Agglomerated Tungsten Carbide: A New Approach for Tool Surface Reinforcement

Abstract:

For the first time tungsten carbide particles were deliberately agglomerated by two-step laser melt injection. After a regular laser melt injection, a second laser melt injection was performed with additional tungsten carbide particles in order to generate a large local agglomerate. The influence of laser power, laser spot diameter, powder feeding rate and pulse time on the agglomeration process was examined and depended on the energy input and tungsten carbide quantity introduced into the metal matrix composite surface. Chemical composition of the agglomerates corresponded with the values of tungsten carbide and the agglomerate hardness was slightly lower. It is intended to apply this agglomerated tungsten carbide for deep drawing tools under Dry Metal Forming conditions.

• Periodical: Key Engineering Materials (Volume 809)
• Pages: 121-127
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.809.121
• Online since: June 2019
• Authors: Adrian Ditsche*, Thomas Seefeld
• Keywords: Laser Melt Injection, Metal Matrix Composite, Surface Modification

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