A comparative study of the structure and wear resistance of NiCrBSi/50 wt.% WC composite coatings by laser cladding and laser induction hybrid cladding

Zhou, Shengfeng; Lei, Jianbo; Dai, Xiaoqin; Guo, Jinbo; Gu, Zhonghua; Pan, Hongbo

doi:10.1016/j.ijrmhm.2016.06.019

Cited by 101 publications

(36 citation statements)

References 33 publications

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“…It represents the average concentration (C 0 ) of a given element in the analyzed coating area according to the following equation [9,22,26]:k = C core /C 0 ,…”

Section: Resultsmentioning

confidence: 99%

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Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

et al. 2018

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In this study, the laser metal deposition (LMD) of the Inconel 625–tungsten carbide (WC) metal matrix composite was investigated. The composite coating was deposited on Inconel 625 substrate by powder method. A powder mixture containing 10 wt% of WC (5 µm) was prepared by wet mixing with dextrin binder. Coating samples obtained by low-power LMD were pore- and crack-free. Ceramic reinforcement was distributed homogenously in the whole volume of the material. Topologically close-packed (TCP) phases were formed at grain boundaries between WC and Inconel 625 matrix as a result of partial dissolution of WC in a nickel-based alloy. Line analysis of the elements revealed very small interference of the coating in the substrate material when compared to conventional coating methods. The average Vickers hardness of the coating was about 25% higher than the hardness of pure Inconel 625 reference samples.

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“…It represents the average concentration (C 0 ) of a given element in the analyzed coating area according to the following equation [9,22,26]:k = C core /C 0 ,…”

Section: Resultsmentioning

confidence: 99%

“…It is reported that the mechanical properties of LMD-deposited materials are improved when compared to pure alloys [22,23,24,25,26]. Thanks to rapid solidification, the microstructure of the material is much finer when compared to conventional methods, such as Tungsten Inert Gas.…”

Section: Introductionmentioning

confidence: 99%

Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

et al. 2018

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“…In general, coatings prepared by a combination of vacuum cladding and flexible "coated cloth" technology have a characteristic low internal stress, controllable thickness, higher surface hardness, and better wear resistance. At the same time, flexible metal cloth can overcome the problems of complicated structures and the location of the workpiece [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Brazing Temperature on the Microstructure and Chosen Properties of WC–10Ni/NiCrBSi Composite Coatings Produced by Vacuum Cladding from Flexible Coated Cloths

Xu¹,

Ding²,

Xia³

et al. 2019

Coatings

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Three kinds of WC–10Ni/NiCrBSi composite coatings were prepared on the surface of Q235 carbon steel at 1015, 1055, and 1095 °C by vacuum brazing. The microstructure and properties of the composite coatings were investigated. The results showed that various reaction layers appeared at the bonding area of the coatings and the substrate. As the brazing temperature increased, the reaction layer between the solder and the hard phase gradually decreased and disappeared at 1095 °C. Simultaneously, the size of gray-white massive phases with a large amount of W in the brazing layer decreased gradually. When the brazing temperature increased, the Fe content markedly increased in the reaction layer of the matrix and the solder, indicating that the increase in brazing temperature was beneficial for metallurgical bonding between the coating and the substrate. Interface bonding strength and wear resistance were enhanced by the increase in brazing temperature; however, the microhardness of the composite coating section decreased. The interface bonding strength reached 362.9 MPa and the wear loss reached a minimum at 1095 °C.

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“…The LC has several outstanding advantages in the surface modification field such as refined microstructures, metallurgical bonding and narrow heat affected zone (HAZ) [ 7 , 8 ], etc. Laser cladding improves the bonding strength between the coating and the substrate comparing to thermal spraying and reduces the loss of the coating during wear [ 9 ]. Coatings can greatly improve the wear resistance of the surface of the material to improve its wear properties [ 10 , 11 ], particularly compared to the substrate [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Micro-Structures and High-Temperature Friction-Wear Performances of Laser Cladded Cr–Ni Coatings

Dejun

2018

Materials

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Cr–Ni coatings with the mass ratios of 17% Cr–83% Ni, 20% Cr–80% Ni and 24% Cr–76% Ni were fabricated on H13 hot work mould steel using a laser cladding (LC). The surface–interface morphologies, chemical elements, surface roughness and phase composition of the obtained Cr–Ni coatings were analysed using a scanning electron microscope (SEM), energy disperse spectroscopy (EDS), atomic force microscope (AFM) and X–ray diffractometer (XRD), respectively. The friction–wear properties and wear rates of Cr–Ni coatings with the different mass ratios of Cr and Ni at 600 °C were investigated, and the worn morphologies and wear mechanism of Cr–Ni coatings were analysed. The results show that the phases of Cr–Ni coatings with mass ratios of 17% Cr–83% Ni, 20% Cr–80% Ni and 24% Cr–76% Ni are composed of Cr + Ni single-phases and their compounds at the different stoichiometry, the porosities on the Cr–Ni coatings increase with the Cr content increasing. The average coefficient of friction (COF) of 17% Cr–83% Ni, 20% Cr–80% Ni and 24% Cr–76% coatings are 1.10, 0.33 and 0.87, respectively, in which the average COF of 20% Cr–80% Ni coating is the lowest, exhibiting the better anti-friction performance. The wear rate of 17% Cr–83% Ni, 20% Cr–80% Ni and 24% Cr–76% Ni coatings is 4.533 × 10−6, 5.433 × 10−6, and 1.761 × 10−6 N−1·s−1, respectively, showing the wear resistance of Cr–Ni coatings at a high temperature increases with the Cr content, in which the wear rate is 24% Cr–76% Ni coating with the better reducing wear. The wear mechanism of 17% Cr–83% Ni and 20% Cr–80% Ni and 24% Cr–76% coatings at 600 °C is primarily adhesive wear, and that of 24% Cr–76% coating is also accompanied by oxidative wear.

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A comparative study of the structure and wear resistance of NiCrBSi/50 wt.% WC composite coatings by laser cladding and laser induction hybrid cladding

Cited by 101 publications

References 33 publications

Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

Grain-Boundary Interaction between Inconel 625 and WC during Laser Metal Deposition

Effect of Brazing Temperature on the Microstructure and Chosen Properties of WC–10Ni/NiCrBSi Composite Coatings Produced by Vacuum Cladding from Flexible Coated Cloths

Micro-Structures and High-Temperature Friction-Wear Performances of Laser Cladded Cr–Ni Coatings

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