Observation of flaky structures in WC-.BETA.t-Co alloy.

Surface roughness characterization of thermally sprayed and precision machined WC–Co and Alloy-625 coatings

Surface roughness characterization of thermally sprayed and precision machined WC–Co and Alloy-625 coatings was carried out. The objectives were to demonstrate that such difficult-to-machine coating surfaces could be machined with commercial machines and tools, and to characterize the surface finish of the machined coatings. The coatings were obtained using two thermal spraying processes: arc s...

بررسی رفتار سایشی کامپوزیت‌های WC-10wt%Co تجاری، WC-40vol%Co و WC-40vol%FeAl-B در دمای محیط

در این پژوهش رفتار سایشی کامپوزیت‌های تجاری WC-10wt%Co (H10F)، WC-40vol%Co و کامپوزیت‌های WC-40vol%FeAl-B با مقادیر مختلف بور از صفر تا ppm1000 به روش پین روی دیسک بررسی شد. آزمون‌های سایش در دمای محیط، تحت بار 40 نیوتن و طی مسافت 100 متر انجام شدند. سطوح سایش به وسیله میکروسکوپ الکترونی روبشی (SEM) مورد بررسی قرار گرفت. نتایج نشان داد که در بین نمونه‌ها، کامپوزیت WC-40vol%FeAl بدون بور کمترین ...

Residual Stress in Ground WC-Co Coatings

High velocity oxygen fuel (HVOF) spray technique is one of the leading technologies that have been proposed as an alternative to the replacement of electrolytic hard chromium plating in a number of engineering applications. In this study, WC-Co powder was coated on AISI1045 steel using high velocity oxy fuel (HVOF) method. The sinψ method was used to evaluate the through thickness residual stre...

Aqueous Processing of WC-Co Powders

Geometric and Crystallographic Characterization of WC Surfaces and Grain Boundaries in WC-Co Composites

Electron backscattered diffraction has been used to determine the orientation of WC crystals in a WC-Co composite and atomic force microscopy has been used to measure the shapes of planar sections of the same crystals. A stereological analysis has been used to determine that { } 1010 prism facets and the {0001} basal planes are the WC surfaces that are most frequently in contact with Co. Furthe...