Microstructural analyses and wear behavior of the cemented carbide tools after laser surface treatment and PVD coating

• DOI: 10.1016/j.apsusc.2013.06.033
• Publication Date: 2013-06-13T09:04:26Z
• Authors: Davi Neves; Anselmo Eduardo D...; Milton Sérgio Fer...
• Keywords: Indentation; Cemented carbide; Tungsten Carbide

Adhesion is one of the most important characteristics coating on cutting tools. Poor adhesion tool favors fragmentation and release hard abrasive particles between workpiece. These interact with surfaces tool, accelerating its wear decreasing life. One possible solution use laser texturing prior to in order achieve a desired surface topography enhanced properties. In texturing, high-frequency short-pulse changes characteristics, generating resolidified material selective vaporization. This work evaluated effectiveness improving substrate–coating PVD coated cemented carbide To this end, substrates were textured Nd:YAG laser, four different intensities, then TiAlN film. ascertain Rockwell C indentation turning experiments performed both tools conventional unlasered The laser-textured showed better performance tests than standard A comparative evaluation mechanisms indicated that did not change mechanisms, but altered their importance wear. anchoring provided by higher roughness increased substrate, thus increasing Additionally, chemical modification grains due heating might be responsible for an substrate.