Insert for milling of cast iron
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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 -
Sep 13, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coated cemented carbide insert is particularly useful for milling of cast iron, methods for making the insert, and methods of their use are disclosed. The insert is formed by a composition of the substrate of about 5-7 wt % Co, about 0.05-20 wt % total amount of the metals selected from the group consisting of Ti, Nb, Ta and combination thereof, and balance WC with a coercivity (Hc) of 1 about 4-19 kA/m and an S-value of about 0.81-0.96. The coating includes a homogeneous layer of (TixAl1-x)N, where x is between about 0.25 and abut 0.50 with a crystal structure of NaCl type and a total thickness of between about 1.0 and about 5.0 μm as measured on the middle of the flank face.
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