نتایج جستجو برای: سرمت wc co
تعداد نتایج: 338295 فیلتر نتایج به سال:
The fracture and fatigue characteristics of several cemented carbide grades are investigated as a function of their microstructure. In doing so, the influence of binder chemical nature and content (Co and 76wt%Co-24wt%Ni), as well as carbide grain size on hardness, flexural strength, fracture toughness and fatigue crack growth (FCG) behavior is evaluated. Mechanical testing is combined with a d...
For rock drilling applications, the cemented carbides containing hard WC grains in a ductile Co binder are commonly used as drill buttons. In considering environmental and health aspects an alternate to Co-binder is pursued. present work, using standard scratch testing friction wear properties of WC-20 vol% Ni grade studied compared that grade. The deformation characteristics carbide grades eva...
In exploration of low-cost electrocatalysts for direct methanol fuel cells (DMFCs), Pt modified tungsten carbide (WC) materials are found to be great potential candidates for decreasing Pt usage whilst exhibiting satisfactory reactivity. In this work, the mechanisms, onset potentials and activity for electrooxidation of methanol were studied on a series of Pt-modified WC catalysts where the bar...
Abstract Cemented carbide tools suffer from many issues due to the use of tungsten and cobalt as raw materials. Indeed, those are listed by European Commission “critical materials” since 2011 US Department Interior minerals” in 2018. To remain competitive with conventional high-speed steels, less performant but cheaper, WC–Co can be recycled. In present paper, a WC–7.5Co powder, recycled “Colds...
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