Superhard nanometer composite cutter and manufacturing method and application thereof

Abstract

The invention discloses a superhard nanometer composite cutter and a manufacturing method and application thereof. The method comprises the following steps: 1) cutter washing, namely, keeping the surface of a cutter base body dry and clean; 2) vacuumizing treatment, namely, assembling the cutter base body on a rotating frame of a film coating device; positioning the rotating frame in a closed film coating device which is prepared through a Cr target material and an AlCr target material; vacuumizing a vacuum chamber; starting a heater for increasing the temperature; and controlling the temperature in the film coating device to be 420-550 DEG C; 3) ionic washing, namely, charging argon into the vacuum chamber; performing glow washing on the surface of the cutter base body; and closing argon; 4) preparing of a combination coating, namely, opening the Cr target material and electric arc; controlling the current of the electric arc to be 400-800A; and charging nitrogen to deposit a CrN combination coating on the surface of the cutter base body; and 5) preparing of a nanometer composite coating, namely, closing the Cr target material; opening the AlCr target material; controlling the electric arc current to be 400-800A; and depositing the AlCrN nanometer composite coating on the surface of the CrN combination coating.

Description

technical field [0001] The invention relates to the technical field of tool coating, in particular to a superhard nano-composite tool and its manufacturing method and application. Background technique [0002] As a basic industry, the manufacturing industry is undergoing revolutionary changes, and the manufacturing technology has also undergone qualitative changes. Especially in recent years, with the rapid development of the machinery industry, the difficulty of machining has become more and more difficult, and the requirements for machining accuracy have become higher and higher. The composite cutting tools on the automatic line must not only meet the production cycle requirements, but also have reliability and long life. In order to meet the needs of development, it is necessary to reform and innovate the traditional old-fashioned composite tools, and it is necessary to apply new technologies and new materials to improve the performance of composite processing tools; nano...

AI Technical Summary

Problems solved by technology

[0003] Due to the poor thermal conductivity of existing steel materials, high plasticity, and severe cutting adhesion, etc., the tool wears too quickly, the processing efficiency is reduced, and the cost is increased. Moreover, PVD / CVD coated tools have high surface hardness, high wear resistance, Stable chemical properties, small friction coefficient and other characteristics, compared with uncoated tools, the tool life can be increased by more than 3-5 times during cutting, and it is currently the first choice for processing such difficult-to-machine materials, although the coating has good cutting properties performance, which can effectively improve the tool performance, but with the requirements of modern manufacturing on material processing efficiency and quality, the cutting conditions of difficult-to-machine materials are becoming more and more stringent, and the continuous development of tool coating materials and technologies is required to improve coating quality to meet the increasingly demanding requirements; and during the production process of traditional composite tools, the ionization rate of arc ion plating technology is high, and an ionization rate close to 90% can be obtained, but there is a problem of droplets, which makes the coating The surface of the layer is rough, resulting in an excessive coefficient of friction of the coating

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