Cu含量对UNS S33207特超级双相不锈钢组织、抗菌性和耐蚀性的影响  

Effect of Cu content on microstructure, antibacterial and corrosion resistance of UNS S33207 hyper-duplex stainless steel

作　　者：向红亮[1,2,3] 饶少辉 郑开魁 刘东[1] XIANG Hongliang;RAO Shaohui;ZHENG Kaikui;LIU Dong(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China;School of Advanced Manufacturing,Fuzhou University,Jinjiang 362200,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108 [2]中国福建光电信息科学与技术创新实验室(闽都创新实验室),福建福州350108 [3]福州大学先进制造学院,福建晋江362200

出　　处：《中南大学学报（自然科学版）》2022年第8期2886-2897,共12页Journal of Central South University:Science and Technology

基　　金：福建省数字化装备与柔性制造创新中心创新基金资助项目(CXZX-202001);闽都创新实验室自主部署科研项目(2021ZZ123);福州市科技计划项目(2020-GX-22);福州市科技计划项目(2020-PT-148);泉州市科技计划项目(2020C043R)。

摘　　要：通过向UNS S33207特超级双相不锈钢中添加不同含量的Cu并经固溶加抗菌时效处理,制备不同类抗菌特超级双相不锈钢材料。利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、覆膜法、ICP-MS质谱检测仪、电化学测试等方法研究Cu含量对UNS S33207组织、抗菌性和耐蚀性的影响。研究结果表明,富铜相析出量随着Cu含量的增加而增多;当Cu含量低于2.55%(质量分数)时,富铜相优先在铁素体及相界析出,进一步增加Cu含量,奥氏体也会析出富铜相;铁素体中析出的富铜相的尺寸为几十纳米,形态呈球状或椭球状,具有稳定的FCC结构,与基体为非共格关系。随Cu含量的增加,Cu离子溶出率增大,抗菌性能提高,且其抗菌率随与菌液作用时间的延长而增大。富铜相会成为钝化膜中的薄弱点,其含量越多,耐蚀性能越差,因此,在确保正常相关性能时,Cu含量要适当。Different types of antibacterial super duplex stainless steel materials were prepared by adding different contents of Cu to UNS S33207 super duplex stainless steel and undergoing solid solution and antibacterial aging treatment. The optical microscope(OM), scanning electron microscope(SEM), transmission electron microscope(TEM), coating method, ICP-MS mass spectrometer, electrochemical test and other methods were used to study the effect of Cu content on the organization, antibacterial and corrosion resistance of UNS S33207 material. The results show that the number of precipitated copper-rich phases increases with the increase of Cu content;when the Cu content is less than 2.55%(mass fraction), the copper-rich phases preferentially precipitate in the ferrite and phase boundaries. When the Cu content is further increased, the copper-rich phase will precipitate in the austenite;the size of the copper-rich phase precipitated in the ferrite is tens of nanometers, and the shape is spherical or ellipsoidal with a stable FCC structure, and the matrix is a non-coherent relationship. With the increase of Cu content, the dissolution rate of Cu ions increases, which results in the increase of antibacterial performance of the material, and its antibacterial rate increases with the prolongation of the action time with the bacterial liquid. The the copper-rich phase is a weak point in the passivation film. The more its content, the worse the corrosion resistance of the material. The Cu content should be appropriate to ensure the normal and relevant performance of the material.

关 键 词：特超级双相不锈钢 CU含量 富铜相 抗菌性能 耐蚀性能 

分 类 号：TG249.5[机械工程—精密仪器及机械]