Multi-coating cutting tool deposited in periodicity and preparation method thereof

Abstract

The invention discloses a multi-coating cutting tool deposited in periodicity and a preparation method thereof. The multi-coating cutting tool comprises a cutting tool matrix and a coating deposited on the cutting tool matrix; the coating comprises a composite coating which is a multiple periodic coating taking TiN layer to TiSiN layer to TiAlSiN layer to TiSiN layer as one period. The multi-coating cutting tool prepared through simple process, conventional equipment and low manufacturing cost has high rigidity, high strength, excellent high-temperature oxidation resistance and high-temperature stability; and the coating and matrix have favorable bonding strength.

Description

technical field

[0001] The invention relates to a coated cutting tool and a preparation method thereof, in particular to a cutting tool deposited with a composite coating and a preparation method thereof. Background technique

[0002] It is one of the commonly used and effective methods to apply a hard coating on the surface of the cutting tool to increase its wear resistance and improve its service life. In the 1970s, TiN coating was used as a tool coating. Its successful application not only greatly improved the cutting life of the tool, but also increased the cutting speed by 4 to 10 times, which was regarded as an epoch-making technological breakthrough. However, with the development of the processing industry and the application of high-speed cutting technology, the relatively low hardness and poor high-temperature oxidation resistance of TiN coatings limit its application, and adding metal elements (such as Al, Cr, Zr, etc.) can further improve its hardness and oxidat...

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