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为了适应柴油机高速高负荷的需要,活塞环也须经受更严酷的工况考验。但由于活塞环容易发生折断或在短时期内产生熔着磨损等故障而影响柴油机的正常运转。为了延长环的使用寿命,除提高环的强度和改善环的耐磨性能,在工作面上采用各种高熔点的耐磨表面覆层是当前的一项重要工作。这里仅就VSZ柴油机活塞环的表面覆层试验作个小结。 VSZ柴油机采用钢制氮化缸套,二道气环也均为钢质梯形环。由于钢质缸套内壁表面光滑,不能很好存油,因此,为了保持良好的润
In order to meet the needs of high-speed and high-load diesel engine, piston rings also have to withstand more severe test conditions. However, due to the piston ring is prone to break or melt in the short term wear and tear and other failures affect the normal operation of the diesel engine. In order to extend the service life of the ring, in addition to increasing the ring strength and improve the ring wear resistance, the use of a variety of high melting point wear-resistant surface coating is an important task. Here is a summary of the surface coating test on the piston ring of the VSZ diesel engine. VSZ diesel engine using nitrogen cylinder liner, two gas rings are also trapezoidal steel ring. As the inner surface of the steel cylinder liner smooth, can not be well preserved, therefore, in order to maintain a good run