Study on Surface Morphology and Composition Change of Cemented Carbide Tool in Picosecond Laser Processing
This paper focuses on the change characteristics of the surface composition during picosecond laser pro-cessing of cemented carbide,and studies the effects of different laser energy flux densities on the surface morphology,rough-ness,material removal characteristics and chemical composition of cemented carbide.The surface characteristics of sintered WC-Co cemented carbide before and after picosecond laser processing are mainly discussed.The mechanism of interaction between laser and WC-Co materials with different energy flux densities is obtained,and it is concluded that the mechanism of interaction between laser and WC-Co at low energy flux densities is mainly shallow surface melting mechanism,belonging to laser polishing,which could be used as finishing process in the laser processing of WC-Co tool.At high energy flow den-sity,the mechanism of interaction between laser and WC-Co is mainly stable removal of materials in the depth direction,which can be used as rough machining process in the laser processing of WC-Co tool.This study provides theoretical refer-ence and data support for laser machining of WC-Co tools.
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