The Effect of Laser Scanning Speed on Microstructure and Performance of Cr3C2-NiCr Cermet Fabricated by in-situ Laser Cladding

Lou, Deyuan; Yang, Shaokun; Mei, Sheng; Liu, Qing; Cheng, Jue; Yang, Qibiao; Liu, Dun; He, Chao

doi:10.5755/j02.ms.23557

Cited by 2 publications

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“…The Cr 3 C 2 -NiCr cermet coating is prepared by wrapping Cr 3 C 2 with NiCr, which greatly improves the mechanical properties of the material. The hardness of the Cr 3 C 2 hard phase and the toughness of the NiCr adhesive phase are both improved [21].…”

Section: Introductionmentioning

confidence: 99%

“…The cooling rate determined by the laser beam scan speed had an additional effect in reducing the carbide content in laser clad layers. Lou et al [21] studied the microstructure and formation mechanism of a laser cladding cermet layer, and they found that the laser scanning velocity had a significant effect on carbide content. The solidification rate of the metal molten pool increased, while the size of carbides decreased with the increase in the scanning speed.…”

Section: Introductionmentioning

confidence: 99%

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Preparation, Microstructure, and Interface Quality of Cr3C2-NiCr Cladding Layer on the Surface of Q235 Steel

et al. 2023

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In this study, a Cr3C2-NiCr cermet cladding layer was prepared on the surface of Q235 steel via a high-speed laser cladding method. The effects of laser power, scanning speed, and overlap rate on the microstructure, cladding quality, and interfacial elements diffusion of Cr3C2-NiCr/Q235 steel were studied. The results show that there was an obvious transition layer at the interface of the Cr3C2-NiCr cladding layer and Q235 steel, indicating that the Cr3C2-NiCr cladding layer had an adequate metallurgical bond with the matrix. Fe, Cr, and Ni were diffused distinctly between the cladding layer and the matrix. The height and width of the Cr3C2-NiCr cladding layer increased, while the dilution rate decreased with the increase in the laser power. The maximum thickness of the transition layer was about 50 μm for the 6 mm/s sample, the weld heat affected zone was smaller, and it was shown that the productivity can be effectively improved. The sample with a 40% overlap rate exhibited the best flatness. The optimal laser power, scanning speed, and overlap rate of the Cr3C2-NiCr/Q235 steel were 1500 W, 6 mm/s, and 40%, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation, Microstructure, and Interface Quality of Cr3C2-NiCr Cladding Layer on the Surface of Q235 Steel

et al. 2023

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“…To solve these problems, laser cladding Ni60 composite coating can significantly improve the wear resistance of the substrate material surface to meet the performance requirements of the material surface [5,6]. Nevertheless, high stress and cracks are generated in the cladding layer due to the rapid cooling and heating of laser cladding [7,8]. Due to the characteristics of rare earth grain refinement to inhibit cracking, it has been successfully applied in the field of laser cladding [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Thermal Treatment on Microstructure and Wear Properties of Ni60/CeO2 Composite Coating 35CrMoV Steel by Laser Cladding

Bai

et al. 2022

Coatings

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Laser cladding Ni60/2.0 wt.%CeO2 self-lubricating anti-wear composite coatings on 35CrMoV steel were thermally treated at 25 °C, 500 °C, 600 °C and 700 °C for 1 h, respectively. The macroscopic morphology of composite coatings was characterized by optical microscopy. The evolution of microstructure was studied by scanning electron microscopy. The precipitated phase of the coating was analyzed by X-ray diffractometer. The microhardness and wear properties of the composite coatings were measured by microhardness tester and friction and wear test. The effects of thermal treatment and no thermal treatment on the mechanical properties of the composite coatings were systematically studied by the above experiments. The experimental analysis shows that the main phase composition of Ni60/2.0 wt.%CeO2 composite coating is γ-(Ni, Fe), Cr7C3, Cr23C6, CrB, CrFeB and Cr2Ni3. Meanwhile, in XRD, it can be seen that the diffraction peak has shifted to the left and the single diffraction peak is decomposed into double diffraction peaks with the thermal treatment at 700 °C, which indicates that the lattice in the coating phase has a certain distortion. Compared with the coatings without thermal treatment, Ni60 cladding layer has more uniform solute distribution and a denser and more uniform structure after thermal treatment at 700 °C. The laser cladding anti-wear composite coating demonstrates that the wear resistance performance shows the greatest improvement after thermal treatment at 700 °C.

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The Effect of Laser Scanning Speed on Microstructure and Performance of Cr3C2-NiCr Cermet Fabricated by in-situ Laser Cladding

Cited by 2 publications

References 0 publications

Preparation, Microstructure, and Interface Quality of Cr3C2-NiCr Cladding Layer on the Surface of Q235 Steel

Preparation, Microstructure, and Interface Quality of Cr3C2-NiCr Cladding Layer on the Surface of Q235 Steel

Effects of Thermal Treatment on Microstructure and Wear Properties of Ni60/CeO2 Composite Coating 35CrMoV Steel by Laser Cladding

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