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利用射频/直流脉冲(RF/DC pulsed)技术,以气体A-C:H(乙炔)为原料,在高速钢基体(HRC65)和汽车活塞销上制备了类金刚石(Diamond-like carbon,DLC)涂层。采用激光Roman光谱仪研究了DLC的结构组成,利用摩擦磨损试验机测试了不同摩擦副在干摩擦和油润滑环境下的摩擦系数及耐磨寿命,最后用光学显微镜观察了汽车活塞销涂层类金刚石前后的表面形貌。结果表明:采用此方法在汽车活塞销上制备的类金刚石涂层光洁度高,摩擦系数小;摩擦副之间的硬度差对其耐磨寿命具有很大的影响,加入润滑剂可以抵消这种影响;汽车活塞销涂层类金刚石在工作一定时间后,表面粗糙度降低,耐磨寿命提高,同时DLC对摩擦副具有抛光润滑作用,是一种汽车零部件优选的抗磨减磨涂层材料。活塞销涂层类金刚石实际装车现场测试表明,寿命比没有涂层的活塞销提高4.5倍,未来可以作为汽车零部件表面的保护涂层。
A diamond-like carbon (DLC) coating was prepared on high-speed steel substrate (HRC65) and automobile piston pin using gas AC: H (acetylene) as raw material by RF / DC pulsed technology . The structure of DLC was studied by laser Roman spectrometer. The friction coefficient and wear life of different friction couple under dry friction and oil lubrication were tested by friction and wear tester. Finally, Before and after the surface morphology. The results show that diamond-like coatings prepared by this method on automobile piston pins have high smoothness and low friction coefficient. The difference in hardness between friction pairs has a great influence on their wear life. Adding lubricant can counteract this effect ; After the work of a certain period of time, the surface roughness of the diamond-like carbon coated with the piston pin of the automobile is reduced, the wear life of the diamond-like diamond is improved, and the friction and wear resistance of the friction pair of the DLC is polished and lubricated. PISTON PIN COATED DIAMOND Actual field test shows that life expectancy is 4.5 times longer than uncoated piston pins and can be used as a protective coating on the surface of automotive components in the future.