Invention Grant
- Patent Title: Coated ceramic cutting insert and method for making the same
- Patent Title (中): 涂层陶瓷切削刀片及其制造方法
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Application No.: US12722015Application Date: 2010-03-11
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Publication No.: US08475944B2Publication Date: 2013-07-02
- Inventor: Zhigang Ban , Alfred Gates, Jr. , Yixiong Liu , Jie Wu
- Applicant: Zhigang Ban , Alfred Gates, Jr. , Yixiong Liu , Jie Wu
- Applicant Address: US PA Latrobe
- Assignee: Kennametal Inc.
- Current Assignee: Kennametal Inc.
- Current Assignee Address: US PA Latrobe
- Agent Matthew W. Gordon, Esq.
- Main IPC: B32B9/00
- IPC: B32B9/00

Abstract:
A coated ceramic cutting insert for removing material from a workpiece, as well as a method for making the same, that includes a ceramic substrate with a rake surface and at least one flank surface wherein a cutting edge is at the juncture therebetween. A wear-resistant coating scheme that includes an alumina-containing base coating layer region, which has at least one exposed alumina coating layer, deposited by chemical vapor deposition on the substantially all of the surfaces of the ceramic substrate that experience wear during removal of material from the workpiece. The exposed alumina coating layer exhibits a blasted stress condition ranging between about 50 MPa (tensile stress) and about −2 GPa (compressive) as measured by XRD using the Psi tilt method and the (024) reflection of alumina. The exposed alumina coating layer is the result of wet blasting a titanium-containing outer coating layer region from the surface of the alumina-containing base coating layer region.
Public/Granted literature
- US20110064530A1 COATED CERAMIC CUTTING INSERT AND METHOD FOR MAKING THE SAME Public/Granted day:2011-03-17
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