Structural modifications of WC/Co nanophased and conventional powders processed by selective laser melting

Domashenkov, Alexey; Borbély, András; Smurov, I.

doi:10.1080/10426914.2016.1176195

Cited by 66 publications

(22 citation statements)

References 43 publications

(44 reference statements)

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“…Due to the uneven structure of the SLM sample, its hardness distribution is also uneven. The hardness of the finegrained region is higher than that of the coarse-grained region [69]. Adding Cr to WC-Co can limit the growth of WC grains, thereby improving the hardness.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Cramer et al suggested that a decrease in Co content increases the ternary phase generation window using a W-C-Co tenary phase diagram [77]. In addition, the thermal expansion coefficient mismatches between Co and WC [69,129]. These factors, combined with residual stresses, lead to cracks in SLM WC-Co samples.…”

Section: Defectsmentioning

confidence: 99%

“…For WC-Co parts, hardness is also an important performance indicator. The hardness of WC-Co samples prepared by SLM is usually around 1500 HV0.5 or 9.5 GPa [69,70]. The hardness of the samples made by SEBM is 9.0~9.5GPa [41].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Additive manufacturing of WC-Co hardmetals: a review

Yang

Zhang

Wang

et al. 2020

Int J Adv Manuf Technol

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WC-Co hardmetals are widely used in wear-resistant parts, cutting tools, molds, and mining parts, owing to the combination of high hardness and high toughness. WC-Co hardmetal parts are usually produced by casting and powder metallurgy, which cannot manufacture parts with complex geometries and often require post-processing such as machining. Additive manufacturing (AM) technologies are able to fabricate parts with high geometric complexity and reduce post-processing. Therefore, additive manufacturing of WC-Co hardmetals has been widely studied in recent years. In this article, the current status of additive manufacturing of WC-Co hardmetals is reviewed. The advantages and disadvantages of different AM processes used for producing WC-Co parts, including selective laser melting (SLM), selective electron beam melting (SEBM), binder jet additive manufacturing (BJAM), 3D gel-printing (3DGP), and fused filament fabrication (FFF) are discussed. The studies on microstructures, defects, and mechanical properties of WC-Co parts manufactured by different AM processes are reviewed. Finally, the remaining challenges in additive manufacturing of WC-Co hardmetals are pointed out and suggestions on future research are discussed.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Defectsmentioning

confidence: 99%

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Additive manufacturing of WC-Co hardmetals: a review

Yang

Zhang

Wang

et al. 2020

Int J Adv Manuf Technol

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“…On the other hand, it has been reported that uniform and crack-free single tracks can be formed from nanostructured ball-milled powder with a composition of WC-75 wt.% Co [12]. However, another experimental approach showed that a decomposition of WC, cracking, and porosity in the Co-based matrix were predominant material characteristics when both high-energy milled and agglomerated and sintered nanostructured WC-12 wt.% Co powders have been processed [13]. Also, it has been observed that nano-sized and submicron WC particles have completely dissolved when a powder mixture had a Co content of 50 wt.%, and can only be retained with Co of just 6 wt.% [14].…”

Section: Introductionmentioning

confidence: 99%

Processability of Atypical WC-Co Composite Feedstock by Laser Powder-Bed Fusion

et al. 2019

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Processing of tool materials for cutting applications presents challenges in additive manufacturing (AM). Processes must be carefully managed in order to promote the formation of favourable high-integrity ‘builds’. In this study, for the first time, a satelliting process is used to prepare a WCM-Co (12 wt.% Co) composite. Melting trials were undertaken to evaluate the consolidation behaviour of single tracks within a single layer. Tracks with continuous and relatively uniform surface morphology were obtained. These features are essential for high-quality AM builds in order to encourage good bonding between subsequent tracks within a layer which may reduce porosity within a 3D deposition. This study elucidates the formation of track irregularities, melting modes, crack sensitivity, and balling as a function of laser scanning speed and provides guidelines for future production of WCM-Co by laser powder-bed fusion.

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“…The past decades have witnessed a booming consuming of cemented carbides (WC/Co) in such various applications as drilling and mining due to their excellent mechanical properties [1][2][3][4][5][6][7][8][9][10]. The existence of WC grains equips cemented carbides with high hardness, strength and good wear resistance, whereas binder phases contribute the toughness and ductility to the alloys.…”

Section: Introductionmentioning

confidence: 99%

Sintering of BN/cemented carbide composites under an electric field for improved mechanical performances

Zhang

Liu

Yang

et al. 2019

Materials Science and Engineering: A

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Structural modifications of WC/Co nanophased and conventional powders processed by selective laser melting

Cited by 66 publications

References 43 publications

Additive manufacturing of WC-Co hardmetals: a review

Additive manufacturing of WC-Co hardmetals: a review

Processability of Atypical WC-Co Composite Feedstock by Laser Powder-Bed Fusion

Sintering of BN/cemented carbide composites under an electric field for improved mechanical performances

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