Carbide grain growth in cemented carbides sintered with alternative binders

Roulon, Zoé; Missiaen, Jean-Michel; Lay, S.

doi:10.1016/j.ijrmhm.2019.105088

Cited by 33 publications

(10 citation statements)

References 25 publications

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“…The choice of transition metal such as Co, Fe or Ni, has been done based on their good wettability and solubility of W and C and based on their good mechanical properties. Cermets, also known as Hardmetals are extensively utilized for manufacturing of cutting tools and are classically manufactured by powder sintering [10][11][12][13][14]. Considering several studies, it can be concluded that L-PBF manufacturing of WC-Co parts remains challenging [15][16][17].…”

Section: Additive Manufacturing Of Cermet Produced By Laser Powder Be...mentioning

confidence: 99%

Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder

PAPY

2023

Materials Research Proceedings

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Abstract. Cermets are composite materials made of a ceramic reinforcement and a metal matrix, generally cobalt as binder, with mass content from 6 to 20 wt.%. Cermets are produced by conventional sintering process and are known for their high hardness, low friction coefficient, high wear resistance, and high melting temperature. Laser Powder Bed Fusion (L-PBF) is an additive manufacturing technology widely applied for direct fabrication of functional metallic parts with complex geometry such as internal channels or lattices structures. Considering several studies, production of cermets by L-PBF process is challenging. Recent publications have demonstrated the feasibility to produce WC-Co parts by L-PBF combined with Hot Isostatic Pressure (HIP) heat-treatment. HIP process is sometimes additionally performed as post-treatment to remove defects. HIP is performed at high temperatures and isostatic pressures in a furnace [1]. In this study, following an experimental design a parametric optimization was conducted in order to maximize the mass density of WC-17Ni. Process parameters were compared to those used for WC-17Co parts from recent study [2]. To improve the printed specimen integrity, the as-built samples were heat-treated. As-built and HIP samples were analyzed and compared in terms of mass density, microstructure, crystallographic phases, and macro hardness.

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Section: Additive Manufacturing Of Cermet Produced By Laser Powder Be...mentioning

confidence: 99%

Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder

PAPY

2023

Materials Research Proceedings

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“…2f). They are related to the grain growth process in W-rich alloys: nucleation of new layers would be more rapid than lateral growth of these layers, especially in WC-Fe,W [19]. and (0,0,0,1) basal (B) facets.…”

Section: General Features Of Wc Grainsmentioning

confidence: 99%

“…Suitable compositions have to be carefully examined to avoid the formation of detrimental phases [16,17]. Up to now, there has been little research on the exact effect of Ni-or Fe-rich binder on sintering and microstructure evolution [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Interface characteristics in cemented carbides with alternative binders

Roulon

Lay

Missiaen

2020

International Journal of Refractory Metals and Hard Materials

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Cemented tungsten carbides with Co, Ni or Fe binders were studied by transmission electron microscopy.Particular attention was paid to phase and grain boundaries. A striking feature is the high frequency of coherent carbide/binder interfaces with Fe. The Fe rich binder adopts an epitaxy orientation relationship with prismatic facets of WC, with a parametric misfit of about 1.5%. A special orientation relationship with basal facets of WC grains is sometimes observed with Ni binder, as already noticed for Co. It is associated with a parametric misfit of about 15%. Binder segregation in WC grain boundaries was studied taking into account the effect of carbon content in the alloys. Whatever the binder, no influence of the carbon content could be pointed out. The analyses performed in random grain boundaries in WC-Co alloys agree with the literature value of 0.5 monolayer of segregated Co while slightly larger values are obtained for Ni and Fe binder. ∑=2 special grain boundaries were studied in WC-Co and WC-Ni alloys and no segregation was detected. The higher grain boundary segregation as well as the occurrence of coherent interfaces should influence the mechanical properties of WC-Fe alloys.

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“…O metal duro tem sido usado como ferramentas de corte, na usinagem, desde a década de 1920. Conhecido como um material cerâmico, é processado pela rota convencional da metalurgia do pó, sendo fabricado a partir de pós-metálicos, carbonetos de tungstênio (WC) e cobalto (Co), podendo ser utilizado novos ligantes alternativos, especialmente o níquel (Ni) ou ferro (Fe), a combinação de dureza e ductilidade fornece propriedades mecânicas superiores a outras ligas [1]. Em 1933, foi desenvolvido uma liga WC-Ni com a marca RENIK, como substituto da liga WC-Co, pela empresa Moscow Plant of Rare Chemical Elements, para munições e armamentos durante a 2 ª Guerra Mundial [2].…”

Section: Introductionunclassified

Carbonetos de WC com fase ligante Co-Ni, comportamento da dureza e resistência à ruptura transversal em função da adição de SiC-± e seus efeitos na temperatura de sinterização

Rodrigues¹,

Nakamoto²,

Santos³

et al. 2022

Tecnol. Metal. Mater. Min.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado.a ResumoA vantagem de substituir o WC (15,67 g/cm 3 ) pelo SiC-α (3,21 g/cm 3 ) é o custo da matéria-prima e a baixa densidade do carboneto. A substituição do Co (8,90 g/cm 3 ) pelo Ni (8,91 g/cm 3 ), é devido à escassez da matéria-prima, restrições ao uso devido a exposição ocupacional e o preço comercial. Em relação aos experimentos realizados neste estudo, foram preparadas 3 misturas, sendo a primeira, a partir de WC-11(Co, Ni) e as demais reforçadas com adição de teores 0,6% e 1,2% de SiC-α, em peso, que foram produzidas pela técnica de metalurgia do pó convencional. Os compactados a verde foram sinterizados em fornos Sinter HIP, sinterização a vácuo em 1.380 e 1.420 ºC durante 60 minutos de estabilização e submetidos a uma pressão de 20 bar com nitrogênio. Os resultados apresentaram que com o excesso de carbono livre presente matéria-prima e mais o aumento da temperatura de sinterização influenciaram fortemente no crescimento do grão de WC e no surgimento de porosidades que consequentemente afetaram as propriedades mecânicas das ligas de metal duro.Palavras-chave: Metalurgia do pó; Metal duro; SiC-α; Sinterização; Microestrutura e propriedades. WC cemented carbides with based Co-Ni binder phase -hardnessand transverse rupture strength behaviour as a function of SiC-α additions and their effects on the sintering temperature

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Carbide grain growth in cemented carbides sintered with alternative binders

Cited by 33 publications

References 25 publications

Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder

Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder

Interface characteristics in cemented carbides with alternative binders

Carbonetos de WC com fase ligante Co-Ni, comportamento da dureza e resistência à ruptura transversal em função da adição de SiC-± e seus efeitos na temperatura de sinterização

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