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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.
The effects of contact pressure, relative sliding speed, current and arc discharge energy on the temperature rise of carbon skateboard were studied by using high-speed current-carrying friction and wear testing machine. The effects of carbon skateboarding The results show that the temperature rise of the sliding plate increases with the increase of the sliding speed, current and arc discharge energy, and decreases with the increase of the contact pressure.The wear morphology of the carbon sliding plate shows that the temperature rise of the carbon sliding plate is significant Which will affect the abrasion appearance of the skateboard, the more severe the carbon skateboard wear will be with the increase of the temperature.Different temperature rise of the carbon skateboard corresponds to different wear mechanisms: When the temperature rises about 50 ℃, the surface of the carbon skateboard is peeled off Mechanical wear and tear; when the temperature rise is about 90 ℃, the surface of the carbon skateboard is mainly mechanical wear, and a small amount of ablation area appears; when the temperature rise is about 180 ~ 200 ℃, a large amount of ablation area appears on the surface of the carbon skateboard Arc ablation wear mainly; temperature rise at about 300 ℃, carbon skate prone to fatigue cracks, mainly to the ablation of abrasion.