Coated inserts for wet milling
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United States of America Patent
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Sep 30, 2008
Grant Date -
May 25, 2006
app pub date -
Oct 31, 2005
filing date -
Nov 8, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.sub.xN.sub.y with columnar grains followed by a layer of .kappa.-Al.sub.2O.sub.3 and a top layer of TiN.
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