

Fig. 9.

Wear loss of the (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings and substrate
Wear loss of the (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings and substrate

Fig. 10.

Wear morphology surface of the coatings: (a) B0, (b) B4, (c) B6, (d) B8, (e) B12, (f) B16
Wear morphology surface of the coatings: (a) B0, (b) B4, (c) B6, (d) B8, (e) B12, (f) B16

Fig. 11.

Polarization curves of (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings
Polarization curves of (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings

Theoretical amorphous content of specimens

Sample B0 B4 B6 B8 B12 B16
Content (%) 2.46 35.65 68.86 22.31 10.55 0.97

EDS analysis in Fig. 9 (wt%)

Ti Cr Fe Co Ni O
A 64.41 1.26 2.78 4.89 5.33 21.33
B 67.22 4.30 1.24 5.95 7.61 13.69

Chemical composition of TC4

Element Fe C N H O Al V Si Ti
wt% 0.30 0.10 0.05 0.01 0.20 5.5–6.8 3.5–4.5 0.15 Bal.

The electrochemical parameters of (Co34Fe8Cr29Ni8Si7)100–xBx alloy coatings in 3.5 wt% NaCl

Sample Ecorr/mV Icorr/(A·cm–2)
B0 –482.034 8.974×10–5
B4 –419.289 5.846×10–5
B6 –380.255 7.096×10–5
B8 –501.733 8.318× 10–5
B12 –449.567 8.851 × 10–5
B16 –436.434 8.337 × 10–5

The marked numbers and nominal components of the samples

Sample number Powder(wt%)
B0 Co34Fe8Cr29Ni8Si7
B4 (Co34Fe8Cr29Ni8Si7)96B4
B6 (Co34Fe8Cr29Ni8Si7)94B6
B8 (Co34Fe8Cr29Ni8Si7)92B8
B12 (Co34Fe8Cr29Ni8Si7)88B12
B16 (Co34Fe8Cr29Ni8Si7)84B16
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