Additive manufacturing of WC-20Co components by 3D gel-printing

Zhang, Xinyue; Guo, Zhimeng; Chen, Cunguang; Yang, Weiwei

doi:10.1016/j.ijrmhm.2017.10.005

Cited by 85 publications

(38 citation statements)

References 23 publications

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“…55 vol.% and 30 vol.%, respectively). Recent studies have shown that filaments based on stainless steel 316L [90] and copper [91] can be processed successfully. However, Gong et al [90] found that the 316L parts feature lower yield strength, UTS, and elastic modulus compared to AISI type SS 316L as well as laser melted SS 316L part.…”

Section: Materials Extrusionmentioning

confidence: 99%

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Beamless Metal Additive Manufacturing

2020

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The propensity to manufacture functional and geometrically sophisticated parts from a wide range of metals provides the metal additive manufacturing (AM) processes superior advantages over traditional methods. The field of metal AM is currently dominated by beam-based technologies such as selective laser sintering (SLM) or electron beam melting (EBM) which have some limitations such as high production cost, residual stress and anisotropic mechanical properties induced by melting of metal powders followed by rapid solidification. So, there exist a significant gap between industrial production requirements and the qualities offered by well-established beam-based AM technologies. Therefore, beamless metal AM techniques (known as non-beam metal AM) have gained increasing attention in recent years as they have been found to be able to fill the gap and bring new possibilities. There exist a number of beamless processes with distinctively various characteristics that are either under development or already available on the market. Since this is a very promising field and there is currently no high-quality review on this topic yet, this paper aims to review the key beamless processes and their latest developments.

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Section: Materials Extrusionmentioning

confidence: 99%

“…This is induced by the equiaxed grains and austenitic microstructure of the parts. A filament based on copper and a binder system based on paraffin wax, low density polyethylene, and stearic acid (PW-LDPE-SA) was developed and tested by Ren et al [91].…”

Section: Materials Extrusionmentioning

confidence: 99%

Beamless Metal Additive Manufacturing

2020

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“…Therefore, the 3D-printed components are green components, and their green density is mainly based on the powder density of the starting materials. After printing, the organic materials used during printing must be removed during a dewaxing step, and then, the components must be sintered according to a conventional sinter cycle [45][46][47]. In principle, this is near conventional hardmetal manufacturing.…”

Section: Bulk Densification Techniquesmentioning

confidence: 99%

Development of manufacturing technology on WC–Co hardmetals

Nie

Zhang

2019

Tungsten

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Hardmetals are tungsten carbide (WC)-based composites, which are made of WC as a hard phase and transition metals such as Co, Fe, or/and Ni as ductile binder matrices. Their properties can be mainly tailored through the grain sizes of the sintered carbides and the amount of metallic binder. As successful tool materials, hardmetals are widely applied in metal cutting, wear applications, chipless forming, stoneworking, wood, and plastic working. In 2017, about two-thirds of tungsten consumption (including recycled materials) were produced for hardmetals in the world. This paper briefly introduces the development of manufacturing technology on WC-Co hardmetals from three aspects: powder preparation, bulk densification, and performance characterization. Two special WC-Co hardmetals are also described: cobalt-enrichment zone (CEZ) hardmetals, and binderless hardmetals. Furthermore, the development prospects for manufacturing techniques of hardmetals are also presented in the end. Keywords Hardmetal • Ultrafine WC powder • Ultrafine cobalt powder • Extrusion press • Liquid sintering • Cobaltenrichment zone hardmetal • Binderless hardmetal 2 Powder preparation techniques Although WC-Co hardmetals can be made directly with mixing and reactive sintering of tungsten, carbon, and cobalt powders [6], the most commonly used method for preparing Tungsten www.springer.com/42864

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“…Shao et al [22] employed the 3DGP process by using a screw extruder to prepare zirconia ceramic parts with a regular appearance; the surface roughness of the printed ceramic green sample is 8.9 μm. Zhang et al [23] applied the 3DGP process to prepare hydroxyethyl methacrylate parts with WC-20Co solid content of 47-56 vol% by using a screw extruder. Samples with a good shape and a homogeneous microstructure can be printed with appropriate precision.…”

Section: Introductionmentioning

confidence: 99%

Effect of extrusion on viscoelastic slurry 3D print quality: numerical analysis and experiment validation

Zhang

Huang

et al. 2019

SN Appl. Sci.

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As a new manufacturing technology, three-dimensional (3D) printing is being applied gradually to all walks of life. 3D printing ceramic materials can solve the problem of hard and brittle materials in shape processing. In this study, precursor ceramic parts were prepared based on the technology of fusion deposition molding. To attain high surface accuracy of ceramic green samples, 3D printer plunger and screw extruders were applied for printing and for comparing the printing results. Two types of slurry extruder were simulated and analyzed. The determined slurry extrusion device was optimized. Results show that the quality of the green sample obtained by the screw extruder is significantly better than that obtained by the plunger extruder. The optimized 3D printer can finish printing the ceramic sample efficiently with the required printing precision.

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Additive manufacturing of WC-20Co components by 3D gel-printing

Cited by 85 publications

References 23 publications

Beamless Metal Additive Manufacturing

Beamless Metal Additive Manufacturing

Development of manufacturing technology on WC–Co hardmetals

Effect of extrusion on viscoelastic slurry 3D print quality: numerical analysis and experiment validation

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