微合金化2205双相不锈钢组织及性能

doi:10.13229/j.cnki.jdxbgxb20190550

摘要/Abstract

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1~6 μm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。

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

Abstract:

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.

Key words: material synthesis and processing technology, Ag-bearing 2205 duplex stainless steel, Ag-bearing phase, mechanical properties, corrosion resistance, antibacterial property

中图分类号:

TG172

向红亮,陈盛涛,邓丽萍,张伟,詹土生. 微合金化2205双相不锈钢组织及性能[J]. 吉林大学学报(工学版), 2020, 50(5): 1645-1652.

Hong-liang XIANG,Sheng-tao CHEN,Li-ping DENG,Wei ZHANG,Tu-sheng ZHAN. Microstructure and properties of microalloying 2205 duplex stainless steel[J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(5): 1645-1652.

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材料	I_corr/(10^-6A?cm^-2)
A	5.416
B	4.829
C	5.208
D	5.592

区域	Cr	Ni	Cu	Ag	Mn	Fe
01	4.34	2.01	5.23	72.67	1.20	6.32
02	5.23	1.52	6.71	75.66	0.98	7.49

材料	R_s/(Ω·cm²)	C/10^-5	R_t/(10⁶Ω·cm²)	n
A	4.102	5.628	5.723	0.865
B	4.308	4.528	6.976	0.874
C	4.124	5.328	6.071	0.863
D	4.174	6.028	5.479	0.870

材料	细菌数/(cfu?ml^-1)			R/%
材料	3 h	12 h	24 h	3 h	12 h	24 h
A	7.15×10⁵	6.62×10⁵	6.98×10⁵	0	0	0
B	7.03×10⁵	4.52×10⁵	4.09×10⁵	0	31.7	41.4
C	5.65×10⁴	＜10	＜10	92.1	＞99.9	＞99.9
D	2.80×10³	＜10	＜10	99.6	＞99.9	＞99.9

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