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

Archives of Metallurgy and Materials

article

R.V. Gădălean¹  O.-D. Jucan³  H.F. Chicinaş²  N. Bâlc¹  C.O. Popa³ 

[1] Technical University of Cluj-Napoca, Department of Manufacturing Engineering;Gühring Romania;Technical University of Cluj-Napoca, Materials Science and Engineering Department

关键词: additive manufacturing;    selective laser sintering;    cemented carbide;    polyamide 12;   

DOI  :  10.24425/amm.2022.137793

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Research in additive manufacturing of tungsten carbide-cobalt has intensified over the last few years due to the increasingneed for products designed using topology optimisation and multiscale structures (lattice). These products result in complex shapesand contain inner structures that are challenging to produce through conventional techniques, thus involving high costs. The presentwork addresses this problem using a two-step approach to 3D print parts with complex shapes and internal structures by employingindirect selective laser sintering (SLS) and tungsten carbide-cobalt sintering. The paper takes further our research in this field [1] toimprove the part density by using high bulk density tungsten carbide-cobalt powders. Mechanically mixing tungsten carbide-cobaltwith the sacrificial binder, polyamide 12, results in a homogenous powder successfully used by the selective laser sintering processto produce green parts. By further processing, the green parts through a complete sintering cycle, an average final part density of11.72 g/cm3 representing more than 80% of the theoretical density is achieved.

【 授权许可】

CC BY-NC