不锈钢表面热镀铝试验研究  

Research of hot-dip aluminized coating on ferrite stainless steel

作　　者：赵红利[1] 胡毅[2] 胡明志 罗成[1] 

机构地区：[1]湖北汽车工业学院材料学院,湖北十堰442002 [2]江西财经大学会计学院,江西南昌330013 [3]东风活塞轴瓦有限公司,湖北十堰442003

出　　处：《焊接技术》2016年第7期54-57,5,共4页Welding Technology

基　　金：湖北省科技支撑计划项目(2014BAA065)

摘　　要：通过对铁素体不锈钢表面进行热浸镀铝及高温氧化扩散,研究浸镀温度、浸镀时间对镀层厚度的影响,采用金相显微镜、扫描电镜、能谱等研究手段,检测分析了镀层的厚度、显微形貌以及成分。结果表明,镀层中主要包含富铝层和铁铝合金层两部分,铝铁合金层的厚度随浸镀温度和浸镀时间的增加而增加。通过高温氧化扩散,富铝层消失,合金层厚度进一步增加,合金层中各元素的浓度梯度变缓,镀层表面的显微硬度提高。The effect of hot-dip aluminizing temperature and immersion plating time on the coating thickness of ferrite stainless steel was researched. the thickness of the coating, microstructure morphology and compositions were studied using optical microscopy, scanning electron microscopy, spectroscopy respectively. The results showed that the coating contained alloy-rich layer and Fe-Al alloy layer. The thickness of the Fe-Al alloy layer increased with increasing the temperature and the time. During high temperature diffusion, the alloy-rich layer vanished and the thickness of the coating grew furthermore. Element concentration gradient went down and micro-hardness of the surface coating rose.

关 键 词：铁素体不锈钢 热浸镀铝 镀层 高温扩散 

分 类 号：TG174[金属学及工艺—金属表面处理]