SLM-316L细丝脂润滑摩擦磨损性能  

Tribological properties of the SLM-316L filament under the grease lubrication condition

作　　者：黄明吉[1,2] 韩建磊 董秀萍 HUANG Ming-ji;HAN Jian-lei;DONG Xiu-ping(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shunde Graduate School,University of Science and Technology Beijing,Shunde 528300,China;School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学顺德研究生院,顺德528300 [3]北京工商大学材料与机械工程学院,北京100048

出　　处：《工程科学学报》2021年第6期835-842,共8页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51975042);北京科技大学顺德研究生院科技创新专项资金资助项目(BK19AE007)。

摘　　要：为研究金属橡胶用选择性激光熔融(SLM)技术制备的316L不锈钢细丝在脂润滑条件下的摩擦磨损性能,探讨了不同载荷、不同摩擦速度以及载荷(F)和摩擦速度(v)共同作用的Fv因子对SLM-316L细丝摩擦系数和磨损率的影响规律,利用扫描电镜观察细丝磨损表面形貌,利用能谱仪(EDS)检测磨损表面元素种类与原子分数,分析其磨损机制.结果表明:在脂润滑条件下,摩擦系数随着载荷的增大而减小,磨损率随载荷的增大呈先降后升的趋势.摩擦系数和磨损率均随摩擦速度的增大呈先升后降趋势.低载荷下SLM-316L细丝磨损机制主要为磨粒磨损和轻微的氧化磨损,较高载荷下氧化磨损加剧并伴随疲劳磨损.低摩擦速度下SLM-316L细丝磨损机制主要为疲劳磨损和氧化磨损,较高摩擦速度下氧化磨损减弱,以磨粒磨损为主.摩擦系数随Fv值的增大而减小,磨损率随Fv值的增大呈先升后降再升的变化趋势.因此用SLM-316L细丝制备的金属橡胶在脂润滑条件下最佳工作参数:Fv等于0.04 N·m·s^(−1),即载荷10 N、摩擦速度240 mm·min^(−1).To study the friction and wear properties of 316L stainless steel filaments prepared by selective laser melting(SLM)for metal rubber under the condition of grease lubrication,the friction coefficient and wear rate of SLM-316L filaments under different loads,different friction velocities,and Fv factors of the combined effect with load(F)and friction velocity(v)were discussed.Scanning electron microscope(SEM)was used to observe the surface morphology of filaments after wear,and energy dispersive spectrometer(EDS)was used to detect the element types and atomic percentages of the worn surface.Based on these two methods,the wear mechanism was analyzed.Results show that under the grease lubrication condition and with increased load,the friction coefficient decreases,whereas the wear rate initially decreases and then increases.With increased friction velocity,both the friction coefficient and wear rate tend to initially increase and then decrease.The wear mechanism of SLM-316L filaments under the low load condition is mainly abrasive wear and slight oxidative wear.At a high load,oxidative wear is aggravated and accompanied by fatigue wear.The wear mechanism of SLM-316L filaments at low friction velocities is mainly fatigue wear and oxidative wear.At high friction velocities,oxidative wear weakens,and abrasive wear becomes dominant.With an increased Fv value,the friction coefficient decreases and wear rate tends to initially rise,which then decreases and finally rises again.Therefore,the best working parameter of the metal rubber prepared using SLM-316L filaments under grease lubrication conditions is Fv=0.04 N·m·s^(−1),which means that the load is equal to 10 N and the friction velocity is 240 mm·min^(−1).

关 键 词：摩擦磨损 316L不锈钢丝 选择性激光熔融 脂润滑 金属橡胶 

分 类 号：TH117.1[机械工程—机械设计及理论]