Samples of submicron WC-Co-Re cemented carbide were produced and examined by different techniques. The microstructure the samples is fine extremely uniform indicating strong inhibiting effect Re with respect to WC grain growth during liquid-phase sintering. Results examination hot hardness at a temperature 500°C provide evidence for significantly higher value in comparison that conventional WC-...

Design criteria for high strength tool materials have to include wear resistance of the abrasive particle, high hardness and adequate toughness. Cold compaction and vacuum sintering of PM high speed steels (HSSs) to full density is now a well established technique [1-3]. In recent years, work has been undertaken to sinter metal matrix composites that contain ceramic particles in HSSs by the sam...

Cemented carbides are highly resistant to abrasion, erosion and sliding wear frequently used in drilling cutting tool operations. In the present investigation, different submicrometric (0.8 µm) WC (tungsten carbide)-based composites were developed, containing various binders of Co, Ni, NiCr, NiMo, NiCrMo. The main objective work was simultaneous tribological electrochemical characterization inv...

The tribological and mechanical behavior of coated tools depends not only on intrinsic properties of the deposited film but also on substrate surface and subsurface properties – such as topography and residual stress state – as well as on interface adhesion strength. It is particularly true in the case of coated tools based on WC-Co cemented carbides (backbone materials of the tool manufacturin...

The thermal-stress resistance and fracture-strength behavior of TIC and WC after severe thermal shocking were investigated. The damage-resistance parameter, (K1c/af)2, for both carbides was determined over a wide range of loading rates and temperatures. The fracture-strength behavior of these two carbides in the quenching temperature range of 25" to 800°C follows Hasselman's model for an instan...

Tungsten carbide (WC) is a widely used engineering material which is usually prepared at high temperature. A new mechanism for synthesizing nanoscaled WC at ultralow temperature has been discovered. This discovery opens a novel route to synthesize valuable WC and other carbides at a cost-efficient way. The novel formation mechanism is based on an ion-exchange resin as carbon source to locally a...