Chinese Journal of Lasers, Volume. 51, Issue 20, 2002209(2024)
Effect of Mo and Ni on Impact Toughness and Wear Resistance of Fe90 Cladding Layer on Cr12MoV Roller Surface
Figures & Tables(16)
Fig. 1. Preparation schematics of laser cladding layer and impact samples. (a) Preparation process of Fe90 cladding layer on the roller surface; (b) preparation process of impact test samples
Fig. 2. Macroscopic surfaces morphology, crack detection results and sections images of different cladding surfaces. (a)‒(c) Surface macroscopic morphology; (d)(f)(h) crack detection results; (e)(g)(i) sectional images, where figures 1 and 2 show longitudinal sections and figures 3 and 4 show cross-sections
Fig. 3. XRD spectra and microstrain values of different cladding layers. (a) XRD spectra; (b) local amplification of XRD spectra;
Fig. 4. Microstructures of different cladding layers at the top, middle and bottom regions
Fig. 5. EDS map scanning of typical microstructure in different cladding layers. (a) Fe90; (b) Fe90+2%Mo; (c) Fe90+2%Mo+1%Ni
Fig. 6. Elemental segregation ratio of typical microstructure areas in the middle of different cladding layers
Fig. 7. Cross-section hardness and average hardness of different cladding layers. (a) Cross-section hardness of different cladding layers; (b) average cross-section hardness of different cladding layers
Fig. 8. Fracture images of the matrix and cladding layers. (a)‒(c) Matrix; (d)‒(f) Fe90; (g)‒(i) Fe90+2%Mo; (j)‒(l) Fe90+2%Mo+1%Ni
Fig. 10. Friction and wear properties of different cladding layers. (a) Friction coefficient; (b) wear loss; (c) wear profile; (d) wear rate
Fig. 11. Micro-morphology of different cladding layers and matrix wear traces. (a)‒(c) Matrix; (d)‒(f) Fe90; (g)‒(i) Fe90+2%Mo;
Fig. 12. Wear mechanisms of different cladding layers. (a) Wear testing schematic; (b) Fe90; (c) Fe90+2%Mo; (d) Fe90+2%Mo+1%Ni
Table 1. Chemical composition of the matrix and different cladding materials
View tableTable 1. Chemical composition of the matrix and different cladding materials
Material Mass fraction /% C Si Mn Cr Mo Ni V B Fe Roller 1.45‒1.7 ≤0.4 ≤0.4 11‒12.5 0.4‒0.6 0.15‒0.3 Bal. Fe90 0.15 1.0 0.97 13.5 1.6 Bal. Fe90+2%Mo 0.144 0.96 0.93 12.96 2 1.54 Bal. Fe90+2%Mo+1%Ni 0.141 0.94 0.91 12.69 2 1 1.5 Bal.
Table 2. Process parameters of laser cladding
View tableTable 2. Process parameters of laser cladding
Parameter Value Power /kW 0.6 Scanning speed /（mm/s） 2.5 Powder feeding /（g/min） 5.3 Shielding gas pressure /Pa 10 Spot diameter /mm 1.4
Table 3. Average grain size in the middle of the cladding layers
View tableTable 3. Average grain size in the middle of the cladding layers
Cladding layer n SE G /
μm
t95%
（v）
95%
CI /%
ξRA /
%
Fe90 11 0.573 5.47 2.228 1.277 9.32 Fe90+2%Mo 8 0.666 4.39 2.365 1.575 9.21 Fe90+2%Mo+1%Ni 9 0.573 5.28 2.306 1.321 9.3
Table 4. Average contents of Cr, Fe, Si, Mo and Ni intra- and inter-crystals
View tableTable 4. Average contents of Cr, Fe, Si, Mo and Ni intra- and inter-crystals
Cladding layer and position Atomic fraction /% Cr Fe Si Mo Ni Fe90， position 1 in Fig.5 （a）8.45 59.75 0.870 Fe90， position 2 in Fig.5 （a）11.67 51.36 0.630 Fe90+2%Mo， position 1 in Fig.5 （b）10.61 62.30 1.037 0.66 Fe90+2%Mo， position 2 in Fig.5 （b）20.93 55.17 0.480 1.28 Fe90+2%Mo+1%Ni， position 1 in Fig.5 （c）10.93 69.05 0.895 0.59 0.20 Fe90+2%Mo+1%Ni， position 2 in Fig.5 （c）14.3 58.92 0.610 3.48 0.73
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Renren Yang, Lipei Liu, Yinghua Lin, Longsheng Peng, Xinlin Wang. Effect of Mo and Ni on Impact Toughness and Wear Resistance of Fe90 Cladding Layer on Cr12MoV Roller Surface[J]. Chinese Journal of Lasers, 2024, 51(20): 2002209
Paper Information
Category: Laser Surface Machining
Received: Nov. 14, 2023
Accepted: Jan. 23, 2024
Published Online: Oct. 13, 2024
The Author Email: Lin Yinghua (lyh351258@163.com)
CSTR:32183.14.CJL231402
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