Al-4.1Cu-1.4Mg合金均匀化退火工艺研究  

Research on homogenizing annealing process of Al-4.1Cu-1.4Mg alloy

作　　者：谭艺哲 陈雷[1] 左德运[1] 李德贵[1] 杜晓轩 彭来 TAN Yizhe;CHEN Lei;ZUO Deyun;LI Degui;DU Xiaoxuan;PENG Lai(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2024年第7期33-37,共5页Light Alloy Fabrication Technology

摘　　要：半连续水冷铸造的Al-4.1Cu-1.4Mg合金出现枝晶偏析。采用光学显微镜、扫描电镜、差热分析等手段研究工业化生产条件下合适的均匀化退火制度。研究结果表明:适宜于工业化生产的均匀化退火制度为(490±5)℃20 h。按该制度均匀化退火后Al-4.1Cu-1.4Mg合金枝晶偏析消除,弥散相分布也趋于均匀,铸造应力下降,加工性能良好。Al-4.1Cu-1.4Mg alloy prepared by semi-continuous water-cooled casting has dendritic segregation and grain boundary segregation.The suitable homogenizing annealing system under industrial production conditions was studied by means of optical microscope,scanning electron microscope and differential thermal analysis.The results show that the ho-mogenizing annealing system suitable for industrial production is(490±5)℃20h.After homogenizing annealing based on this system,the dendritic segregation of Al-4.1Cu-1.4Mg alloy is eliminated,the distribution of dispersed phase tends to be uniform,the casting stress decreases,and the processing performance is good.

关 键 词：Al-4.1Cu-1.4Mg合金 结晶组织 铸造应力 偏析 均匀化退火工艺 

分 类 号：TG166.3[金属学及工艺—热处理]