固相Fe在高温液相Zn中的溶解行为  

Dissolution Behavior of Solid Iron in Liquid Zinc at High Temperature

作　　者：孔纲[1] 刘仁彬[1] 车淳山[1] 卢锦堂[1] 林德鑫 王霞 黎汉昌 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]广东安恒铁塔钢构有限公司,广东佛山528000

出　　处：《华南理工大学学报（自然科学版）》2011年第11期132-137,154,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国际铅锌研究组织资助项目(ILZRO/IZA/2009023);华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0072)

摘　　要：研究了自然对流条件下固相Fe在高温液相Zn中的溶解行为,并探讨了相应的溶解机制.结果表明:固相Fe浸入液相Zn中,随着温度的升高,Fe在液相Zn中的饱和浓度逐渐增加;溶解速率随液相Zn温度的升高显著增大,在520、560和600℃液相Zn中的溶解速率常数分别为2.1×10-6、5.06×10-6和7.15×10-6 m/s;520℃下,固相Fe在液相Zn中的溶解主要由界面反应和溶质原子在合金相中的扩散控制;560和600℃下则主要由Fe原子通过液相Zn中浓度边界层的扩散所决定.The dissolution behavior of solid iron in liquid zinc at a high temperature under natural convection condition was investigated, and the corresponding dissolution mechanism was discussed. The results show that, when solid iron is immersed into liquid zinc, the saturated concentration of Fe in liquid zinc gradually increases with the temperature, that the dissolution rate greatly increases with the temperature of liquid zinc, that the dissolution rate constants of liquid zinc at 520, 560 and 600 ℃ are respectively 2. 1 × 10-6, 5.06 × 10-6 and 7. 15 × 10 -6 m/s, that the dissolution of solid iron in liquid zinc at 520 ℃ is mainly controlled by the chemical reaction between solid iron and liquid zinc and the diffusion of iron atoms in Fe-Zn alloy layer, while that at 560 and 600 ℃ is controlled by the diffusion of iron atoms across the concentration boundary layer in liquid zinc.

关 键 词：固相铁 热浸镀锌 高温 溶解 溶解速率 扩散 

分 类 号：TG174.443[金属学及工艺—金属表面处理]