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针对船舶柴油机的缸套-活塞环摩擦磨损控制问题,利用热涂层技术在缸套表面喷涂3Cr13涂层,并利用机械加工技术进行凹坑纹理处理。对不同缸套试样在MWF-10摩擦磨损试验机上开展不同载荷下的摩擦磨损试验。利用摩擦系数、磨损量以及磨损表面形貌等特征参数来分析表面处理方式对其摩擦性能的影响。结果表明:在三种载荷下,喷涂3Cr13涂层与凹坑纹理协同处理的试样摩擦性能最为优异;表面经过单一凹坑处理或表面喷涂3Cr13涂层也可改善缸套表面的摩擦性能,但效果不如二者协同处理。在高载(600 N)下,经过单一凹坑处理的试样摩擦性能恶化。
Aiming at the friction and wear control of cylinder liner - piston ring of marine diesel engine, 3Cr13 coating was sprayed on the surface of cylinder liner by thermal coating technology and the pit texture was processed by mechanical processing technology. The friction and wear tests of different liner samples on MWF-10 friction and wear tester were carried out under different loads. The friction coefficient, wear amount and wear surface morphology were used to analyze the influence of surface treatment on the friction performance. The results show that under the three kinds of loads, the coating with 3Cr13 coating co-treatment with the dimple texture has the best friction performance. The single dimple treatment or the surface coating with 3Cr13 coating can also improve the friction performance of the cylinder liner surface. However, The effect is not as good as the two co-processing. Under high loading (600 N), the single-pit-treated specimens suffered from deteriorating friction properties.