3003-H14电池壳用铝合金板材晶粒粗大问题研究  

Research on Coarse Grain of 3003-H14 Aluminium Alloy Sheet for Battery Shell

作　　者：何峰 杨阳 邹立颖 HE Feng;YANG Yang;ZOU Liying(Chinalco Southwest Aluminum Sheet and Strip Co.,Ltd.,Chongqing 401326;Chinalco Materials Application Research Institute Co.,Ltd,Beijing 102209,China)

机构地区：[1]中铝西南铝板带有限公司,重庆401326 [2]中铝材料应用研究院有限公司,北京102209

出　　处：《铝加工》2024年第5期24-28,共5页Aluminium Fabrication

摘　　要：使用金相显微观察(OM),扫描电子显微观察(SEM),电子背散射衍射分析(EBSD)等手段,研究了3003-H14电池壳用铝合金板材生产过程中成品表面晶粒粗大导致表面质量不佳的问题。研究发现,粗晶现象主要发生在板材表面,粗晶层深度约为150μm,晶粒尺寸超过1 mm。相较于晶粒尺寸正常试样,晶粒粗大试样拥有更低的α-AlFeMnSi化合物占比,更多的亚微米尺度AlMnSi析出相,更大的化合物尺寸以及更不均匀的化合物尺寸分布规律。通过文献调研、调取生产流程的工艺信息以及小炉均匀化热处理试验的复现,分析认为,均匀化强度不足导致亚微米尺度的AlMnSi相析出过多,阻碍了再结晶形核,导致了晶粒的异常粗大。经过对均匀化热处理环节的把控与调整,粗晶问题得到解决。By means of optical micrograph(OM),scanning electron micrograph(SEM)and electron back scatter diffraction(EBSD),the coarse grain on the surface of 3003-H14 aluminium alloy sheet was studied.It is found that the coarse grain phenomenon mainly oc⁃curs on the surface of the sheet,the depth of the coarse grain layer is about 150μm,and the grain size is more than 1 mm.Compared with the normal grain size samples,the coarse grain samples have a lower proportion ofα-AlFeMnSi compounds,more submicron scale AlMnSi precipitates,larger compound size and more uneven compound size distribution.Through literature research,process in⁃formation review and the repetition of homogenization in small furnace,the analysis shows that insufficient homogenization strength leads to excessive precipitation of submicron scale AlMnSi phase,which hinders the nucleation of the recrystallization and leads to the coarse grain.After controlling and adjusting the homogenizing heat treatment process,the coarse grain problem was solved.

关 键 词：3003电池壳用铝板 均匀化热处理 再结晶 AlMnSi析出相 

分 类 号：TG146.21[一般工业技术—材料科学与工程]