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材料研究学报  2014, Vol. 28 Issue (1): 15-22    DOI: 10.11901/1005.3093.2013.688
  本期目录 | 过刊浏览 |
17-4PH不锈钢的抗菌性能*
王帅1,2,卢志江2,3,杨春光2,沈明钢1,杨柯2()
1. 辽宁科技大学材料与冶金学院 鞍山 114051
2. 中国科学院金属研究所 沈阳 110016
3. 南京理工大学材料科学与工程学院 南京 210094
Antibacterial Performance of 17-4PH Stainless Steel
Shuai WANG1,2,Zhijiang LU2,3,Chunguang YANG2,Minggang SHEN1,Ke YANG2,**()
1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
3. School of Materials and Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094
引用本文:

王帅,卢志江,杨春光,沈明钢,杨柯. 17-4PH不锈钢的抗菌性能*[J]. 材料研究学报, 2014, 28(1): 15-22.
Shuai WANG, Zhijiang LU, Chunguang YANG, Minggang SHEN, Ke YANG. Antibacterial Performance of 17-4PH Stainless Steel[J]. Chinese Journal of Materials Research, 2014, 28(1): 15-22.

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摘要: 

研究了热处理工艺对17-4PH不锈钢抗菌性能的影响。结果表明, 冷处理并在482℃时效能有效提高17-4PH不锈钢的抗菌性能和硬度, 提高时效温度使17-4PH不锈钢的杀菌率增加, 但是其硬度明显降低; 时效时间增加, 杀菌率提高, 但是硬度略有降低。冷处理促进马氏体分解, 位错密度增大, 从而促进了富Cu相的析出。17-4PH不锈钢最优的抗菌热处理工艺制度为: 1040℃固溶处理/0.5 h+液氮冷处理/0.5 h+482℃时效处理/6 h。
关键词 ： 金属材料,  17-4PH钢,  抗菌性能,  富铜相,  冷处理,  硬度    
Abstract：

The antibacterial performance of 17-4PH stainless steel by different heat treatments was investigated. The results show that aging at 482℃ after cryogenic treatment at liquid nitrogen can effectively improve the antibacterial rate and hardness of 17-4PH steel, and the antibacterial rate increased with the increase of both aging temperature and aging time, but the hardness declined. The cryogenic treatment can promote the decomposition of the martensite, and then the dislocation density in 17-4PH steel become larger, which could increase the Cu-rich precipitations in the steel matrix and improve the antibacterial performance of the steel. An optimal antibacterial heat treatment procedure for 17-4 PH steel is recommended as solution treatment at 1040℃/0.5 h+cryogenic treatment/0.5h+aging at 482℃/6 h.
Key words： metallic materials    17-4PH steel    antibacterial performance    Cu-rich precipitation    cryogenic treatment    hardness
收稿日期: 2013-09-22     
基金资助:* 国家九七三计划2012CB619101 和国家自然科学基金51371168 资助项目。
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https://www.cjmr.org/CN/10.11901/1005.3093.2013.688      或      https://www.cjmr.org/CN/Y2014/V28/I1/15

图1  17-4PH抗菌实验后的大肠杆菌菌落照片
Number Heat treatment process Antibacterial rate
a 1040℃×0.5 h solution treatment, water cooling, 482℃×4 h aging treatment，air cooling 22.11%
b 1040℃×0.5 h solution treatment, water cooling, cryogenic treatment with liquid nitrogen for 0.5 h, 482℃×4 h aging treatment, air cooling 88.15％
c 1040℃×0.5 h solution treatment, water cooling, 482℃×6 h aging treatment，air cooling 95.23%
d 1040℃×0.5 h solution treatment, water cooling, cryogenic treatment with liquid nitrogen for 0.5 h, 482℃×6 h aging treatment, air cooling 99.58％
e 1040℃×0.5 h solution treatment, water cooling, 552℃×4 h aging treatment，air cooling 95.23％
f 1040℃×0.5 h solution treatment, water cooling, cryogenic treatment with liquid nitrogen for 0.5 h, 552℃×4 h aging treatment, air cooling 99.58％
g 1040℃×0.5 h solution treatment, water cooling, 552℃×6 h aging treatment, air cooling 99.94％
h 1040℃×0.5 h solution treatment, water cooling, cryogenic treatment with liquid nitrogen for 0.5 h, 552℃×6 h aging treatment, air cooling 99.99％
表1  17-4PH的热处理工艺及处理后对大肠杆菌的杀菌率
图2  杀菌率随时效温度的变化
图3  17-4PH不锈钢的TEM形貌照片
图4  17-4PH不锈钢(552℃时效4 h)中析出相和基体的EDX能谱
Element Precipitation Matrix
Fe 72.9 76.2
Cr Ni 15.1 4.1 15.1 3.9
Cu 7.8 4.0
Nb 0.1 0.2
Total 100.0 100.0
表2  17-4PH不锈钢中析出相及基体成分
图5  不同时效时间的17-4PH 不锈钢对大肠杆菌的杀菌率
图6  冷处理对17-4PH不锈钢抗菌性能影响
图7  17-4PH不锈钢XRD谱
图8  冷处理前后17-4PH不锈钢TEM形貌照片
图9  时效温度对17-4PH不锈钢硬度的影响
图10  时效时间对17-4PH不锈钢硬度的影响
图11  冷处理对17-4PH不锈钢硬度的影响
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