Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Archives of Metallurgy and Materials

1 2022

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Additive Manufacturing of WC-Co by Indirect Selective Laser Sintering (SLS) using High Bulk Density Powders

Gădălean Rares Vasile, Jucan Ovidiu-Darius, Chicinaş Horea, Bâlc Nicolae, Popa Catalin O.

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 2

577--585

Research in additive manufacturing of tungsten carbide-cobalt has intensified over the last few years due to the increasing need for products designed using topology optimisation and multiscale structures (lattice). These products result in complex shapes and contain inner structures that are challenging to produce through conventional techniques, thus involving high costs. The present work addresses this problem using a two-step approach to 3D print parts with complex shapes and internal structures by employing indirect selective laser sintering (SLS) and tungsten carbide-cobalt sintering. The paper takes further our research in this field [1] to improve the part density by using high bulk density tungsten carbide-cobalt powders. Mechanically mixing tungsten carbide-cobalt with the sacrificial binder, polyamide 12, results in a homogenous powder successfully used by the selective laser sintering process to produce green parts. By further processing, the green parts through a complete sintering cycle, an average final part density of 11.72 g/cm3 representing more than 80% of the theoretical density is achieved.