Antibacterial hard stainless steel tool and preparation method thereof

Abstract

The invention relates to an antibacterial hard stainless steel tool and a preparation method thereof. According to the technical scheme, a stainless steel tool to be processed is vertically arranged upwards in a high energy ion implantation machine with the blade facing upwards, ion cleaning is firstly carried out on the surface of the stainless steel tool to be processed, silver ion implantation is then carried out, then nitrogen ion implantation is carried out, and the antibacterial hard stainless steel tool is obtained. The Cr content of the stainless steel tool to be processed is 12-32wt%, and the working condition of the silver ion implantation is that the acceleration voltage of an ion source is 10-100KV, and the implantation dosage of the silver ion is 5.0*1015 - 1.0* 1019 ions / cm2. The working condition of the nitrogen ion implantation is that the acceleration voltage of an ion source is 10-100KV, and the implantation dosage of the nitrogen ion is 5.0*1015 - 1.0* 1019 ions / cm2. The antibacterial hard stainless steel tool and the preparation method thereof have the advantages of being high in processing speed, simple in machining and free of pollution. The prepared antibacterial hard stainless steel tool is good in abrasive resistance, high in hardness, long in service life, and capable of maintaining the original shape and appearance of the tool, and has good lasting antibacterial performance.

Description

technical field [0001] The invention relates to the technical field of stainless steel cutting tools. In particular, it relates to an antibacterial hard stainless steel knife and a preparation method thereof. Background technique [0002] Stainless steel knives have been widely used in people's production and life. With the improvement of the quality of life, people have higher and higher requirements for the performance of stainless steel. Since the knives are in contact with water or organic matter and other media for a long time in daily life, the knives are easily corroded and bacteria breed, which will affect people's health. In addition, curling or even cracks will occur during use, which will affect the use and appearance of the knives. In order to overcome the hardness problem of stainless steel, nitriding, carburizing or carbonitriding are usually carried out on stainless steel to improve the surface hardness and wear resistance of stainless steel. The existing pro...

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Problems solved by technology

[0005]The above surface treatment methods can change the surface hardness of stainless steel and improve its service life, but these methods have serious shortcomings in the treatment of tool products: ①The high temperature treatment process leads to The blade is deformed, and the vacuum degree is low during work, which leads to surface oxidation, and the sharpness of the tool product treated in this way is reduced; ②Heat treatment and carburizing treatment lead to changes in the surface morphology of the tool, which affects the accuracy and surface finish of the blade, and affects the service life of the tool, especially not Suitable for cutting tools; ③There are many conditions that need to be controlled for infiltration, and the infiltration of carbon and nitrogen is not easy to control, which affects the quality of cutting tool products

[0006] Although adding silver ions to stainless steel can make stainless steel have antibacterial properties, there are many deficiencies: ①The silver-containing stainless steel prepared by adding silver in smelting, because it is in the whole stainless steel Both add silver, which makes the production cost high; ②Add silver ions to the surface of stainless steel by diffusion deposition, usually at high temperature, which is easy to deform the blade and is not suitable for processing tool products; ③Add silver to the surface of stainless steel by ion implantation Ions, because the amount of ion-implanted silver ions is relatively small and the wear resistance of the ion-implanted silver stainless steel surface has not been improved. After a period of use, the silver ions on the surface will fall off and be greatly reduced, and the antibacterial performance will be significantly reduced.

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