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US 2011/0299950 A1Published application
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 formed from 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.
Claims20
A method for machining of steel or stainless steel, comprising:
- providing a cutting tool insert formed from a cemented carbide substrate and a coating, the coating comprising a first (innermost) layer of Til-xAlxN with about 0.25 ≦x≦ about 0.7 with columnar grains and a total thickness of about 0.5-5μm, and a layer of (All-yCry)2O3 with about 0.1≦y≦about 0.6 with a thickness of about 1-5μm with columnar grains;
- and
- cutting with the cutting tool insert at a cutting speed of about 75-600 m/min with an average feed, per tooth in the case of milling, of about 0.08-0.5 mm.
Dependencies are inferred from the claim text.