LY12Al合金微弧氧化过程中电流和电压变化规律

CHANGING REGULARITY ON CURRENT AND VOLTAGE DURING MICROARC OXIDATION OF LY12 ALLOY

研究和分析了微弧氧化过程中电流和电压变化规律以及微弧产生的机理 .结果表明 ,电压是影响微弧氧化的主要因素之一 ,电压值过高将造成陶瓷膜的破坏 .电流值在微弧氧化过程中的各个阶段相异 .微弧氧化过程具有明显的阶段性 ,可初步分为初始氧化膜形成阶段。

The changing regularity of current and voltage and the producing mechanism of microarc during the microarc oxidation of LY12 alloy were investigated.The results showed that the voltage is one of the main factors during microarc oxidation .The ceramic coating would be destroyed under the condition that voltage was overload .The different electric currents were corresponding to distinct stages.Three distinct stages were observed during microarc oxidation,i.e.The initial stae represents that ceramic coating was produced,the second microarc was aroused and finally the third the steady oxidation stage.