Properties of Surface Laser Cladding H13/NiCr-Cr<sub>3</sub>C<sub>2</sub> Composite Powder Cladding Layer

Hongbo Li; Qiangqiang Gao; Kangying Li; Ban Li

doi:10.3788/CJL202148.1802017

Chinese Journal of Lasers, Volume. 48, Issue 18, 1802017(2021)

Properties of Surface Laser Cladding H13/NiCr-Cr₃C₂ Composite Powder Cladding Layer

Hongbo Li^1、*, Qiangqiang Gao¹, Kangying Li², and Ban Li²

¹Key Laboratory of Advanced Forming Technology and Science of Ministry of Education, Yanshan University, Qinhuangdao, Hebei 0 66004, China

²College of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 0 66004, China

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Figures & Tables(18)

Fig. 1. Micromorphology of different powders. (a) H13; (b) NiCr-Cr₃C₂

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Fig. 2. Macroscopic morphology of cladding layer surface. (a) sample No. 1; (b) sample No. 2; (c) sample No. 3; (d) sample No. 4; (e) sample No. 5; (f) sample No. 6

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Fig. 3. Metallographic structure of cladding layer.(a) Low power; (b) high power

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Fig. 4. Scanned images of cross section of cladding layer

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$X-ray diffraction pattern of cladding layer surface. (a) Mixed powder; (b) cladding layer$

Fig. 5. X-ray diffraction pattern of cladding layer surface. (a) Mixed powder; (b) cladding layer

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Fig. 6. Surface micromorphology of No. 1 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 7. Surface micromorphology of No. 2 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 8. Surface micromorphology of No. 3 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 9. Surface micromorphology of No. 4 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 10. Surface micromorphology of No. 5 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 11. Surface micromorphology of No. 6 sample after thermal fatigue test. (a) Thermal fatigue 5 times; (b) thermal fatigue 25 times; (c) thermal fatigue 35 times

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Fig. 12. Microhardness of cladding sample. (a) Surface of sample cladding layer; (b) cross section of cladding layer

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Fig. 13. Comparison of wear depth between matrix and cladding layer

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Table 1. Physical properties of common ceramic phases and H13
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Table 1. Physical properties of common ceramic phases and H13
Material Density /(g·cm^-3) Melting point /℃ Thermal expansion coefficient /(10^-6 K^-1)
Cr₃C₂ 6.68 1890 10.3
TiC 4.93 3147 7.4
WC 15.70 2776 5.2--7.3
H13 7.80 1427 12.4

Table 2. Chemical composition of H13 powder unit: %
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Table 2. Chemical composition of H13 powder unit: %
C Si Mn Cr Mo V O Fe
0.36 1.00 0.36 4.91 1.47 0.60 0.36 1.00

Table 3. Chemical composition of NiCr-Cr₃C₂ powder unit: %
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Table 3. Chemical composition of NiCr-Cr₃C₂ powder unit: %
NiCr Cr₃C₂ Impurity
25 75 ≤0.1

Table 4. Powder ratio scheme and cladding process parameters

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Table 4. Powder ratio scheme and cladding process parameters

Number	Powder ratio	Laser power /kW	Scanning speed /(mm·s^-1)	Defocusingamount /mm	Overlap /mm
1	95%H13+5%NiCr-Cr₃C₂	1800	10	30	1.5
2	90%H13+10%NiCr-Cr₃C₂
3	85%H13+15%NiCr-Cr₃C₂
4	80%H13+20%NiCr-Cr₃C₂
5	75%H13+25%NiCr-Cr₃C₂
6	70%H13+30%NiCr-Cr₃C₂

Table 5. High temperature friction and wear test scheme for matrix and cladding layer
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Table 5. High temperature friction and wear test scheme for matrix and cladding layer
Test number Load /N Temperature /℃
1 620 490
2 620 360
3 340 490
4 340 360
5 640 425
6 320 425
7 480 500
8 480 350
9 480 425
10 480 425
11 480 425

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Hongbo Li, Qiangqiang Gao, Kangying Li, Ban Li. Properties of Surface Laser Cladding H13/NiCr-Cr₃C₂ Composite Powder Cladding Layer[J]. Chinese Journal of Lasers, 2021, 48(18): 1802017

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