摘要
为了研究压铸镁合金AZ91D微弧氧化膜层显微硬度,在三种溶液及不同电参数条件下制备了微弧氧化膜层,分析了脉冲频率、占空比、电压、溶液成分及其电导率等参数对膜层显微硬度的影响。试验结果表明,镁合金微弧氧化处理可使其表面硬度大幅提高。锆盐溶液处理膜层的显微硬度高,与膜层相组成中含有ZrO2陶瓷有关。电源脉冲频率、占空比、电压、处理时间参数的增加,都使镁合金微弧氧化膜层的显微硬度增加。在一定范围内增加溶液的电导率,可使膜层的显微硬度提高。
The micro hardness of micro-arc oxidation（MAO） films on AZ91D die-casting magnesium alloy was tested in this paper. The MAO films were processed in three solutions with different electrical parameter. The effects of pulse frequency, duty ratio, voltage, proceeding time and solution conductivity on the micro hardness of MAO films were analyzed. The results show that the micro hardness of die-casting magnesium alloy increase obviously by MAO processing. The films processed in zircon salt solution exhibit a much higher micro hardness, and this can be explained the fact that there is a ZrO2 phase in the films. The micro hardness of MAO films increase with raising the parameters such as pulse frequency, duty ratio, voltage, proceeding time and solution conductivity.
出处
《铸造技术》
CAS
北大核心
2009年第7期911-914,共4页
Foundry Technology
关键词
微弧氧化
镁合金
显微硬度
Micro-arc oxidation
Magnesium alloy
Micro hardness
