预拉伸对2A12合金板材粗晶的影响  

Effect of pre-stretching on coarse grain of 2A12 alloy sheet

作　　者：李霜 温庆红 冯旺 程思梦 林顺岩 Li Shuang;Wen Qinghong;Feng Wang;Cheng Simeng;Lin Shunyan(Southwest Aluminum(Group)Co.,Ltd.,Chongqing 401326,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326

出　　处：《铝加工》2021年第2期47-49,共3页Aluminium Fabrication

摘　　要：针对2A12合金板材在化铣面后出现的粗大晶粒问题进行了宏观形貌、显微组织及偏光组织分析。结果表明,2A12样品化铣面的粗大晶粒是由预拉伸时变形量偏大所致。拉伸量小于4%时,基材晶粒度1级;拉伸量为5%时,基材晶粒开始长大;拉伸量大于5%时,基材晶粒明显粗大。The macroscopic morphology,microstructure and polarized structure of 2A12 alloy sheet were analyzeds.The results show that the coarse grains of the milling face of 2A12 sample are caused by the larger deformation during pre-stretching.When the stretch⁃ing amount is less than 4%,the substrate grain size is grade;when the stretching amount is 5%,the substrate crystal grains begin to grow;when the stretching amount is greater than 5%,the substrate crystal grains are obviously coarse.

关 键 词：2A12合金 板材 预拉伸 粗晶 

分 类 号：TG339[金属学及工艺—金属压力加工]