一种热轧430铁素体抗菌不锈钢及其制备方法，属于金属材料领域。其成分为：C≤0.01％；Si≤0.75％；Mn≤1.0％；P≤0.04％；S≤0.03％；Cr16～18％；Ni≤0.6％；Cu 1.8～2.5％；其余为Fe和杂质。制备工艺如下：冶炼→连铸→热轧→抗菌退火。本发明通过在热轧430铁素体不锈钢中添加一定含量的铜，再通过抗菌退火热处理，得到足够多和足够大的铜析出，保证使用过程中能够释放一定量的铜离子，从而赋予热轧板抗菌性能，对大肠杆菌和金黄色葡萄球菌的灭杀率高达99％；由于铜析出在热轧板中是均匀分布的，所以抗菌性能不会随着材料的磨损而消失；通过控制碳含量来避免长时间抗菌退火对不锈钢耐蚀性能造成的恶化。本发明钢种具有持久抗菌性能、抗菌范围广并具有良好的机械性能和抗腐蚀性能。

The invention relates to a hot rolled 430 ferritic antibacterial stainless steel and a preparation method thereof, belonging to the field of metal materials. Its composition is: C ≤ 0.01%; Si≤0.75％； Mn≤1.0％； P≤0.04％； S≤0.03％； Cr16～18％； Ni≤0.6％； Cu 1.8～2.5％； The rest are Fe and impurities. The preparation process is as follows: smelting → continuous casting → hot rolling → antibacterial annealing. The invention adds a certain amount of copper to the hot-rolled 430 ferritic stainless steel, and then obtains enough and large copper precipitation through antibacterial annealing heat treatment, so as to ensure that a certain amount of copper ions can be released during use, so as to endow the hot-rolled plate with antibacterial performance, and the killing rate of Escherichia coli and Staphylococcus aureus is as high as 99%; Because the copper precipitation is evenly distributed in the hot rolled plate, the antibacterial property will not disappear with the wear of the material; The deterioration of corrosion resistance of stainless steel caused by long-time antibacterial annealing can be avoided by controlling the carbon content. The steel grade of the invention has long-lasting antibacterial performance, wide antibacterial range, and good mechanical performance and corrosion resistance.