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单体铸造活塞环具有组织致密、加工余量小、可以获得没计要求的径向压力分布和弹性保持性好等优点。几年的实践证明,单体铸造活塞环能满足东风4型、北京型机车柴油机和法国AGO柴油机的使用要求,经过喷涂钼基合金或镀铬的240单体铸造活塞环的使用寿命在30万公里以上,最长的已达到55万公里。但是,在活塞环的铸造生产中,如何提高成品率、稳定产品质量和保证较好的寿命,尚有大量工作要做,尤其是活塞环的材料质量、冷热工艺因素与使用性能之间的关系需要进一步探讨,掌握其规律,以指导生产。
Monolithic casting piston ring has the advantages of compact structure, small machining allowance, no radial pressure distribution and good elasticity retention. Several years of practice have proved that the single casting piston ring to meet the Dongfeng 4-type, Beijing locomotive diesel engine and the French AGO diesel engine requirements, after spraying molybdenum-based alloy or chrome-plated 240 single-piece casting piston ring life of 30 million km Above, the longest has reached 550,000 km. However, there is still a great deal of work to be done to improve the yield, stabilize the product quality and ensure a long service life in the production of piston rings. In particular, the material quality of the piston rings, the factors of the hot and cold process and the service performance Relations need to be further explored, to grasp its laws to guide the production.