【摘要】 对铸铝合金在水玻璃混合体系中的微弧氧化工艺进行了详细研究。结果表明 ,电解液中的水玻璃成分对于铸铝合金形成微弧氧化膜层具有重要的作用 ,钨酸钠与 EDTA二钠配合使用可以提高膜层的硬度。在水玻璃、钨酸钠、EDTA二钠等组成的混合液体系中 ,采用适当的工艺条件 ,如 ,电流密度为 40 A/ dm2 ,配合强力搅拌 ,可以在铸铝合金表面制得硬度超过 80 0 HV、性能优异的氧化物陶瓷膜更多还原

【Abstract】 Microarc oxidation technology of cast allumium in a mixed water glass electrolyte is investigated in detail. The result shows that the water glass plays a basic role in forming a microarc oxidation film on cast allumium, and the combination of sodium tungstate and disodium EDTA used in the electrolyte can increase the hardness of the film. So, in an electrolyte containing water glass, sodium tungstate, disodium EDTA, with proper technological conditions, such as the current density of 40 A/dm 2 and strong agitation, an excellent metal oxide ceramic film, with the hardness of 800 HV above , could be obtained on the surface of the cast allumium.更多还原