Microstructure and mechanical properties of WC-Co reinforced with NbC

Abstract

Cemented carbides such as tungsten carbide-cobalt WC-Co composites have been widely used as cutting tool materials. Several reports have shown the influence of different factors such as grain size, type and amount of binder phase and the addition of hard particles on the properties of WC-Co. The purpose of this work was to investigate the effect of niobium carbide on the microstructure and mechanical properties of WC-Co. Specimens of WC-Co reinforced with NbC were mixed and subsequently hot-pressed in a inert atmosphere. The WC-Co-NbC composite material exhibited high hardness values (18.9 GPa), flexural strength (2100 MPa) and fracture toughness (11.2 MPa.m½ ). TEM analysis has shown a bimodal grain size distribution of WC

Ti(C,N) and WC-Based Cermets: A Review of Synthesis, Properties and Applications in Additive Manufacturing

“…Acchar et al produced WC-Co reinforced with NbC by hot-pressing in an inert atmosphere. The WC-Co-NbC composite material exhibited high hardness values (18.9 GPa), flexural strength (2100 MPa) and fracture toughness (11.2 MPa.m½) when used as cutting tool materials [145]. An example of the specifications and applications of the cermets is suggested in Table 2.…”

Çeliklerin işlenebilirliği: kimyasal bileşim, mikroyapı, mekanik özellikler ve işlenebilirlik ilişkisi

“…İkinci önemli karakteristik özelliği ise, kobalt, nikel ve demirle iyi ıslatabilirliğe ve birleşme eğilimine sahip olmasıdır. Bu elementlerle yüksek ıslatabilirliği, WC' ün kompozit yapı oluşturmasını mümkün kılar [86][87][88][89][90]. Kobalt oranı %4-28 arasında değişir.…”

Effects of Electropulsing Treatment on Microstructure and Properties of Cemented Carbide (WC-15Co)

“…[1] Compared with iron-based steel, WC-15Co shows promising properties, such as excellent strength, high hardness, and good wear resistance, and is widely used in tool materials including cutting tools and wear parts. [2,3] The properties of WC-15Co strongly depend on its phases. However, the Co phase is prone to microcracks because of the hardness difference between the strengthening phase WC and the binder phase Co and a high proportion of residual e-Co. [4,5] To improve the service life of WC-Co, it is necessary to repair the microcracks of components.…”