نتایج جستجو برای: wc co
تعداد نتایج: 338277 فیلتر نتایج به سال:
In order to study the wear resistance and corrosion of a composite material with Fe316L substrate Co-Cr-WC coating, Co-Cr alloy coatings different mass fractions WC (hard tungsten carbide) were prepared on by laser cladding technology. The phase composition, microstructure element distribution analyzed X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive spectroscopy (E...
Inhalation of cobalt (Co) and tungsten carbide (WC) particles, but not Co or WC alone, may cause hard metal disease, risk of which does not appear to be uniform across cemented tungsten carbide (CTC) production processes. Inhalation of Co alone or in the presence of WC may cause asthma. Hypothesizing that aerosol size, chemical content, heterogeneity, and constituent compaction may be important...
Tungsten carbide (WC) is the most important tungsten compound, and main component of WC-Co cermet composites. are widely used engineering materials due to combination high hardness strength with toughness plasticity metallic binder. The direct synthesis WC from concentrate containing ∼70% WO3 has been achieved by carbothermic reduction. Mineral/carbon black mixtures were prepared planetary ball...
Ground hardmetals are exposed to high temperatures during both processing (e.g. coating deposition) and use (e.g. as a cutting tool). However, studies on thermally induced changes of surface integrity are limited. Here we address this by means of FIB/FESEM and EBSD investigation, with special focus on the binder phase characterization. Our findings indicate that thermal treatment causes two mai...
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