全等轴晶高镁5XXX系铝合金热变形行为及热加工图研究  

Study on Hot Deformation Behavior and Hot Working Diagram of Fully Equiaxed High-Mg 5XXX Aluminum Alloy

作　　者：王经涛 孙宁 孙有政 王永红 曾凡清 杜敏 王成见 张佼[3] 韩延峰[3] 麻芳 WANG Jingtao;SUN Ning;SUN Youzheng;WANG Yonghong;ZENG Fanqing;DU Min;WANG Chengjian;ZHANG Jiao;HAN Yanfeng;MA Fang(National Engineering Research Center for Plastic Working of Aluminium Alloys,Shandong Nanshan Aluminium Co.,Ltd.,Longkou 265713,China;Shandong Aluminum Alloy Pressure Processing Technology Innovation Center,Shandong Nanshan Academy of Science and Technology Co.,Ltd.,Longkou 265713,China;School of Materials Science and Engineering,Shanghai JiaoTong University,Shanghai 200240,China;College of Chemical Engineering and Technology,Yantai Nanshan University,Longkou 265713,China)

机构地区：[1]山东南山铝业有限公司国家铝合金压力加工工程技术研究中心,山东龙口265713 [2]山东南山科学技术研究院有限公司,山东省铝合金压力加工技术创新中心,山东龙口265713 [3]上海交通大学材料科学与工程学院,上海200240 [4]烟台南山学院化学工程与技术学院,山东龙口265713

出　　处：《热加工工艺》2025年第4期112-117,共6页Hot Working Technology

基　　金：国家重点研发计划项目(2020YFB0311200)。

摘　　要：采用Gleeble-3500热模拟试验机对喷射成型制备的全等轴晶高镁5XXX系铝合金进行等温热压缩试验,研究了全等轴晶高镁5XXX系铝合金在变形温度350~500℃、应变速率0.01~10 s^(-1)条件下的热变形行为。同时,基于Arrhenius双曲正弦本构模型、动态材料模型及Prasad理论建立了全等轴晶高镁5XXX系铝合金的本构方程以及热加工图。结果表明,喷射成型全等轴晶技术制备的高镁5XXX系铝合金与传统半连续铸造铝合金的热变形行为基本相似,但存在比传统铸造合金更大区域的加工失稳区,并通过计算获得试验合金的热压缩变形激活能为201.548120 kJ/mol,最佳热加工工艺参数为457~477℃、0.175~1.872 s^(-1)。The Gleeble-3500 thermal simulation testing machine was used to conduct isothermal compression tests of fully equiaxed high magnesium 5XXX aluminum alloy prepared by spray forming.The thermal deformation behavior of fully equiaxed high magnesium 5XXX aluminum alloy was studied under deformation temperature of 350-500℃and strain rate of 0.01-10 s^(-1).Meanwhile,based on the Arrhenius hyperbolic sine constitutive model,dynamic material model and Prasad theory,the constitutive equation and hot processing map of fully equiaxed high magnesium 5XXX aluminum alloy were established.The results show that the hot deformation behavior of the high magnesium 5XXX series aluminum alloy prepared by spray forming full equiaxed technology is basically similar to that of the traditional semi-continuous casting aluminum alloy,but there is a processing instability zone with a larger area than that of the traditional casting alloy.Through calculation,the hot compression deformation activation energy of the test alloy is 201.548120 kJ/mol,and the optimal hot working process parameters should be 457-477℃,0.175-1.872 s^(-1).

关 键 词：等轴晶 高镁铝合金 热变形 热加工图 

分 类 号：TG146.21[一般工业技术—材料科学与工程]