铝合金挤压型材淬火模拟研究及工艺参数的改进  

Simulation Study of the Quenching Process and Parameter Improvement of Aluminum Extrusion

作　　者：李落星[1] 胡理中[1] 刘志文[1] 姚再起[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]杭州吉利汽车研究院有限公司,浙江杭州311228

出　　处：《湖南大学学报（自然科学版）》2013年第2期71-76,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51075132);国家十二五科技支撑计划项目(2011BAG03B02);湖南大学汽车车身先进设计与制造国家重点实验室自主课题资助项目(61075005)

摘　　要：为了解决'U'形铝合金型材在喷水淬火过程中因冷却速度不均匀而导致型材截面变形的问题,基于FLUENT和ANSYS-WORKBENCH软件平台,建立了'U'形挤压型材在喷水冷却过程的有限元模型.分析了3种不同喷嘴速度大小方案下型材淬火冷却过程的温度场、残余应力和变形等变化规律.结果表明:经工艺参数优化后,型材截面上不同部位喷嘴速度大小设计更合理,淬火冷却过程中型材的温度场和等效应力分布更均匀,最大等效应力最小,型材的变形最小.通过有限元分析能较好地改进型材淬火冷却过程中喷嘴速度大小及分布,为实际挤压生产过程提供指导.In order to address distortion caused by cooling speed for aluminum profile in water spray quenching processing, a finite element model for cooling process in water spray of the extruded aluminum profile was developed on the basis of the FLUENT and ANSYSWORKBENCH software platform. The temperature field, the residual stress and the strain of cross section in quenching processing were analyzed under three runs with different water spray speeds. After process parameters were optimizated, the results showed that the nozzle size speed of the section profiles in different parts was more reasonable, and the distribution of temperature and equivalent stress was more uniform. It presented the smallest equivalent stress and strain of cross section. Finite element analysis can help improve nozzle distribution and spray velocity in the quenching process of the aluminum profile, which can provide guidance for practical production in industry.

关 键 词：挤压铝型材 淬火 喷嘴速度 温度场 数值模拟 

分 类 号：TG166.3[金属学及工艺—热处理]