一、引言在内烧机工作过程中,活塞环起着密封、调节机油、导热和支承作用;除了承受机械负载、热负荷和气体腐蚀外,主要失效形式是外园柱工作面与气缸套内孔壁摩擦引起的磨损。因此,要提高活塞环质量,应首先着手于提高耐磨性,再兼顾其它。目前普遍采用表面镀铬来取得其高耐磨性,长寿命;但镀铬环存在着三个明显的局限性, I. INTRODUCTION During the working process of the burning machine, the piston ring plays the role of sealing, regulating the oil, conducting heat and supporting functions. In addition to the mechanical load, heat load and gas corrosion, the main failure mode is the outer cylinder face and the cylinder liner Hole wall friction caused wear. Therefore, to improve the quality of the piston ring, should first proceed to improve the wear resistance, and then take into account the other. The current widespread use of surface chrome plating to obtain its high wear resistance, long life; However, there are three obvious chrome ring limitations,