Effect of Ni content and maceration metal on the microstructure and properties of WC based diamond composites

Zhang, Kai; Wang, Deguo; Wang, Zhenquan; Li, Yang; Zhou, Qinglong; Liu, Baolin; Wang, Zhiqiao

doi:10.1016/j.ijrmhm.2020.105196

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…WC can improve the hardness and wear resistance of the coating. The combination of the two can enhance the bonding strength and fracture toughness of the coating [12]. A layer consisting of nickel alloys and WC particles is made on one side of the cutting edge by laser cladding, which combines the hardness and toughness for this layer.…”

Section: Introductionmentioning

confidence: 99%

Self-Grinding Silage Knife Strengthened with Ni–WC Alloy Prepared by Laser Cladding

Song

et al. 2021

Applied Sciences

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The working environment of agricultural cutting tools is poor, and the operational quality and efficiency are reduced after they become blunt. This study aimed to develop a high wear-resistant agriculture knife with a long life. A Ni–WC alloy, wear-resistant layer was prepared using laser cladding technology on one side of the cutting edge of a 65 Mn silage knife. A self-grinding edge was formed when the cladded knife was used, which improved the cutting quality and service life of the knife. The microstructure, phase, composition, and hardness distribution of the cladding layer were detected and analyzed. The impact toughness and wear resistance of the laser-cladded samples were analyzed, and the cladded knife was tested in the field. The results show that a cladded layer with a dense microstructure formed metallurgical bonds with the substrate. The microhardness was uniform across the cladded layer, and the average hardness of the micro Vickers was approximately 1000 HV(0.2), which was approximately three times the hardness of the substrate. The impact toughness and wear resistance of the coated knife were obviously higher than those of uncoated knives. The field tests showed that compared with a conventional 65 Mn knife, the self-grinding knife with laser cladding could maintain its sharp cutting shape after operation for 76 h, which greatly extended the service life of the knife. This study improved the service life of an agricultural cutting tool, which enhanced the cutting performance and efficiency at the same time.

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Section: Introductionmentioning

confidence: 99%

Self-Grinding Silage Knife Strengthened with Ni–WC Alloy Prepared by Laser Cladding

Song

et al. 2021

Applied Sciences

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“…Using the Voigt-Reuss-Hill approximation, the three-dimensional distribution of WC and W 2 C elasticity performance was evaluated by ElasticPOST code [28]. Figure 2 shows the mechanical properties derived from the elastic constants in different directions, the 3D modulus surfaces of WC and W 2 C deviate from the sphere, indicating that the Young's modulus is anisotropic, further predicting the microcracking [29].…”

Section: Thermodynamic Analysis Of Interfacial Reactionsmentioning

confidence: 99%

Preparation of high wear resistance nickel based WC coating by carefully adjusting interface structure

Fan

Ou²,

Rong³

et al. 2022

Mater. Res. Express

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In recent years, many scholars have paid attention to wear-resistant coatings for shield machine cutterheads due to their very high consumption rates. Among these coatings, nickel-based tungsten carbide (Ni-based WC) is one of the best, showing both corrosion resistance and wear resistance. However, to further improve the wear resistance of such coatings, there are still numerous issues that need to be resolved. Herein, a new method, distinct from conventional methods, is presented. Specifically, the brittle phase W2C is not widely regarded as the main wear-resistant phase, but we were surprised to find that careful adjustment of its rigid structure can yield satisfactory results. Experimental results and first-principles simulations have indicated that the friction coefficient and weight loss of a coating with a suitable distribution of W2C are only half of those of a traditional Ni-based WC coating (about five times higher than those of the substrate), which can mainly be attributed to the excellent thermal expansion coefficient and hardness of the W2C phase. As we expected, the surface morphology of the material after wear revealed that the suitable W2C layer has a well-defined friction morphology. We hope to provide new ideas for the study of Ni-based WC coatings in shield machine cutterheads.

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“…Currently, the main investigations concerning WC-based cemented carbides are focused on mechanical properties [ 12 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Study concerning their thermal properties still needs to be advanced.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Thermal Conductivity of Two-Phase WC-Co-Ni Cemented Carbides through a Novel Model and Key Experiments

Wen

Jing

Long³

et al. 2023

Materials

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Excellent thermal conductivity is beneficial for the fast heat release during service of cemented carbides. Thus, thermal conductivity is a significant property of cemented carbides, considerably affecting their service life. Still, there is a lack of systematic investigation into the thermal conductivity of two-phase WC-Co-Ni cemented carbides. To remedy this situation, we integrated experiments and models to study its thermal conductivity varying the phase composition, temperature and WC grain size. To conduct the experiments, WC-Co-Ni samples with two-phase structure were designed via the CALPHAD (Calculation of Phase Diagrams) approach and then prepared via the liquid-phase sintering process. Key thermal conductivity measurements of these prepared samples were then taken via LFA (Laser Flash Analysis). As for modeling, the thermal conductivities of (Co, Ni) binder phase and WC hard phase were firstly evaluated through our previously developed models for single-phase solid solutions. Integrating the present key measurements and models, the values of ITR (Interface Thermal Resistance) between WC hard phase and (Co, Ni) binder phase were evaluated and thus the model to calculate thermal conductivity of two-phase WC-Co-Ni was established. Meanwhile, this model was verified to be reliable through comparing the model-evaluated thermal conductivities with the experimental data. Furthermore, using this developed model, the thermal conductivity of two-phase WC-Co-Ni varying with phase-fraction, temperature and grain size of WC was predicted, which can contribute to its design for obtaining desired thermal conductivities.

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Effect of Ni content and maceration metal on the microstructure and properties of WC based diamond composites

Cited by 10 publications

References 25 publications

Self-Grinding Silage Knife Strengthened with Ni–WC Alloy Prepared by Laser Cladding

Self-Grinding Silage Knife Strengthened with Ni–WC Alloy Prepared by Laser Cladding

Preparation of high wear resistance nickel based WC coating by carefully adjusting interface structure

Investigations on Thermal Conductivity of Two-Phase WC-Co-Ni Cemented Carbides through a Novel Model and Key Experiments

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