1235铝合金在加工过程中析出相组织的演变  

Evolution of microstructure of the precipitated phase in 1235 aluminum alloy during processing

作　　者：李万印 陈亮维[1] 岳有成[2] 杨钢[2] Li Wanyin Chen Liangwei Yue Youcheng Yang Gang(Faculty of Materials and Engineering, Kunming University of Science and Technology, Kunming 650093, China Kunming Metallurgical Institute, Kunming 650224, China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明冶金研究院材料研究所,云南昆明650224

出　　处：《轻金属》2016年第12期47-51,共5页Light Metals

基　　金：国家863计划资助项目(2013AA030803);云南省应用基础研究重大资助项目(2013FC010)

摘　　要：利用透射电镜对1235铝合金在加工过程中析出相显微组织进行观察。结果表明，1235铝合金在铸轧中液态铝经急冷形成了大小为10～30nm的纳米晶区域，有的纳米晶区域被拉伸，铝有多种取向分布，并且有明显的滑移带，没有检测到Al与Fe、Si等晶粒细化剂形成的析出相，这说明它们极可能是以固溶体形式存在。在轧制过程中有Al3FeSi相析出，析出相沿轧制方向被拉伸，分别呈线状、散点状或棒状分布。经630℃7h的均匀化退火后形成的析出相是Al4Si，经380℃7h中间退火后形成的析出相是（lFe，Si），这些析出相都团聚成球状。The microstructures of the precipitated phase in 1235 aluminum alloy during processing were studied using transmission electron microscope （TEM）. The results show that 10 - 30nm nanocrystalline regions appear in 1235 aluminum alloy due to liquid aluminum by excessive quench during twin roll casting, some nanocrystalline regions are tensile, there are a variety of orientation distribution, and has obvious slip band in the alloy, the precipitated phases of Al with grain refiner element Fe and Si are not observed, it is very likely to form solid solution ; the precipitated phase of Al3 FeSi precipitates during the rolling process, stretching along the rolling direction, it is in linear, punctuate or rod distribution respectively; after homogenization annealing at a temperature of 630℃ for 7h, the precipitated phase Al4 Si is formed, and after intermediate annealing at a temperature of 380℃ for 7h, the precipita- ted phase（ A1, Fe, Si） is formed, there precipitated phases are reunited into a ball.

关 键 词：1235铝合金 析出相 显微组织 热处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]