Water erosion mechanism of mild carbon steels induced by micro-particles  

作　　者：XU WanLi QIN Li WANG JiaDao CHEN HaoSheng CHEN DaRong 

机构地区：[1]State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Science Bulletin》2009年第24期4577-4582,共6页

基　　金：Supported by the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070003103);National Basic Research Program of China (Grant No. 2007CB707702)

摘　　要：To clarify the water erosion mechanism of the mild carbon steels, the water erosion experiments were performed by using deionized water as steam source. The results showed that under the damage threshold velocity of liquid impact, the material surface would not be destroyed. However, when the micro-particles were added into the steam, the pits appeared on the surface soon. By comparison, it is found that the pits are quite different from those induced by micro-particles impact without steam, but similar to those induced by cavitation erosion. The results indicated that the water erosion mechanism was similar to that of cavitation erosion under the damage threshold velocity. The micro-particles carry the micro-bubbles to approach the surface of the material, and the micro-bubbles collapse and generate micro-jet to impinge vertically on the surface, which lead to the produce of pits.To clarify the water erosion mechanism of the mild carbon steels, the water erosion experiments were performed by using deionized water as steam source. The results showed that under the damage threshold velocity of liquid impact, the material surface would not be destroyed. However, when the micro-particles were added into the steam, the pits appeared on the surface soon. By comparison, it is found that the pits are quite different from those induced by micro-particles impact without steam, but similar to those induced by cavitation erosion. The results indicated that the water erosion mechanism was similar to that of cavitation erosion under the damage threshold velocity. The micro-particles carry the micro-bubbles to approach the surface of the material, and the micro-bubbles collapse and generate micro-jet to impinge vertically on the surface, which lead to the produce of pits.

关 键 词：腐蚀机理 钢水 诱导 微颗粒 微观粒子 碳 阈值速度 冲击损伤 

分 类 号：O482.5[理学—固体物理] TE986[理学—物理]