热轧与冷轧对3104铝合金微观组织演变和亚结构的影响  

Effect of hot rolling and cold rolling on microstructure evolution and substructure of 3104 aluminum alloy

作　　者：李大林[1,2] 朱鹏程[1] 张子豪 王鹏飞 尹欣 LI Da-lin;ZHU Peng-cheng;ZHANG Zi-hao;WANG Peng-fei;YIN Xin(School of Materials Science and Engineering,Yantai Nanshan University,Yantai 265713,China;Light Alloy Processing Laboratory of Shandong Province High Education,Yantai Nanshan University,Yantai 265700,China;Hangxin Material Technology Co.,Ltd.,Yantai 265713,China)

机构地区：[1]烟台南山学院材料科学与工程学院,山东烟台265713 [2]烟台南山学院山东省高校轻合金加工成形实验室,山东烟台265700 [3]航鑫材料科技有限公司,山东烟台265713

出　　处：《塑性工程学报》2022年第11期233-239,共7页Journal of Plasticity Engineering

基　　金：山东省“十三五”高等学校重点实验室建设项目。

摘　　要：对热轧和冷轧过程中3104铝合金边部、1/4处和心部的微观结构变化规律进行了研究,运用差热、透射电镜、X射线衍射和电子背散射衍射技术对微观组织结构和构成进行了系统表征。结果表明,3104铝合金热轧后的基体组织中仍存在部分尺度较大的共晶结晶相,弥散相的析出存在于均热和热轧过程中。热轧后,相比于心部和1/4处,边部的基体组织中存在更多的位错,并且有大量亚晶生成;边部、心部和1/4处晶粒尺寸大小分布不均匀,心部的晶粒尺寸为10~200μm,平均晶粒尺寸为51.15μm;边部和1/4处的晶粒尺寸范围为10~80μm,平均晶粒尺寸分别为22和25μm。冷轧过程中,三机架的位错密度较单机架高,存在的胞状亚晶尺寸和亚晶尺寸偏小。The microstructure change in the edge,1/4 position and center of 3104 aluminum alloy during hot rolling and cold rolling were studied.The structure and composition of microstructure were characterized systematacially using differential scanning calorimetry(DSC),transmission electron microscope(TEM),X-ray diffraction(XRD)and electron back-scattered diffraction(EBSD).The results show that there are still some large-scale eutectic crystalline phases in the matrix structure of 3104 aluminum alloy after hot rolling,and the precipitation of dispersed phase exists in soaking and hot rolling processes.After hot rolling,compared with the center and 1/4 position,there are more dislocations in the matrix structure at the edge,and a large number of subgrains are formed.The grain size distribution at the edge,center and 1/4 position is uneven.The grain size at the center is 10-200μm and the average grain size is 51.15μm.The grain size at the edge and 1/4 position is 10-80μm,and the average grain size is 22 and 25μm,respectively.In the cold rolling process,the dislocation density of three stands is higher than that of single stand,and the sizes of cellular subgrain and subgrain are smaller.

关 键 词：铝合金 热轧 冷轧 微观组织 晶粒尺寸 

分 类 号：TG335.5[金属学及工艺—金属压力加工]