Effect of CoCrW and T800 Welding Wire on Microstructure and Properties of Laser Cladding Wear-Resistant Layer on DZ125 Superalloy Surface

Chen Wang; Zhenglong Lei; Wenqing Song; Shuo Yang; Xudong Li

doi:10.3788/CJL240914

Chinese Journal of Lasers, Volume. 52, Issue 4, 0402201(2025)

Effect of CoCrW and T800 Welding Wire on Microstructure and Properties of Laser Cladding Wear-Resistant Layer on DZ125 Superalloy Surface

Chen Wang¹, Zhenglong Lei^1、*, Wenqing Song², Shuo Yang², and Xudong Li¹

Author Affiliations

¹National Key Laboratory of Precision Welding ＆ Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, Heilongjiang , China

²AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, Liaoning , China

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Abstract Get PDF(in Chinese)

Figures & Tables(20)

Fig. 1. Laser wire-feeding cladding system

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Fig. 2. Cladding layer sample.(a) Metallographic sampling location; (b) wear-resistant specimen size

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Fig. 3. Macroscopic morphologies of cross sections of cladding layers. (a) CoCrW alloy; (b) T800 alloy

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Fig. 4. Macroscopic morphologies of CoCrW cladding layer. (a) Interface region; (b) near interface region; (c) surface zone

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Fig. 5. Macroscopic morphologies of T800 cladding layer. (a) Near interface region; (b) surface zone

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Fig. 6. SEM morphology of CoCrW cladding layer

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Fig. 7. XRD analysis result of CoCrW cladding layer

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Fig. 8. SEM image and EDS surface scanning results of CoCrW cladding layer. (a) SEM image; (b) EDS surface scanning results

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Fig. 9. SEM morphology of T800 cladding layer

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Fig. 10. XRD analysis result of T800 cladding layer

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Fig. 11. SEM image and EDS surface scanning results of T800 cladding layer. (a) SEM image; (b) EDS surface scanning results

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Fig. 12. Hardness distribution of cladding layer. (a) Hardness test location of cladding section; (b) cladding hardness

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Fig. 13. Friction and wear curves of CoCrW and T800 cladding layers

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Fig. 14. Wear marks of DZ125 cladding layer. (a) CoCrW cladding layer; (b) T800 cladding layer

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Table 1. Chemical compositions of base material and filament
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Table 1. Chemical compositions of base material and filament
Material Mass fraction /%
Co Cr C W Fe Mn Mo Si Ni
DZ125 9.770 8.620 0.080 6.900 — — 1.860 — Bal.
CoCrW Bal. 29.640 1.150 4.120 0.088 1.140 1.150 1.040 2.070
T800 Bal. 17.7 0.08 — 1.320 — 28.200 3.160 1.480

Table 2. Main parameters of laser fuse forming
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Table 2. Main parameters of laser fuse forming
Parameter CoCrW T800
Laser power/W 1100‒1200 800‒1000
Laser defocus amount /mm +2‒+5 +2‒+5
Argon flow rate /（L/min） 15‒20 15‒20

Table 3. EDS spot scanning results of CoCrW cladding layer
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Table 3. EDS spot scanning results of CoCrW cladding layer
Point Mass fraction /%
Ni Co Mo W Cr C
A 17.40 49.44 1.38 5.27 20.38 6.13
B 8.83 29.37 4.20 20.32 19.72 17.56
C 6.00 16.72 4.99 25.96 25.97 20.35
D 6.18 25.49 1.55 6.14 49.59 11.05

Table 4. EDS test results in T800 cladding layer
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Table 4. EDS test results in T800 cladding layer
Point Mass fraction /%
Ni Co Mo W Cr C
$A'$ 29.03 13.87 26.95 1.47 9.45 19.23
$B'$ 33.51 19.12 22.94 4.00 11.30 9.13
$C'$ 28.41 16.82 28.27 5.50 10.42 10.58
$D'$ 50.72 21.09 9.36 1.62 11.32 5.88

Table 5. Hardness values of CoCrW and T800 cladding layers
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Table 5. Hardness values of CoCrW and T800 cladding layers
Sample Substrate hardness /HV Columnar zone hardness /HV Equiaxed zone hardness /HV
CoCrW 425.10 451.10 461.06 490.60 513.80 529.30 540.80 546.56 562.40
T800 420.20 432.10 444.00 469.45 474.77 472.84 489.81 485.24 479.76

Table 6. Weight loss values of cladding layer and substrate before and after wear
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Table 6. Weight loss values of cladding layer and substrate before and after wear
Sample Pre-test weight /g Post-test weight /g Weight loss /mg Mean weightloss /mg
CoCrW 15.1765 15.1731 3.4 3.4
15.0628 15.0594 3.4
T800 15.5682 15.5652 3.6 3.65
15.3963 15.3926 3.7

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Chen Wang, Zhenglong Lei, Wenqing Song, Shuo Yang, Xudong Li. Effect of CoCrW and T800 Welding Wire on Microstructure and Properties of Laser Cladding Wear-Resistant Layer on DZ125 Superalloy Surface[J]. Chinese Journal of Lasers, 2025, 52(4): 0402201

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