【摘要】 本文以连续碳纤维和短切纤维为增强相,利用热压技术制备了碳纤维增强受电弓滑板。对试样进行电阻测试、冲击试验以及载流磨损试验,利用SEM对冲击断面和磨损形貌进行观察。结果表明,实验制备的受电弓滑板的电阻率低、抗冲击性能良好,具有良好的抗折抗压能力,能够满足国标对目前广泛使用的受电弓滑板的性能需求;试样的磨损率随着载流密度的提高而逐渐增大,摩擦系数逐渐减少;磨损率随着摩擦速度的增加有所增大,基本呈线性增长;在定载荷70N的条件下,v≤20m/s,J≤80A/cm2时,载流效率均高于75%;且随着电流密度以及摩擦速度的增加,载流效率降低;在J=80A/cm2条件下,载流效率随着载荷的增加而明显变好。碳纤维增强受电弓滑板的载流摩擦磨损形式为粘着磨损、电弧烧蚀氧化磨损以及磨粒磨损。更多还原

【Abstract】 The carbon fiber reinforced contact strip(CFRCS) were fabricated by hot pressing with modified continuous carbon fiber as reinforcing phase.The impact toughness,electric resistance and wear resistance of the contact strip were tested.The structural characteristics were investigated by scanning electron microscopy(SEM).The results show that the resistivity of CFRCS is low,impact resistant performance and bending compressive ability is good,which can meet the national standard of contact strips’ requirements.The wear rate of sample increases gradually with the increase of current density and the friction coefficient gradually reduce.Wear rate along with the increase of friction velocity is basic linear growth.In the conditions of load=70N,v≤20m/s,J≤80A/cm2,current efficiency is higher than 75%;And current efficiency reduces with the current density and friction velocity increasing;current efficiency increases obviously with the increase of load with J=80A/cm2.In addition,adhesive wear,arc oxidation wear and abrasive wear are the main wear form of CFRCS.更多还原