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利用微弧氧化技术对ZL108铝合金活塞第一道环槽进行了陶瓷化处理。研究了电流密度、氧化时间等工艺参数对微弧氧化层厚度的影响规律;研究了电解液旋流循环搅拌对深槽内表面氧化层均匀性的改善作用;与未经微弧氧化处理的ZL108铝合金进行了耐磨性对比试验,并给出了装车运行考核结果。研究结果表明,用微弧氧化技术可以使窄而深的环槽内表面形成均匀的厚度达40μm、耐磨性良好的氧化铝陶瓷涂层,使活塞环槽耐磨损寿命显著提高。
The micro-arc oxidation technology was used to ceramicize the first ring groove of ZL108 aluminum alloy piston. The effects of current density, oxidation time and other process parameters on the micro-arc oxidation layer thickness were studied. The improvement effect of electrolyte circulation on the inner surface oxide layer in the deep groove was studied. Compared with the non-micro-arc oxidation treatment of ZL108 Aluminum alloy wear resistance comparison test, and gives the loading and unloading assessment results. The results show that the micro-arc oxidation technology can make narrow and deep ring groove surface to form a uniform thickness of 40μm, good wear resistance of alumina ceramic coating, piston ring groove wear life significantly increased.