退火工艺对高纯铝箔微观组织及织构影响的研究

发布时间：2018-03-08 21:09

  本文选题：高纯铝箔　切入点：再结晶退火　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：高纯铝箔是制造高压电解电容器阳极的主要箔材,具有高{001}100立方织构含量和组织均匀的高纯铝箔,通过电化学腐蚀能在不改变电容器体积的情况下大大提高电容器比表面积,因此组织均匀性、立方织构是影响电容器阳极铝箔比电容的一个重要因素。高纯铝箔的实际生产中,在轧制变形工艺一定的情况下,主要通过退火工艺的控制,改善组织的均匀性,提高立方织构含量。因此,研究退火工艺对高纯铝箔微观组织和织构的影响,弄清材料微观组织和织构的演变规律具有十分重要的理论意义和实用价值。本文以高纯铝箔为研究对象,在其轧制过程中,采用附加中间退火和不附加中间退火两种路径进行工艺试验,研究了不同退火温度、成品退火的加热方式和加热速度对高纯铝箔微观组织及结构的影响,运用金相、X-射线衍射和电子背散射衍射等分析技术,系统地分析了不同退火工艺条件下高纯铝箔的再结晶形核和长大规律,晶粒大小和分布,晶粒取向,织构的演变规律。研究结果表明:1、在高纯铝箔轧制过程中不附加中间退火,经180℃/h随炉升温和到温入炉两种方式加热到500℃进行成品退火的高纯铝箔均发生了完全再结晶,{001}100立方取向的晶粒优先形核并生长,{001}100立方织构是主要的织构组分;2、利用到温入炉加热方式进行成品退火的高纯铝箔产生了再结晶晶粒的异常长大现象,而随炉升温进行退火的材料中晶粒尺寸比较细小且组织均匀性好;3、在高纯铝箔的轧制过程中,分别采用175℃和190℃进行中间退火2h,在相同的成品退火工艺条件下,175℃的中间退火的材料组织更加均匀,且立方织构含量高;4、在相同的轧制和中间退火工艺条件下,随着成品退火加热速度的提高,高纯铝箔的再结晶晶粒尺寸逐渐减小,但是立方织构含量降低。
[Abstract]:High purity aluminum foil is the main foil for making anode of high voltage electrolytic capacitor. It has high {001} 100 cubic texture content and uniform structure. By electrochemical corrosion, the specific surface area of capacitor can be greatly improved without changing the volume of capacitor. Therefore, the microstructure homogeneity and cubic texture are important factors affecting the specific capacitance of the anode aluminum foil of capacitor. In the actual production of high purity aluminum foil, the annealing process is mainly used to control the rolling deformation process. The effect of annealing process on microstructure and texture of high purity aluminum foil was studied. It is of great theoretical significance and practical value to understand the evolution of microstructure and texture of materials. The effects of annealing temperature, heating mode and heating rate of finished product on microstructure and structure of high purity aluminum foil were studied by using two paths of additional intermediate annealing and no additional intermediate annealing, and the effects of different annealing temperature and heating rate on the microstructure and structure of high purity aluminum foil were studied. By means of metallographic X-ray diffraction and electron backscattering diffraction, the recrystallization nucleation and growth law, grain size and distribution, and grain orientation of high purity aluminum foil under different annealing conditions were systematically analyzed. The evolution of texture. The results show that there is no intermediate annealing in the high purity aluminum foil rolling process. The high purity aluminum foil annealed at 500 鈩，

本文编号：1585552