Coated cutting insert for milling
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United States of America Patent
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Mar 27, 2012
Grant Date -
Jan 12, 2012
app pub date -
Sep 22, 2011
filing date -
Oct 10, 2007
priority date (Note) -
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Abstract
A coated cemented carbide insert is particularly useful for wet or dry milling steels at high cutting speeds, milling of hardened steels, and high feed copy milling of tool steels. The insert is formed by a cemented carbide body including WC, NbC and TaC, a W-alloyed Co binder phase, and a coating including an innermost layer of TiCxNyOz, with equiaxed grains, a layer of TiCxNyOz with columnar grains and a layer of α-Al2O3.
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