PVD coating with strong (111) texture and preparation method thereof

A coating and texture technology, applied in the fields of cutting tools and powder metallurgy composite materials, to achieve the effect of improving crystal integrity, reducing crystal defects and improving service life
CN110284038AActive Publication Date: 2019-09-27CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2019-09-27

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Abstract

The invention relates to a PVD coating with a strong (111) texture and a preparation method thereof. The crystal structure of the single or complex phase of the PVD coating is consistent with or similar to at least one of fcc-TiN or fcc-AlN, and the (111) crystal surface texture coefficient of the coating is larger than 2.5. According to the preparation method, a WC-based hard alloy or a TiCN-based metal ceramic hard material is adopted as a matrix, the target regulation on the surface structure of the coating is realized by carrying out secondary sintering regulation on the matrix of the hard material before coating; and the surface structure of the matrix is changed, so that the nucleation and growth conditions of the PVD coating are changed, the effect that the strong (111) texture is formed is achieved, the service life of a coating cutter is remarkably prolonged, and the requirements for high performance and high service life on the PVD coating cutter of high-efficiency machining of a difficult-to-machine material are met.
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Description

technical field

[0001] The invention relates to a PVD coating with a strong (111) texture and a preparation method thereof, belonging to the technical field of powder metallurgy composite materials and the field of cutting tools. Background technique

[0002] Coated hard materials are composed of two parts: a hard material substrate and a coating. The surface structure of a hard material substrate has an important influence on the nucleation and growth of coatings in direct contact with it. If the coating is a multilayer composite coating, the subsequent growth of the coating will in turn inherit this effect. Changes in the coating nucleation and growth environment can affect the performance of the coating and its cutting tool life.

[0003] WC-based cemented carbide and TiCN-based cermet refer to cemented carbide and cermet with WC and TiCN as main components respectively, which are typical hard materials. Hard materials consist of a hard phase and a ductile binder phase...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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