AZ31镁合金表面液相渗铝的工艺与性能
来源期刊：中国有色金属学报2007年第7期
论文作者：谭成文 郭冠伟 王潇屹 王富耻 才鸿年
文章页码：1053 - 1053
关键词：AZ31镁合金；过共晶渗层；耐蚀性；纳米硬度
Key words：AZ31 magnesium alloy; hypereutectic coating; corrosion resistance; nanoindentation hardness
摘 要：
Abstract: Liquid diffusion technology was used to aluminize on the surface of AZ31 magnesium alloy. The hypereutectic aluminized coating was obtained. The forming mechanism and properties of aluminized coating were studied by analyzing the component, phase state, nanoindentation hardness and corrosion resistance. The results show that a solidification-melting process occurs on the surface of AZ31 magnesium alloy when it is aluminized at 480 ℃. Mg17Al12 and Mg-Al supersaturated solid solution exist in the aluminized coating, and the coating nanoindentation hardness is about 3 times higher than that of AZ31 magnesium matrix, at the same time the corrosion resistance is improved obviously. Aluminizing in liquid phase may improve the diffusion velocity but up-and-down surface is formed due to surface solidification shrinkage from liquid phase, which can be controlled by reducing the cooling velocity.
