Coated inserts for wet milling

摘要

Coated milling inserts particularly useful for milling of highly alloyed grey cast iron with or without cast skin under wet conditions at preferably rather high cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds are disclosed. The inserts are characterised by a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiC_xN_y with columnar grains followed by a layer of kappa-Al₂O₃ and a top layer of TiN.