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Effect of tempering temperature on the microstructure, corrosion resistance, and antibacterial properties of Cu-bearing martensitic stainless steel
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-06-08 , DOI: 10.1002/maco.202112382 Xinxin Hao 1, 2 , Tong Xi 2 , Zhiqiang Xu 3 , Lichu Liu 3 , Chunguang Yang 2 , Ke Yang 2
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-06-08 , DOI: 10.1002/maco.202112382 Xinxin Hao 1, 2 , Tong Xi 2 , Zhiqiang Xu 3 , Lichu Liu 3 , Chunguang Yang 2 , Ke Yang 2
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In this study, the effects of tempering temperature on the microstructure, hardness, antibacterial performance and corrosion resistance of Cu-bearing 5Cr15MoV martensitic stainless steel (5Cr15MoV-Cu MSS) were investigated using an optical microscope, a scanning electron microscope, X-ray diffraction, a transmission electron microscope, an antibacterial test, electrochemical measurements, and the salt spray test. The results showed that the hardness curve had a saddle shape and its values reached the peak value after tempering at 500°C, due to the secondary hardening effect by the precipitation of tiny secondary carbides and Cu-rich precipitates. In addition, the antibacterial results also showed excellent antibacterial performance against Escherichia coli at 500°C because of the formation of Cu-rich precipitates. Results of corrosion tests indicated that the corrosion resistance decreased gradually with an increase of the tempering temperature. In particular, the passivation did not occur when the tempering temperature was above 500°C, which may be related to the Cu-rich precipitates and Cr depletion.
中文翻译：
回火温度对含铜马氏体不锈钢组织、耐蚀性及抗菌性能的影响
本研究采用光学显微镜、扫描电子显微镜、X射线衍射仪等研究了回火温度对含铜5Cr15MoV马氏体不锈钢(5Cr15MoV-Cu MSS)组织、硬度、抗菌性能和耐腐蚀性能的影响。 、透射电子显微镜、抗菌试验、电化学测量和盐雾试验。结果表明，由于微小二次碳化物析出和富Cu析出物的二次硬化作用，硬度曲线呈马鞍形，在500℃回火后其值达到峰值。此外，抗菌结果还显示出对大肠杆菌的优异抗菌性能在 500°C 时，因为形成了富铜沉淀物。腐蚀试验结果表明，随着回火温度的升高，耐腐蚀性能逐渐降低。特别是回火温度高于500℃时没有发生钝化，这可能与富Cu析出物和Cr贫化有关。
更新日期：2021-06-08
中文翻译：
回火温度对含铜马氏体不锈钢组织、耐蚀性及抗菌性能的影响
本研究采用光学显微镜、扫描电子显微镜、X射线衍射仪等研究了回火温度对含铜5Cr15MoV马氏体不锈钢(5Cr15MoV-Cu MSS)组织、硬度、抗菌性能和耐腐蚀性能的影响。 、透射电子显微镜、抗菌试验、电化学测量和盐雾试验。结果表明，由于微小二次碳化物析出和富Cu析出物的二次硬化作用，硬度曲线呈马鞍形，在500℃回火后其值达到峰值。此外，抗菌结果还显示出对大肠杆菌的优异抗菌性能在 500°C 时，因为形成了富铜沉淀物。腐蚀试验结果表明，随着回火温度的升高，耐腐蚀性能逐渐降低。特别是回火温度高于500℃时没有发生钝化，这可能与富Cu析出物和Cr贫化有关。
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