共查询到18条相似文献,搜索用时 218 毫秒
1.
预变形及退火对高纯铝箔立方织构的影响 总被引:2,自引:0,他引:2
应用TEM和晶体取向分布函数方法研究和分析了预变形和退火工艺对高纯铝箔立方织构的影响。研究结果表明 ,预变形及退火主要通过影响晶体内的储存能大小 ,来影响Fe、Si的析出过程 ,影响成品箔材中立方织构 { 10 0 }〈0 0 1〉取向密度的大小。由于成品退火前Fe、Si能充分固溶在铝基体中 ,成品低温退火阶段可促使Fe、Si析出 ,增加立方取向晶粒的形核率 ,使成品在高温退火阶段晶粒沿立方取向择优长大 ,大大增加了高纯铝箔中立方织构的比例 相似文献
2.
3.
采用晶体取向分布函数(ODF),极图和TEM分析了高纯铝箔在不同的分级退火工艺过程中再结晶结构的演变,研究结果表明:高纯铝的变形结构主要由S取向组成,另含有少量的Cu织构和Bs织构,2级退火箔材中立方织构含量高于3级退火的;其中在200度低温退火时在亚晶界形成立方核心,并沿亚晶界析出含铁化合物,520℃高温退火后立方织构取向密度最大,R织构含量最少,在250℃低温退火时,形成复大角亚晶界,铁固溶在铝基体中,520℃高温退火后铁在晶内析出,立方织构减少,R取向增强。 相似文献
4.
5.
以高纯铝箔和不同Ce含量的稀土铝箔为研究对象,运用EBSD技术对高纯铝箔与稀土铝箔冷轧后及不同温度再结晶退火后的织构进行分析,研究再结晶退火过程中织构的演变规律和稀土Ce对铝箔织构的影响。结果表明:轧制总变形率为96%的铝箔,织构以铜型织构、R型织构和一些S织构为主。随最终退火温度的升高,立方织构占有率快速增长。少量稀土元素的加入有利于再结晶退火后立方织构的形成。 相似文献
6.
采用晶体取向分布函数方法(ODF)研究和分析了在高压阳极电容铝箔加入微量铍(Be)对形变织构和再结晶织构形成的影响。结果表明:在高纯铝中添加微量铍,变形组织组分的强弱发生变化,随铍含量的增加,S织构和C织构组分减弱,B5织构的铍含量为0.0020%时取向密度最小。成品退火时,添加0.0020%铍,再结晶立方织构最强,R取向较弱;在其它情况下,立方织构均减少,R织构增加。由于铍能与铁等微量杂质元素形成化合物,析出后可净化基体,降低基体中杂质铁的浓度,减少铁对位错和空位运动的阻力,从而影响变形组织的组成和降低高纯铝再结晶温度,促进再结晶立方取向核心的形成与长大。 相似文献
7.
Fe杂质对高纯铝箔再结晶织构及比电容的影响 总被引:27,自引:4,他引:23
对不同杂质含量的高纯铝锭按特定生产工艺得到高压阳极软态光箔和腐蚀箔。采用X射线衍射法测得板面晶面衍射强度,蚀坑法显示晶粒取向形貌,采用极图、取向分布函数(ODF)研究晶粒取向及其分布情况。研究了铝箔再结晶织构随Fe等杂质含量的变化,分析了Fe杂质元素对铝箔再结晶行为的影响。借助扫描电镜观察箔材腐蚀坑形貌,并分析沿不均匀的亮区、暗区成分的分布。研究结果表明:铝箔的再结晶织构主要由立方织构{100}〈001〉及R织构{124}〈211〉构成,两者的相对强弱随Fe等杂质含量有规律地变化。铝箔的比电容随立方织构的增加而增加。铝箔的再结晶行为及腐蚀性能受Fe等杂质含量与分布的控制。这些研究结果为探索高压阳极电容铝箔的最佳Fe等杂质含量范围、制定最佳生产工艺,获得高比例的立方织构(>88%)和高比电容(>1.0μF/cm2,375V)提供了理论依据和实验资料 相似文献
8.
9.
冷轧低压电子铝箔退火加热过程中的再结晶和晶粒长大 总被引:3,自引:3,他引:3
采用EBSD微取向分析、织构定量分析、晶粒尺寸分析等手段研究了低压电子铝箔不同退火加热过程对再结晶和晶粒长大行为的影响,并利用再结晶理论对相关过程进行了讨论.初次再结晶前的回复处理会明显降低冷轧铝箔的储存能及再结晶驱动力,并对再结晶晶粒尺寸和立方织构量产生规律性影响.特定的退火加热过程会诱发电子铝箔的晶粒异常长大,并导致立方织构量的明显下降. 相似文献
10.
电场作用下高纯铝箔再结晶织构 总被引:5,自引:2,他引:3
采用电场和常规退火以及织构分析(ODF分析)技术,对高纯铝箔再结晶织构的形成及演变规律进行了研究,结果表明电场作为一种重要的势能对金属的微观结构具有一定的影响。电场退火可以显著地降低高纯铝箔的再结晶温度,平均降低了50-70℃,扩大了形成强立方织构的再结晶温度范围,提高了再结晶立方织构的强度,但未改变其再结晶织构的形成机制及演变规律。 相似文献
11.
1 INTRODUCTIONThecubetextureisimportanttohighpurityalu minumfoilsforhighvoltagecapacitorsbecauseitcanenlargeeffectivesurfaceofaluminumfoilsandin creasecapacitancethroughchanneletching .Inordertoincreasethevolumefractionofthecubecompo nent ,a greatdealofresearchesontheformationmechanismofcubetexturehavebeendone ,andmanymethodswere proposed ,suchasimpuritycontrol ling[1,2 ] ,directionalsolidification[3] ,preheating[4 ] ,inhomogeneousrolling[5] ,vacuumannealing[6 ] andsoon .Inthispaperamulti… 相似文献
12.
13.
The cube texture and the surface corrosion structure of aluminum anode foil for high voltage electrolytic capacitor containing trace Sn were investigated based on quantitative texture analysis and microstructure observation under SEM. High volume fraction of cube texture over 95% and obviously higher specific capacity are obtained in the foils with less than 0.002% Sn. It is indicated that the corrosion behavior of trace Sn on aluminum surface is similar with that of Pb. Higher content of Sn over 0.002% reduces the cube texture component and therefore the specific capacity. Sn, as an eco-ffiendly microelement, can be applied to replace Pb in improving the homogenous pitting behaviors of high voltage aluminum foils. 相似文献
14.
高纯铝箔在异步轧制和再结晶过程中取向的演变 总被引:7,自引:0,他引:7
采用不同速比的异步轧制技术对99.99%的高纯铝板进行不同形变量的冷轧,并对冷轧样品进行不同温度和时间的再结晶退火.利用X射线衍射技术和TEM观测探讨了异步轧制条件下高纯铝箔中变形织构和再结晶织构的演变.结果表明:高速比的异步轧制(i=1.28)在样品中产生相对较强的旋转立方织构{001}(110).异步轧制后退火的高纯铝箔样品中,立方{001}(100)织构组分的再结晶晶核的形成和长大存在一个临界转变温度,此温度与异步轧制的速比成反比.异步轧制有利于降低高纯铝箔的再结晶温度,这与异步轧制提高高纯铝箔的形变储能有关.异步轧制有利于在低温时形成强的立方{001}(100)织构组分,但此时漫散较大;随着退火温度的升高,漫散范围明显缩至8°-10°. 相似文献
15.
The influences of aluminum cube texture on etched foil qualities and current efficiency were studied in this paper. The present results indicated that the decrease of cube texture (volume fraction) would lead to the decrease of tunnel densities on etched foils. Current efficiency changed little with cube texture and could reach up to 98%. The same current efficiency led to the same electrochemical corrosion weight loss, which caused the etched foils with a smaller tunnel density had a larger tunnel size. The same electrochemical corrosion weight loss would also lead to the etched foils produced by different cube texture foil have the same folding endurance. The etched foil produced by the foil with a better cube texture would have a larger tunnel density, which caused the capacitance of it was larger. 相似文献
16.
17.
Chunbo Cai Zesheng Ji Huajun Zhang 《Journal of Materials Engineering and Performance》2010,19(5):627-632
To improve the surface morphology, formability, and deep drawing properties of 1050 aluminum alloy sheets, laser-textured
rolls were used in cold rolling process. Effects of laser-textured rolls, comparing with conventional ones, on microstructure
and texture of aluminum alloys after rolling and following recrystallization were studied. In aluminum sheets processed by
laser-textured rolls and conventional rolls, microstructure and texture were similar after rolling, but significantly different
after recrystallization. Laser texturing process results in finer and inhomogeneous recrystallized grains. The recrystallization
texture of the specimen rolled with conventional roll has a major cube component and a minor R component. The intensity of
cube component increases with increasing annealing temperature. However, recrystallization texture of the specimen rolled
with laser-textured roller is much more random. The specimen shows that recrystallization texture has only a weak cube orientation
but strong rotated-cube orientation as well as a much higher fraction of random orientation. 相似文献