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喷镀活塞环的贮油性、耐热性,特别是耐擦伤性强,正受到人们的重视,被用作高负荷活塞环,以代替镀铬环。现在采用的喷镀物有Mo、Wc、金属陶瓷、陶瓷或者它们的混合物。这些喷镀物质耐磨性强的反面是硬度极高,例如Mo达HV700,Wc达HV3000以上。喷镀后的磨削加工极困难,加工能力低、砂轮损耗大,不能重磨削,另外原材料的成本也极高。因而要降低喷镀活塞环的成本,必须尽可能减少喷镀层的磨削余量。实际上,由于喷镀面的凹凸和机械加工余量的关系,需要喷镀上比成品喷镀层约厚一倍的喷镀层。喷镀活塞环成品时喷镀物质的收得率只在50％以下（包括喷镀时的飞散损失）。 日本帝国活塞环公司发明了一种经济性高的喷镀活塞环工艺。将各种喷镀物质特有的喷镀层表面粗糙度的平均尺寸作为成品外
Sprayed piston ring oil storage, heat resistance, especially scratch resistance is strong, people are paying attention to, is used as a high-load piston ring, instead of chrome ring. Now used spray Mo, Wc, cermets, ceramics or their mixture. These spray materials with strong anti-wear the very high hardness, such as Mo up to HV700, Wc up to HV3000. Spraying after grinding extremely difficult, low processing capacity, grinding wheel wear and tear can not be re-grinding, while the cost of raw materials is also very high. Therefore, to reduce the cost of plating piston ring, it is necessary to minimize the grinding margin sprayed. In fact, due to the relationship between the unevenness of the sprayed surface and the machining allowance, it is necessary to spray the sprayed layer that is about twice as thick as the finished sprayed layer. Spraying the piston ring finished products when the rate of material sprayed only 50% (including the spraying of flying loss). Japan Imperial Piston Ring Company invented a high cost of piston plating process. Except for the finished product, the average size of the surface roughness of the sprayed layer, which is unique to various spray materials, is used