为改善接触线的耐磨性能,在Cu-Ag合金中添加微量Fe元素制备了Cu-Ag-Fe合金接触线,研究了电流强度、滑动速度和载荷对Cu-Ag-Fe合金的磨损形貌及磨损率的影响.实验结果表明：随电流强度、滑动速度和载荷的增加,合金的质量磨损率明显增加.磨损形貌表明,在受电滑动条件下,磨损形式以粘着磨损、磨粒磨损和电侵蚀磨损为主,且随着电流强度的增加,粘着磨损现象加剧.由于Fe元素的时效析出强化作用,Cu-Ag-Fe合金的电磨损性能比Cu-Ag合金高出2倍多,大大提高了该合金的使用寿命.
To improve the wear performance of contact wire of Cu-Ag alloys,trace iron was added,and the influence of electrical current,sliding speed and load on the wear morphology and wear rate of Cu-Ag-Fe alloys were studied.The results show that the wear rates of Cu-Ag-Fe alloys increase with the increasing of electrical current,sliding speed and load.The wear morphologies indicate that the adhesive wear,abrasive wear and electrical erosion are the dominant mechanisms during the electrical sliding processes.And with the electrical current increased,the phenomena of the adhesive wear have intensified.The electrical sliding wear resistance of Cu-Ag-Fe alloys is 2 times of that of Cu-Ag alloys because of the aging strengthening action of iron,which increases the service life of Cu-Ag alloys.
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