微合金化2205双相不锈钢组织及性能  

Microstructure and properties of microalloying 2205 duplex stainless steel

作　　者：向红亮[1,2] 陈盛涛 邓丽萍[1] 张伟 詹土生[4] XIANG Hong-liang;CHEN Sheng-tao;DENG Li-ping;ZHANG Wei;ZHAN Tu-sheng(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;School of Advanced Manufacturing,Fuzhou University,Jinjiang 362200,China;Technology Center,China Baowu Steel Group,Shanghai 201900,China;Baosteel-desheng Co.,Ltd.,Fuzhou 350600,China)

机构地区：[1]福州大学机械工程及自动化学院,福州350108 [2]福州大学先进制造学院,福建晋江362200 [3]中国宝武钢铁集团有限公司不锈钢技术中心,上海201900 [4]宝钢德盛不锈钢有限公司,福州350600

出　　处：《吉林大学学报（工学版）》2020年第5期1645-1652,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51601039);福建省科技重大专项项目(2017HZ0001-2);福建省2016年产业技术联合创新专项项目(FG-2016001);上海市青年科技启明星计划项目(17QB1400100)。

摘　　要：通过添加Cu-Ag合金颗粒制备了Ag量为0.07%和0.10%的2205固溶双相不锈钢,同时制备了母材2205和含Cu2205固溶材料进行对比分析。利用光学显微镜(OM)、扫描电镜(SEM)、万能拉伸实验机、电化学工作站和覆膜法,对比研究了4种材料的显微组织、力学性能、耐蚀性能和抗菌性能。结果表明:Ag量增加会使组织中α增多,γ减少;两种含Ag材料组织中均存在含Ag相,粒径介于1~6μm的Ag相分布于α基体及α/γ相界处,粒径介于80~400 nm的Ag相分布于γ相中;与母材2205相比,添加Cu可提高材料的抗拉强度,但使其延伸率降低;Ag量增加可同时提高材料的抗拉强度和延伸率;所有材料中,含0.10%Ag量的材料综合力学性能最佳;在3.5%NaCl介质中,含Cu2205材料的耐蚀性能最优,Ag量增加,材料钝化膜稳定性及耐腐蚀性能先提高后降低;含Ag2205材料抗菌率随接触时间延长而提高,高Ag量材料一直都有良好的抗菌性能,母材2205和含Cu2205固溶材料不具备抗菌性能。2205 duplex stainless steels containing 0.07% and 0.01% Ag were respectively prepared by adding Cu-Ag alloy particles. Meanwhile,the base material 2205 and Cu-bearing 2205 were prepared for comparison with Ag-bearing 2205. The microstructure,mechanical properties,corrosion resistance and antibacterial properties of the four materials were investigated by Optical Microscope(OM),Scanning Electron Microscope(SEM),tensile test,electrochemical workstation and film mulching method. Results reveale that the increase of Ag content increases the amount of α phase and decreases the amount of γ phase in the microstructure. Ag-containing phases exist in both Ag-containing materials. Ag-phases with particle sizes ranging from 1 to 6 μm are distributed at the interface of α matrix and in α/γ phase,while Ag-phases with particle sizes ranging from 80 to 400 nm are distributed in γ phase. Compared with base material 2205,adding of Cu can improve the tensile strength of the materials,but decrease its elongation. The tensile strength and elongation of the materials both increase with the Ag content. The material containing 0.1%Ag exhibits the best comprehensive mechanical properties. In 3.5% NaCl medium,Cu-bearing 2205 exhibits the best corrosion resistance. With the increase in Ag content,the stability and corrosion resistance of passivation film first increases and then decreases. The antibacterial rate of Ag-bearing 2205 materials increases with the contact time. The high Ag-bearing materials exhibit a good antibacterial property,and the base material 2205 and Cu-bearing 2205 do not have antibacterial properties.

关 键 词：材料合成与加工工艺 含Ag2205双相不锈钢 含Ag相 力学性能 耐蚀性能 抗菌性能 

分 类 号：TG172[金属学及工艺—金属表面处理]