本发明的目的在于提供一种高抗菌铁素体不锈钢材料及其制备方法，并使其固溶和时效的热处理状态下，具有有效的抵抗高浓度细菌(＞(1‑2)*106 CFU/ml)的功能，显著降低铁素体不锈钢在使用中引发的细菌微生物的腐蚀风险。所述不锈钢的化学成分（重量百分比）为：Cr：17.5‑19.5；Mo:1.9‑2.5；Cu：2.0‑4.5；Ga:1.0‑2.5；N≤0.035；C≤0.025；Si≤1.0；Mn≤1.0；P≤0.04；S≤0.03；余量为Fe。本发明所述抗高菌铁素体不锈钢能够广泛应用于含有细菌的食品、化工行业以及民用的液体输送管道或者贮存容器当中。

The purpose of the invention is to provide a high antibacterial ferritic stainless steel material and its preparation method, and make it have the function of effectively resisting high concentration bacteria (> (1 ‑ 2) * 106 cfu / ml) under the heat treatment state of solid solution and aging, so as to significantly reduce the corrosion risk of bacterial microorganisms caused by ferritic stainless steel in use. The chemical composition（w.t）of the stainless steel is Cr: 17.5 ‑ 19.5; Mo:1.9‑2.5； Cu：2.0‑4.5； Ga:1.0‑2.5； N≤0.035； C≤0.025； Si≤1.0； Mn≤1.0； P≤0.04； S≤0.03； the remainder is Fe. The high bacteria resistant ferritic stainless steel can be widely used in food, chemical industry and civil liquid transmission pipeline or storage container containing bacteria.