冲蚀速度对Q235钢表面热浸镀铝锰层的冲蚀磨损性能的影响  

Effects of Erosion Rate on Erosion-corrosion Behavior of Hot-dipping Al-Mn Alloy Coating on Q235 Steel Surface

作　　者：董晓锋[1] 李新梅[1] 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830008

出　　处：《热加工工艺》2011年第24期153-155,共3页Hot Working Technology

基　　金：中国博士后基金特别资助项目(201003708);中国博士后科学基金资助项目(20090451427);新疆自治区高校科研计划青年教师科研培育基金项目(XJEDU2009S03)

摘　　要：针对新疆沙漠戈壁盐渍土壤、酸雨及高矿化度盐碱水质对钢铁材料腐蚀性强的特点,采用热浸镀铝锰合金层工艺对Q235钢表面进行改性,在Q235钢表面获得Al-Mn合金镀层。采用扫描电镜、能谱仪及X射线衍射对镀层的组织结构、成分形貌进行了分析,并对改性层的冲蚀磨损性能进行研究,获得了镀层在不同速度下的冲蚀磨损量。结果表明:纯铝镀层表面呈枝晶状,铝锰合金镀层出现了块状的铝锰化合物相,铝锰合金镀层是由Al、FeAl3、Fe2Al5和MnAl6相组成。在不同的冲蚀速度下,铝锰合金镀层的质量损失均小于纯铝合金镀层的质量损失,因此这种热浸镀铝锰合金镀层具有优良的耐冲蚀磨损性能。According to the serious corrosion of steel material under the desert, Gobi, saline soil, acid rain and high salinity water quality in Xinjiang, the Q235 steel was modified by hot-dip-aluminizing technique, and A1-Mn alloy coating was obtained on the Q235 steel surface. The surface morphology and phase component of the coating were investigated by SEM, EDS and XRD. The erosion-corrosion behavior was studied and the erosion rates at different speeds were obtained. The results show that the surface of the obtained pure aluminum coating is acicular, while blocks A1-Mn compound phase exists in A1-Mn alloy coating, and the A1-Mn alloy coating is composed of A1, FeA13, Fe2A15 and MnA16 phases. The erosion mass loss of the A1-Mn alloy coating is less than that of pure aluminum layer at different erosion rates, so the hot-dipping AI-Mn alloy coating has excellent erosion-corrosion resistance.

关 键 词：热浸镀 Al-Mn合金镀层 冲蚀磨损性能 微观结构 

分 类 号：TG174.443[金属学及工艺—金属表面处理]