ZrSiCN nano-composite gradient coating cutter and preparation process thereof

Abstract

The invention belongs to the technical field of fabrication of mechanical cutting tools and particularly relates to a ZrSiCN nano-composite gradient coating cutter and a preparation process thereof. The ZrSiCN nano-composite gradient coating cutter is fabricated by the aid of multi-arc ion plating and a medium frequency magnetron sputtering deposition coating film method; a ZrSiCN nano-composite gradient layer is designed on the surface of the cutter; a Zr and ZrSiC transition layer is arranged between the ZrSiCN nano-composite gradient layer and a cutter substrate. The ZrSiCN nano-composite gradient coating is high in hardness and oxidation resistance and low in friction coefficient, and during cutting, cuttings adhesion, friction, cutting force, cutting temperature and cutter wear can be reduced and the service life of the cutter can be prolonged. The ZrSiCN nano-composite gradient coating cutter is widely applicable to dry cutting and cutting of hard-to-machine materials.

Description

1. Technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a ZrSiCN nanocomposite gradient coating tool and a preparation process thereof. 2. Background technology [0002] Adding Si element to TiN, CrN, ZrN and other binary nitride coatings can make amorphous Si 3 N 4 Nanocrystalline TiN, CrN, and ZrN phases are embedded in the matrix to form a nanocomposite structure. The addition of Si element makes the coating grains finer, the hardness is enhanced, and the high temperature oxidation resistance is improved, so that the coating performance is greatly improved. improve. However, the friction coefficient of MeSiN coating itself is still high, which limits its application in coated tools. [0003] C-containing nitride coatings such as TiCN and ZrCN coatings have the advantages of high strength and good wear resistance, and the addition of C element can form a self-lubricating amorphous carb...

AI Technical Summary

Problems solved by technology

However, the friction coefficient of MeSiN coating itself is still high, which limits its application in coated tools.

[0003] C-containing nitride coatings such as TiCN and ZrCN coatings have the advantages of high strength and good wear resistance, and the addition of C element can form a self-lubricating amorphous carbon self-lubricating layer in the chip contact area, thereby Reduce cutting force and cutting temperature, but poor thermal hardness, poor oxidation resistance, not suitable for high-speed cutting

[0004] Chinese patent (application number: 201310175456.7) reports TiSiN+ZrSiN composite nano-coating tool and its preparation method. This patent improves the friction performance of Si-containing nitride coating by depositing ZrSiN layer on TiSiN layer, but simply uses Si-containing The friction coefficient of nitride coating is still high, and the friction reduction effect is not obvious

The literature [ThinSolidFilms.2006,496:445-449] reported the preparation and friction properties of Zr-Si-N coatings. When the content of Si element increased to 7.6at.%, the friction coefficient of the coating and 100Cr6 steel balls The lowest value is 0.2, but at this time the reduction of the coating friction coefficient is at the expense of the reduction of the coating hardness, and the overall performance of the coating is not optimal

Literature [AppliedSurfaceScience.2015,327:350-357] reported self-assembly nc-ZrCN / a-CN x The mechanical properties of nanocomposite coatings, but the N element content of this coating only accounts for 7-9 at.%, the C element content is between 42-61 at.%, and the C element content is relatively high, which increases the brittleness of the coating.

Images