热镀铝中硅的影响及其作用机制  

EFFECT OF Si ON HOT DIP ALUMINUM COATING AND MECHANISM

作　　者：张灶利[1] 余宗森[1] 张崇芳[1] 

机构地区：[1]北京科技大学

出　　处：《兵器材料科学与工程》1996年第4期52-55,共4页Ordnance Material Science and Engineering

摘　　要：采用扫描电镜、电子探针及Ｘ射线研究了７２０～７３０℃热浸，纯Ａｌ、Ａｌ＋１．７％Ｓｉ，Ａｌ＋３．６％Ｓｉ三种钢板镀层，结果表明：加Ｓｉ镀层结构改变，并对界面合金层生长有强烈的抑制作用，Ｓｉ量增加抑制作用明显。分析表明，Ｓｉ占据了Ｆｅ２Ａｌ３中Ａｌ原子快速扩散的空位位置，从而导致合金层的缓慢生长。Hot dip coating in a pure and a pure and a silioor-containing(0.7%Si,3.6%Si)aluminum melt have been investigated by SEM,EPMA and XRD.The results show that Si coul strongly reduce the aluminum alloy layer thickness.Analysis reveals that Si atoms occupy the structural vacancies of Fe2Al5 phaes, which has good diffusion for Al atoms,thereforre,it results in growing more slowly for intermediate alloy layers,

关 键 词：热镀铝 硅 金属保护 镀层 热浸法 

分 类 号：TG174.443[金属学及工艺—金属表面处理]