Cutting tool composite coating and preparation method thereof

Abstract

The invention discloses a cutting tool composite coating, the functional layer of which comprises: a TiAlN single layer, a TiAlN / TiSiN nanocomposite layer, a TiSiN single layer and a TiAlN / TiSiN nanocomposite layer, and TiAlN is sequentially deposited on the surface of the TiAlN single layer / TiSiN nanocomposite layer, TiSiN single layer and TiAlN / TiSiN nanocomposite layer, described functional layer is the composite coating that contains multiple cycles; A kind of cutting tool composite coating and preparation method thereof provided by the present invention, cutting tool The composite coating has a periodic composite structure, which makes it have a good film-base adhesion effect under the premise of high hardness. It can be used to process die steel, high-speed steel, high-temperature alloy steel and even hardened steel.

Description

technical field

[0001] The invention relates to the technical field of cutting tool coatings, in particular to a cutting tool composite coating and a preparation method thereof. Background technique

[0002] In recent decades, coating technology has been widely used in the field of cutting tool protection, which has greatly improved tool life, machining accuracy and efficiency. In the field of high-alloy steel cutting, such as die steel, high-speed steel, and high-temperature alloy steel cutting, the commonly used TiAlN and AlCrN coatings can no longer meet the needs of processing occasions. More and more tool manufacturers choose to use TiSiN series coatings. layer. doped with amorphous Si 3 N 4 The TiSiN coating has been proved to have excellent oxidation resistance and red hardness, especially the hardness of the TiSiN coating can reach more than 4000HV, and can even be used to process hardened steel.

[0003] The performance of the TiSiN coating is directly related t...

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