本文選題：高純鋁箔　切入點(diǎn)：再結(jié)晶退火　出處：《重慶大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：高純鋁箔是制造高壓電解電容器陽極的主要箔材,具有高{001}100立方織構(gòu)含量和組織均勻的高純鋁箔,通過電化學(xué)腐蝕能在不改變電容器體積的情況下大大提高電容器比表面積,因此組織均勻性、立方織構(gòu)是影響電容器陽極鋁箔比電容的一個(gè)重要因素。高純鋁箔的實(shí)際生產(chǎn)中,在軋制變形工藝一定的情況下,主要通過退火工藝的控制,改善組織的均勻性,提高立方織構(gòu)含量。因此,研究退火工藝對高純鋁箔微觀組織和織構(gòu)的影響,弄清材料微觀組織和織構(gòu)的演變規(guī)律具有十分重要的理論意義和實(shí)用價(jià)值。本文以高純鋁箔為研究對象,在其軋制過程中,采用附加中間退火和不附加中間退火兩種路徑進(jìn)行工藝試驗(yàn),研究了不同退火溫度、成品退火的加熱方式和加熱速度對高純鋁箔微觀組織及結(jié)構(gòu)的影響,運(yùn)用金相、X-射線衍射和電子背散射衍射等分析技術(shù),系統(tǒng)地分析了不同退火工藝條件下高純鋁箔的再結(jié)晶形核和長大規(guī)律,晶粒大小和分布,晶粒取向,織構(gòu)的演變規(guī)律。研究結(jié)果表明:1、在高純鋁箔軋制過程中不附加中間退火,經(jīng)180℃/h隨爐升溫和到溫入爐兩種方式加熱到500℃進(jìn)行成品退火的高純鋁箔均發(fā)生了完全再結(jié)晶,{001}100立方取向的晶粒優(yōu)先形核并生長,{001}100立方織構(gòu)是主要的織構(gòu)組分;2、利用到溫入爐加熱方式進(jìn)行成品退火的高純鋁箔產(chǎn)生了再結(jié)晶晶粒的異常長大現(xiàn)象,而隨爐升溫進(jìn)行退火的材料中晶粒尺寸比較細(xì)小且組織均勻性好;3、在高純鋁箔的軋制過程中,分別采用175℃和190℃進(jìn)行中間退火2h,在相同的成品退火工藝條件下,175℃的中間退火的材料組織更加均勻,且立方織構(gòu)含量高;4、在相同的軋制和中間退火工藝條件下,隨著成品退火加熱速度的提高,高純鋁箔的再結(jié)晶晶粒尺寸逐漸減小,但是立方織構(gòu)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，

本文編號：1585552