Manufacturing of WC-Co moulds using SLS machine

作者：Kumar S^*

来源：Journal of Materials Processing Technology, 2009, 209(8): 3840-3848.

DOI：10.1016/j.jmatprotec.2008.08.037

• Laser sintering
• WC-Co
• Rapid tooling
• Fretting wear

Tungsten carbide-cobalt composite is widely used as a wear-resistant material for cutting tools, molds and other applications. its production by Selective Laser Sintering (SLS) technique promises to combine the material properties of a composite with the flexibility of a production process. The present paper deals with SLS of a powder mixture of tungsten carbide and cobalt with an aim to make functional parts using a modified Rapid Prototyping (RP) machine (100W DTM Sinterstation 2000). The associated manufacturing problems and their solutions are discussed. Various compositions of powders have been tried before being settled to a particular composition of WC-9 wt.% Co for making final parts. Bronze infiltration is done on laser sintered parts to enhance their mechanical properties. Fretting wear test is taken as a main characterizing test which is used for estimating the wear resistance of samples.

• 出版日期2009-4-21