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US 8,025,989 B2Granted
Coated cutting insert
AssigneeSeco Tools AB
InventorTommy Larsson
Life of this patent
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Abstract
Coated cemented carbide inserts (cutting tools), particularly useful for wet or dry machining of steels and stainless steels, are disclosed. The cutting tool insert is characterized by a cemented carbide substrate and a coating comprising an about 0.5 to 5 μm thick innermost layer of (Ti,Al)N and an about 1 to 5 μm thick layer of (Al,Cr)2O3.
Claims24
A cutting tool insert, comprising:
- a cemented carbide substrate;
- and
- a coating;
- wherein said coating comprises:
- a first, innermost, layer of Ti1-xAlxN with about x>about 0.6 to about 0.7 with columnar grains and a total thickness of about 0.5-5 μm;
- and
- a layer of (Al1-yCry)2O3 with about 0.1≦y≦about 0.6 with a thickness of about 1-5 μm with columnar grains,
- wherein said cemented carbide substrate has a coercivity of about 10-15 kA/m.
5 more elements
A cutting tool insert, comprising:
- a cemented carbide substrate;
- and
- a coating;
- wherein said cemented carbide substrate, comprises:
- about 4.7-5.9 wt-% Co;
- about 5.0-10.0 wt-% total amount of cubic carbides of metals selected from the group consisting of Ti, Ta, Nb, and combinations thereof;
- and
- balance WC
- wherein said coating comprises:
- a first, innermost, layer of Ti1-xAlxN with about x>about 0.6 to about 0.7 with columnar grains and a total thickness of about 0.5-5 μm;
- and
- a layer of (Al1-yCry)2O3 with about 0.1≦y≦about 0.6 with a thickness of about 1-5 μm with columnar grains,
- wherein said cemented carbide substrate has a coercivity of about 11-14 kA/m.
10 more elements
Dependencies are inferred from the claim text.