(1. 中國科學院 力學研究所， 北京 100080；
2. 清華大學 工程力學系， 北京 100084)
摘 要: 熱浸鋁鍍層由表面層及過渡層兩部分組成， 兩種層厚所受的影響因素不同， 其中提升速度、 基體表面狀態(tài)、 液態(tài)鋁的粘度和膜冷凝過程中的溫度分布等是影響表面層厚度變化的因素。分析上述諸多影響因素， 得出影響表面層厚度變化的主要因素是液態(tài)鋁的粘度和提升速度， 并建立了流體力學的計算模型。 結果表明： 熱浸鋁表面層厚度和鍍鋁液的粘度系數(shù)與提升速度乘積的平方根成正比，與鍍鋁液密度的平方根成反比。
關鍵字: 熱浸鋁；鍍層； 動態(tài)控制； 流體力學
（1. Institute of Mechanics, Chinese Academy of Sciences， Beijing 100080；
2. Department of mechanics， Tsinghua University， Beijing 100084）
Abstract:Hot dip aluminizing coating consists of surface layer and transition layer, and the thickness of each layer is influenced by respective factors. Drawing velocity, surface state of metal, viscosity of melted aluminum and temperature distribution in the film are possible factors which determine the thickness of surface layer. The viscosity of liquid aluminum and drawing velocity are the main factors to the thickness of surface layer. The fluid dynamics model is established to describe the formation of surface layer, and the thickness of the surface layer can be determined by the viscosity of melted aluminum and drawing velocity through the model. Results show that the thickness of the hot-dip aluminizing surface layer is in proportion to the square root of the product of the melted aluminum viscosity and the drawing velocity, but in inverse proportion to the square root of the melted aluminum density.
Key words: hot dip aluminizing; coating; dynamic control; fluid dynamics
