T. Schubert, A. Breninek, T. Bernthaler, D. Sellmer, M. Schneider, G. Schneider
August 22, 2017
Tungsten carbide-cobalt hard metal produced by additive manufacturing offers opportunities to meet the increasingly complex requirements of high-performance machining. Besides a high level of design freedom and the easy integration of functional properties, the additive manufacturing of hard metals also offers potential for cost savings and conservation of resources. A window of favorable process parameters for laser beam melting was established using commercially available carbide powder with 17 % Co content, which serves to build carbide samples by laser-based additive manufacturing. Compared to conventionally manufactured carbides, deviations can still be noticed with regard to microstructural and mechanical properties. However, bending strengths of > 1 000 MPa and fracture toughness in the range of 10–12 Mpa √m are promising for the future additive manufacturing of WCCo hard metals.