WC-Co and WC-Co-Cr Coatings for the Protection of API Pipeline Steel from Corrosion in 4% NaCl Solution

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...

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 ...

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...

FRACTURE AND FATIGUE BEHAVIOR OF WC-Co AND WC-CoNi CEMENTED CARBIDES

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...