Coated cutting tool and a method of making thereof
AssigneeSandvik Intellectual Property AB
InventorMats Ahlgren
Life of this patent
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Abstract
The present invention relates to a cutting tool for metal machining with improved wear properties, comprising a cutting tool substrate of cemented carbide, cermet, ceramics or a super hard material, and a wear resistant coating, wherein the wear resistant coating comprises a PVD Ti—Si—C—N layer with a compositional gradient, and a method of making thereof.
Claims16
A cutting tool for metal machining comprising a cutting tool substrate of cemented carbide, cermet, ceramics or a super hard material, and a wear resistant coating, wherein the wear resistant coating comprises a PVD Ti—Si—C—N layer with a compositional gradient, and said PVD Ti—Si—C—N layer has an average Si/(Si+Ti) atomic ratio of 0.05 to 0.15, and a residual stress of −3.0 GPa, compressive stress, up to +0.5 GPa, tensile stress.
Method of making a cutting tool for metal machining comprising:
- depositing onto a cutting tool substrate of cemented carbide, cermet, ceramics or a super hard material, a PVD Ti—Si—C—N layer with a compositional gradient using arc evaporation with one or more Ti targets and a reactive gas atmosphere comprising a flow of trimethylsilane gas, and
- continuously or incrementally changing the flow of the trimethylsilane gas during the deposition process.
Dependencies are inferred from the claim text.