2519铝合金管材热挤压过程的数值模拟
Numerical Simulation of Hot Extrusion Process of 2519 Aluminum Alloy Tubes
摘 要
在获得不同变形温度和应变速率下2519铝合金的压缩真应力-应变曲线的基础上,采用DEFORM-2D软件对2519铝合金管材的热挤压成形过程进行了数值模拟,获得了在挤压不同阶段中变形材料的应力、应变和温度场的分布及挤压力的变化规律.结果表明：挤压力模拟值与经验公式计算值相差约10%,模拟结果与计算结果较接近;生产中应严格控制该合金的挤压速率(<5 mm·s-1),以防止产生过烧现象.
数值模拟
2519铝合金
管材
hot extrusion process
numerical simulation
2519 alloy
tube
Abstract
On the basis of obtained true flow stress-true strain curves of 2519 aluminum alloy at different temperatures and strain rates,the hot extrusion processes of 2519 aluminum alloy tubes were simulated by using DEFORM 2D software.Stress field,strain field,temperature field and variation laws of the extrusion load for this material were obtained at different stages in the extrusion process.The results showe that the relative deviation between the simulated value of extrusion load and the calculated value from empirical formula is about 10%,so simulation result is close to the calculated result.The extrusion velocity must be strictly controlled to prevent overheating structure.
中图分类号 TG379
所属栏目
基金项目 湖南省教育厅资助项目(05C087)
收稿日期 2007/2/8
修改稿日期 2007/5/21
网络出版日期
作者单位点击查看
备注林启权(1965-),男,湖南浏阳人,教授,博士.
引用该论文: LIN Qi-quan,LI Ying-ming,WANG Zhen-qiu. Numerical Simulation of Hot Extrusion Process of 2519 Aluminum Alloy Tubes[J]. Materials for mechancial engineering, 2007, 31(12): 79～82
林启权,李应明,王振球. 2519铝合金管材热挤压过程的数值模拟[J]. 机械工程材料, 2007, 31(12): 79～82
被引情况:
【1】王冠,何芯,李落星,姚再起, "6063铝合金挤压型材尺寸超差分析及模具优化设计",机械工程材料 37, 85-89(2013)
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参考文献
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【2】Kramer L S,Blair T P,Blough S D.Stress-corrosion cracking susceptibility of various product forms of aluminum alloy 2519[J].Journal of Materials Engineering and Performance,2002,11(6):645-650.
【3】Devicent S M,Devletian J H,Gedon S A.Weld properties of the newlydeveloped 2519-T87 aluminum armor alloy[J].Welding Journal,1988,67(7):33- 43.
【4】李慧中,张新明,陈明安,等.2519铝合金焊接接头的组织与性能[J].中国有色金属学报,2004,14(6):956-960.
【5】刘建生,陈慧琴,郭晓霞.金属塑性加工有限元模拟技术与应用[M].北京:冶金工业出版社,2003.
【6】林启权,张 辉,彭大暑,等.2519铝合金热压缩变形流变应力行为[J].热加工工艺,2002(3):3-5.
【7】田荣璋,王祝堂.铝合金及其加工手册[M].长沙:中南大学出版社,2000.
【8】谢建新,刘静安.金属挤压理论与技术[M].北京:冶金工业出版社,2001.
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