Coated cutting tool

一种切削工具、涂层的技术，应用在涂层、金属材料涂层工艺、制造工具等方向，能够解决脱层、涂层脱层等问题
CN104011256AInactive Publication Date: 2014-08-27LAMINA TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LAMINA TECH
Publication Date
2014-08-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a coated cutting tool comprising a substrate and a coating, where the coating comprises at least one compound layer deposited by cathodic arc deposition, which has a thickness of 10-30 [mu]m characterized in that the coating has internal stress ranges from low tensile stresses, lower than 0.2GPa, to compressive stresses, lower than 3GPa.
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Description

technical field

[0001] The present invention relates to a coated cutting tool comprising a substrate and a thicker PVD coating. Background technique

[0002] Most cutting tools used for turning, milling, drilling, or other machining operations that form chips are today coated with wear-resistant coatings deposited using chemical vapor deposition (CVD) or physical vapor deposition (PVD) techniques, thereby enabling Extend the life of the tool and / or increase productivity. Typically, thicker coatings are used for increased wear resistance. For CVD coatings this is easy to achieve. However, PVD coatings have several attractive properties compared to CVD coatings, notably the ability to provide compressive stress in the coating, which results in increased toughness compared to CVD coatings. This compressive stress basically originates from the difference in thermal expansion between the substrate and the coating as well as the densification effect brought about by the bombard...

Claims

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