摘要
使用高速载流摩擦磨损试验机,研究了碳滑板与接触线电滑动摩擦时接触压力、相对滑动速度、电流和电弧放电能量变化对碳滑板温升的影响,比较了不同温升时碳滑板的磨损形貌.结果表明：滑板的温升随滑动速度、电流、电弧放电能量的增加而增加,随接触压力的增加而减小.碳滑板的磨损形貌观察显示：碳滑板的温升会显著影响滑板的磨损形貌,随着温升的增加,碳滑板的磨损就越严重.碳滑板的不同温升对应着不同的磨损机制：温升50℃左右时,碳滑板表面以片状剥离的机械磨损为主;温升90℃左右时,碳滑板表面以机械磨损为主,并出现少量的烧蚀区域;温升在180~200℃左右时,碳滑板表面出现大量的烧蚀区域,以电弧烧蚀磨损为主;温升在300℃左右时,碳滑板易出现疲劳裂纹,以电弧烧蚀磨损为主.
A series of experimental tests on the temperature rise of a carbon strip under different electric sliding parameters were carried out using a high-speed electric sliding test machine. The results show that the temperature rise increased with increasing sliding speed, electric current and arc discharge energy, while it decreased with increasing contact force. The observation of the worn surfaces of the carbon strip indicates that the temperature rise of the carbon strip had a large influence on the morphology of the carbon strip, i.e. the higher the carbon strip, the severer the wear of the carbon strip. The wear mechanisms of the carbon strip were different under different temperature rises. At a temperature rise of 50 ℃, the wear of the carbon strip was mainly caused by exfoliating mechanical wear. At a temperature rise of 90℃, the main wear of the contact strip was mechanical wear with slight electric ablation. The arc erosion wear was the main wear mechanism at temperature rises between 180 ℃ and 200 ℃ with a large arc erosion area.When the temperature rise was up to 300 ℃, fatigue cracks were observed and arc erosion was the main wear mechanism.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2015年第6期677-683,共7页
Tribology
基金
国家自然科学基金(U1234202)
四川省科技支撑计划项目(2011FZ0052)资助
关键词
摩擦磨损
温升
电烧蚀
碳滑板
friction and wear, temperature rise, arc erosion, carbon strip
