Preparation and Tribological Properties of Fe-based Wear-Resistant Coating by Laser Cladding

Fig. 1. Properties of Fe-based alloy powder. (a) Micro-morphology of powder; (b) magnified view of powder morphology; (c) particle size distribution; (d) XRD pattern

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Fig. 2. Microstructures of laser cladding coating. (a) Surface; (b)cross section

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Fig. 3. EDS element distributions on surface of laser cladding coating. (a) Magnified view of coating surface; (b) scanning area; distributions of (c) Fe，(d)Cr，(e)C，(f)Ni，(g)Mo, and (h)Si elements

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Fig. 4. EDS line scanning image at laser cladding bonding interface. (a) Scanning area; distributions of (b) Fe，(c)Cr，(d)Si，(e)Ni, and (f)C elements

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$X-ray diffraction pattern of Fe-based coating$

Fig. 5. X-ray diffraction pattern of Fe-based coating

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Fig. 6. Microhardnesses of coating and substrate

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Fig. 7. Friction and wear test results of substrate and coating. (a) Coefficient of friction; (b) wear rate

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Fig. 8. Test results of wear tracks. (a) 3D image of substrate; (b) wear width of substrate; (c) wear depth of substrate; (d) 3D image of coating; (e) wear width of coating; (f) wear depth of coating

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Fig. 9. Wear morphologies

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Table 1. Chemical compositions of 27SiMn steel
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Table 1. Chemical compositions of 27SiMn steel
Element C Si Mn P S Cu Cr Ni Mo Fe
Mass fraction /% 0.24－0.32 1.10－1.40 1.10－1.40 ≤0.03 ≤0.03 ≤0.30 ≤0.30 ≤0.30 ≤0.10 Bal.

Table 2. Chemical compositions of Fe-based alloy powder
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Table 2. Chemical compositions of Fe-based alloy powder
Element Cr C Ni Mo Si Nb Mn V Fe
Mass fraction /% 19.97 0.19 2.35 1.68 0.41 0.43 0.28 0.07 74.62

Table 3. Element distributions on laser cladding surface
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Table 3. Element distributions on laser cladding surface
Element Fe Cr C Ni Mo Mn Si Nb
Mass fraction /% 69.49 17.89 7.66 2.11 1.20 0.47 0.82 0.36

Table 4. Wear results of substrate and coating

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Table 4. Wear results of substrate and coating

Sample	Width of wear track /mm	Depth of wear track /mm	Wear volume /mm³	Wear rate /(mm³·N^－1·m^－1)	Maximum coefficient of friction	Average coefficient of friction
Substrate	0.870	27.664	120.00×10^－4	70.800×10^－7	0.4666	0.3344
Coating	0.456	1.410	2.77×10^－4	1.634×10^－7	0.4055	0.3265

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Cheng Wang, Wei Wang, Shijie Ding, Penghui Gong, Yuan Gao. Preparation and Tribological Properties of Fe-based Wear-Resistant Coating by Laser Cladding[J]. Chinese Journal of Lasers, 2022, 49(22): 2202011

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