Antibacterial hard stainless steel tool and preparation method thereof

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.