SiZrCN gradient composite coating cutter and preparation method thereof

Abstract

The invention belongs to the field of mechanical manufacture cutting cutters, and in particular relates to a SiZrCN gradient composite coating cutter and preparation method thereof. The coating is the SiZrCN gradient composite coating prepared by adopting a composite coating method of unbalanced magnetron sputtering and electric arc plating; the surface of the coating cutter is SiZrCN gradient composite coating with gradually-changed gradient of nitrogen content, a Ti transition layer and a SiZrC transition layer are sequentially arranged between a cutter base body and the coating. By adopting the SiZrCN ultra-hard carbon-nitrogen compound coating, because two metals including Si and Zr are added in the coating at the same time, the nitrogen content of the coating structure component is gradually changed in a gradient manner, so that the cutting machining performance of the cutter can be improved. The coating has high hardness and heat stability, and also has good diffusion prevention and wear prevention performances, good plastic deformation resistance ability and excellent friction and wear resistance property. In the cutting process, the cutter can effectively prevent the occurrence of cracking of cutting edges and hot cracks, guarantee the machining surface quality of the workpieces, and prolong the service life of the cutter by more than 70%.

Description

technical field

[0001] The invention belongs to the field of machine-made metal cutting tools, in particular to a SiZrCN gradient composite coating tool and a preparation method thereof. Background technique

[0002] Modern metal cutting requires cutting tools to have excellent characteristics such as high cutting speed, high feed rate, long life, and high precision. As traditional tool materials, high-speed steel or hard alloy is becoming more and more difficult to meet the development needs of modern machining industry. Therefore, tool surface coating technology came into being. Tool surface coating technology is a material surface treatment technology developed in recent decades. Under proper technological conditions, the coating has high hardness, low friction coefficient, and good bonding force with the base material, so the service life of metal cutting tools can be greatly improved. At present, the use of coated tools in industrially developed countries has account...

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