阳极氧化层对活塞热负荷的影响研究

Influences of Anodic Oxidation Coating on Thermal Loads of Piston

为了探究某发动机铝质活塞阳极氧化对其热负荷的影响,借助硬度塞温度测试法及数值分析手段,分别对该发动机原始活塞和阳极氧化活塞进行温度场和热应力计算分析。结果表明,在最大负荷工况下,阳极氧化活塞最高温度较原始活塞最高温度降低了7.1%,其最大热应力较原始活塞最大热应力减小了24.5%,其他区域温度和热应力均有不同程度的减小。阳极氧化工艺降低了活塞的热负荷,同时有利于增强活塞的可靠性,延长其使用寿命。

In order to investigate heat loads of an engine piston made of aluminum after anodic oxi-dation,both of temperature field and thermal stress of original piston and anodic oxidation piston were researched combined simulation with experiments.It shows that,under peak load conditions,compared with the original piston the highest temperature of anodic oxidation piston is reduced by 7.1%,the maximum thermal stress is reduced by 24.5%,the situations of other points of piston are of the same trends.As a result,heat loads of the piston are decreased after anodic oxidation and it is benefit for thereliability and working life of piston.