Method for high speed machining and coated cutting tool
AssigneeSandvik Intellectual Property AB
InventorsKenneth Westergren, Marian Mikus, Leif Åkesson
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Abstract
The present invention relates to a method of machining a metal work piece with a coated cutting tool insert having a cemented carbide body and a coating deposited as monolayer(s) or as multiple and/or alternating layers. The coating has a total thickness of from about 25 to about 75 μm and the machining is performed at a cutting speed of greater than about 600 m/min, preferably from about 800 to about 1500 m/min. The invention also relates to a coated cutting tool useful for such machining operation.
Claims5
A coated cemented carbide insert comprising a cemented carbide body and a coating comprising monolayers and/or multiple and/or alternating layers,
- wherein said coating has a total thickness of from about 25 to about 75 μm and comprises:
- a first layer adjacent the cemented carbide body, the first layer including a carbide, nitride, carbonitride or carboxynitride of one or more of Ti, Zr and Hf or mixtures thereof with a thickness of from about 3 to about 30 μm,
- an α-alumina layer adjacent said first layer with a thickness of from about 3 to about 40 μm,
- a further layer adjacent the alumina layer, the further layer including a carbide, carbonitride or carboxynitride of one or more of the metals Ti, Zr and Hf or mixtures thereof with a thickness of from about 3 to about 30 μm, and
- a further α-alumina layer adjacent said further layer with a thickness of from about 3 to about 40 μm, and
- wherein the cemented carbide body has a binder phase content of less than or equal to about 6.5 wt- %.
Dependencies are inferred from the claim text.