7075铝合金板带淬火模拟研究  

Research on quenching simulation of 7075 aluminum alloy plate and strip

作　　者：朱瑶 李勇[1,2] 李家栋 杨文泰[1] 王昭东 Zhu Yao;Li Yong;Li Jiadong;Yang Wentai;Wang Zhaodong(State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China;Guangxi Advanced Aluminum Processing Innovation Center Co.,Ltd.,Nanning 530007,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]广西先进铝加工创新中心有限责任公司,广西南宁530007

出　　处：《轻金属》2022年第5期40-46,共7页Light Metals

基　　金：山东省重点研发计划项目(2019JZZY010401);南宁市科技重大专项项目(20191002);南宁市科技重大专项项目(20201041)。

摘　　要：为了对铝合金中厚板淬火过程的温度进行预测和控制,通过数值模拟研究缝隙喷嘴的缝隙厚度以及冷却水的射流角度变化对铝板温度场以及换热系数的影响。使用ANSYS软件建立了7075铝合金中厚板淬火过程的简化二维几何模型,用fluent模拟获得铝板上表面水流压力、水平水流速度、对流换热系数以及铝板心部淬火敏感区间平均冷却速度等变化规律,结果表明:同一流量情况下,缝隙喷嘴射流角度增大,铝板上表面冷却水压力峰值增大;缝隙厚度增大,铝板上表面冷却水压力峰值减小,对流换热系数减小,铝板心部淬火敏感区间的均冷速率在减小。射流角度为30°,缝隙厚度为1 mm时,铝板心部淬火敏感温度区间的平均冷却速率最大,为87.36℃/s。射流角度为15°,缝隙厚度为2.5 mm时,铝板心部淬火敏感区间的均冷速率最小,达到65.91℃/s。In order to predict and control the temperature of medium-thickness aluminum alloy plate during quenching process, the influence of the slot thickness of nozzle and the change of cooling water jet angle on the temperature field and heat transfer coefficient of aluminum plate was studied by numerical simulation. ANSYS software was used to establish a simplified two-dimensional geometric model of the quenching process of 7075 aluminum alloy plate, and the fluent was used to simulate and obtain the changing rules of water flow pressure on the upper surface of aluminum plate, horizontal water flow velocity, convective heat transfer coefficient and average cooling rate of the quenching sensitive region at the core of the aluminum plate. The results show that at the same flow rate, the peak value of cooling water pressure on the upper surface of aluminum plate increases as the jet angle of slot nozzle increases. With the increase of slot thickness, the peak value of cooling water pressure on the upper surface of aluminum plate decreases, the convective heat transfer coefficient decreases, and the average cooling rate of the quenching sensitive region at the core of the aluminum plate decreases. When the jet angle is 30° and the slot thickness is 1 mm, the average cooling rate of the quenching sensitive temperature region at the core of the aluminum plate is the largest, 87.36℃/s;when the jet angle is 15° and the slot thickness is 2.5 mm, the average cooling rate of the quenching sensitive region at the core of the aluminum plate is the smallest, 65.91℃/s.

关 键 词：7075铝合金 ANSYS 温度场 表面换热系数 

分 类 号：TG156.3[金属学及工艺—热处理]