Hot-rolled 430 ferrite antibacterial stainless steel and preparation method thereof

Abstract

The invention provides hot-rolled 430 ferrite antibacterial stainless steel and a preparation method thereof and belongs to the field of metal materials. The hot-rolled 430 ferrite antibacterial stainless steel comprises less than or equal to 0.01% of C, less than or equal to 0.75% of Si, less than or equal to 1.0% of Mn, less than or equal to 0.04% of P, less than or equal to 0.03% of S, 16-18% of Cr, less than or equal to 0.6% of Ni, 1.8-2.5% of Cu, and the balance Fe and impurities. The preparation method comprises the following steps of smelting, continuous casting, hot rolling and antibacterial annealing. By adding a certain content of copper into hot-rolled 430 ferrite stainless steel and through antibacterial annealing heat treatment, enough copper big enough is precipitated, and itis ensured that a certain quantity of copper ions can be released in the using process, so that a hot-rolled plate has the antibacterial performance and has the escherichia coli and staphylococcus aureus killing rate reaching up to 99%. Since the precipitated copper is uniformly distributed in the hot-rolled plate, the antibacterial performance cannot disappear along with abrasion to the material. The stainless steel is protected against corrosion resistant performance deterioration caused by long-time antibacterial annealing by controlling the carbon content. The stainless steel provided bythe invention has the advantages of the lasting antibacterial performance, wide antibacterial range and good mechanical performance and corrosion resistance.

Description

technical field [0001] The invention relates to a hot-rolled 430 ferrite antibacterial stainless steel and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] With the progress of society and the improvement of people's living standards, people pay more and more attention to the quality of life and living environment. However, microorganisms are invading people all the time, and the spread and spread of harmful bacteria is a serious threat to people's health. Especially in the fields of food and drinking water, which are closely related to us, bacteria are pervasive. In recent years, there have been many vicious food poisoning and bacterial infection incidents around the world. Even now, global outbreaks of E. coli and bird flu still occur from time to time. Antibacterial and antibacterial sanitation management has become a great concern in today's society. Antibacterial products are also more and more people's attention....

AI Technical Summary

Problems solved by technology

[0010] In the past, everyone focused on the development of cold-rolled sheet 430 ferritic antibacterial stainless steel, which has a long process and high production costs, and most of the products are used for stamping and forming parts.

At present, there are few reports on hot-rolled 430 ferritic antibacterial stainless steel for spoons, forks in daily necessities, and tweezers in the medical industry.

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