钛合金超声辐射杆在高温铝熔体中的腐蚀行为研究  

Research on Corrosion Behavior of Titanium Alloy Ultrasonic Radiator Used in Aluminum Melt at High Temperature

作　　者：彭搏涛 李晓谦[1,2] 张立华[1,2] 董方[1,2] 蒋日鹏[1,2] 李瑞卿[1,2] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《热加工工艺》2017年第6期119-122,共4页Hot Working Technology

基　　金：国家自然科学基金面上项目(CX2011B090);国家973计划资助项目(2012CB619504)

摘　　要：利用高分辨扫描电镜(HR-SEM)观测钛合金超声辐射杆在铝熔体中的腐蚀形貌。研究发现:在超声辐射杆与高温铝熔体接触面形成金属间化合物Al_3Ti;超声波可将Al_3Ti剥离,会加速辐射杆的腐蚀进程;辐射杆表面粗糙度越小,铝熔体与辐射杆表面接触的面积越小,这将有利于阻止铝钛原子间的扩散,有助于延长辐射杆的工作寿命。The corrosion behavior of ultrasonic radiator in high temperature aluminum melt was investigated by using high-resolution scanning electron microscopy （HR-SEM）.The results show that intermetallic compound （Al3Ti） forms at the contact interface between ultrasonic radiator and Al melt. Al3Ti intermetallic particles are stripped away by ultrasonic wave, which can accelerate the corrosion process of the radiator. The smaller the roughness value of the ultrasonic radiator is, the less the contact interface of Al melt and radiator becomes, which is benefit for suppressing the diffusion of Al and Ti atoms and extending the service time of ultrasonic radiator.

关 键 词：超声辐射杆 高温铝熔体 剥离 AL3TI 粗糙度 

分 类 号：TB55[理学—物理] TG146.23[理学—声学]