Journal of Jilin University(Engineering and Technology Edition) ›› 2026, Vol. 56 ›› Issue (7): 1825-1833.doi: 10.13229/j.cnki.jdxbgxb.20251045

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Microstructure and tribological properties of Mo2C particle reinforced CoCrFeNiMn high entropy alloy composite coating prepared by induction cladding

Ji-bo LIU1(),Zi-xia CHEN2,Yong-liang LI1,Chao MENG2,Zhen-song LIAN1()   

  1. 1.Weichai（Weifang） Material Forming & Manufacturing Center Co. ，Ltd. ，Weifang 261100，China
    2.School of Materials Science and Engineering，Liaoning Technical University，Fuxin 123000，China
  • Received:2025-09-26 Online:2026-07-01 Published:2026-08-12
  • Contact: Zhen-song LIAN E-mail:liujib@weichai.com;lianzs@weichai.com

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Abstract:

In this study， Mo2C/CoCrFeNiMn high-entropy alloy composite coating was successfully prepared for the first time by induction cladding technology. The effects of Mo2C particles on the phase composition， microstructure， microhardness， room temperature and high temperature wear properties of the composite coating were studied. The results show that in addition to the FCC phase， there are Mo2C phase and precipitated carbide phase in the composite coating. The addition of Mo2C particles has the effect of grain refinement， second phase strengthening and solid solution strengthening. At the same time， it also promotes the formation of small angle grain boundaries and geometric necessary dislocations， and improves the microhardness of the coating. The mechanical mixed layer （MML） formed on the worn surface at room temperature and the oxidized enamel layer formed on the worn surface at 600 ℃ play a physical barrier role， which enhances the wear resistance of the coating.

Key words: high entropy alloy, induction cladding, coating, Mo2C, wear resistance

CLC Number: 

  • TG174.4

Fig.1

XRD pattern of each coating and local amplification of main diffraction peak"

Fig.2

Cross-sectional morphology of each coating"

Table 1

Point scan results of different regions in Fig.2 （at%）"

PositionCrMnFeCoNiMoC
A118.1417.9424.9019.7219.30--
A218.2818.0225.3419.1319.23--
B116.5217.4424.6918.6618.324.37-
B26.573.1811.796.144.5624.6943.07
B313.2110.3912.585.375.236.5246.7
C111.2414.6536.8315.8216.904.56-
C24.422.2717.013.963.4025.4343.51
C311.517.3616.563.222.9711.5646.82

Fig.3

EBSD analysis of C0 and C50 coatings"

Fig.4

Average microhardness of each coating"

Fig.5

Friction coefficient curves of each coating at room temperature and 600 °C high temperature"

Fig.6

Average friction coefficient and wear mass loss of each coating at room temperature and 600 °C"

Fig.7

Wear morphology of each coating at room temperature and 600 ℃ high temperature"

Table 2

Point scanning results of wear surface at room temperature and 600 °C high temperature （at%）"

PositionCrMnFeCoNiMoWO
P114.1715.1310.3611.4210.79-0.1837.95
P211.2611.7810.7910.7310.224.670.4640.09
P39.169.9212.839.418.725.790.5843.59
P47.788.236.896.756.88-1.7461.73
P55.496.475.076.596.176.481.8061.93
P64.234.527.664.914.759.291.8662.78
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