锻压技术

6005A复杂截面铝合金车体型材挤压过程数值模拟与组织性能研究

英文标题：Study on numerical simulation, microstructure and properties of aluminum alloy 6005A car body profile with complex section in extrusion process

作者：张国家王越刘正王峰毛萍莉王志周野

单位：沈阳工业大学

关键词：铝合金型材挤压复杂截面组织性能数值模拟

分类号：TG146.2

出版年,卷(期):页码：2018,43(2):0-0

摘要：

以复杂截面的6005A铝合金车体挤压型材为研究对象，利用Hyperxtrude有限元软件对挤压过程进行模拟，分析了挤压变形过程中的温度场、速度场及形变场分布。在75 MN挤压机上对铝合金型材进行挤压成形，采用光学显微镜（OM）、扫描电镜（SEM）观察和硬度实验，研究了挤压过程中铝合金型材的组织及性能的变化，并与模拟结果进行了对比。结果表明：由于挤压型材尺寸比较复杂，同一截面上温度、速度和变形量的分布差别较大，对应温度高、速度快及形变量大的部位，其组织细小且第二相数量较多，硬度高；由于型材挤压过程中会产生明显的热效应，导致型材尾部的温度高于型材头部的温度，且型材尾部组织更加均匀，第二相分布更弥散，硬度值更高。

For aluminum alloy 6005A car body extrusion profile with complex section，the extrusion process was simulated by Hyperxtrude software, and the distributions of temperature field, velocity field and deformation field during the extrusion process were analyzed. Then, the aluminum alloy profile was extruded in the extruding machine of 75 MN, and the microstructures and mechanical properties of aluminum alloy profile were investigated by optical microscopy（OM）, scanning electron microscopy（SEM）and hardness test. Furthermore, the microstructures and properties of aluminum alloy profiles during extrusion process were studied, and the simulation results were compared. The results show that for the complex section dimension of extrusion profile, the distributions of temperature, velocity and deformation in the same section are quite different. Corresponding to the position with higher temperature, faster velocity and large deformation, the finer grain with more second phase and higher hardness were obtained. Due to the significant thermal effect during the extrusion process, the temperature of profile tail is higher than that of the profile head, resulting in a more uniform microstructure, more dispersing second phase and higher hardness of aluminum alloy profile tail.

基金项目：

沈阳市科技计划项目(17-11-8-00)

作者简介：张国家（1992-），男，硕士研究生 E-mail：1393337558@qq.com 通讯作者：王越（1961-），女，硕士，副教授 E-mail：zliu4321@126.com

参考文献：

［1］郑晖,赵曦雅.汽车轻量化及铝合金在现代汽车生产中的应用
［J］.锻压技术,2016,41(2):1-5.

Zheng H,Zhao X Y. Lightweight automobile and application of aluminum alloys in modern automobile production
［J］. Forging & Stamping Technology,2016,41(2): 1-5.

［2］徐宁,黄东男,李有来,等. 复杂断面空心型材的双级分流模挤压过程模拟分析
［J］.锻压技术,2016,41(12):62-66.

Xu N,Huang D N,Li Y L,et al. Simulation analysis on two-stage porthole dies extrusion for complicated hollow section profile
［J］.Forging & Stamping Technology, 2016,41(12):62-66.

［3］李利,侯文荣,张志豪,等. 断面复杂程度对铝合金挤压实心型材出模孔温度的影响
［J］.塑性工程学报,2015,22(2):12-17.

Li L,Hou W R,Zhang Z H,et al.Effect of cross-section complexity on the extrusion exit temperature of aluminum solid profile
［J］. Journal of Plasticity Engineering,2015,22(2):12-17.

［4］刘静安.铝及铝加工行业发展新动态与技术创新、产品开发新趋向
［J］.四川有色金属,2000,(4):1-7.

Liu J A.Aluminum and aluminum processing industry to develop new developments and technological innovation,product development trends
［J］. Sichuan Nonferrous Metals,2000,(4):1-7.

［5］萧今声.中国铝工业发展现状与前景预测
［J］.有色金属再生与利用,2004,(1):1-2.

Xiao J S. The prospect prediction and the current situation of development of aluminum industry
［J］. Nonferrous Metal Recycling and Utilization,2004,(1):1-2.

［6］纵荣荣,郝秋红,韩志君,等.轨道车辆用超宽幅薄壁铝型材挤压过程数值模拟及模具优化
［J］.塑性工程学报,2015,22(4):39-43.

Zong R R,Hao Q H,Han Z J,et al.Numerical simulation of extrusion and dieoptimization for super wide thin-walled aluminum profile for railway vehicles
［J］. Journal of Plasticity Engineering,2015,22(4):39-43.

［7］郭丽丽, 李永兵,张晓嵩,等.大尺寸ZK60镁合金型材挤压成形数值模拟及实验研究
［J］.塑性工程学报,2016,23(5):29-35.

Guo L L,Li Y B,Zhang X S,et al. Numerical simulation and experimental study on large size extruded profile of ZK60 magnesium alloy
［J］. Journal of Plasticity Engineering,2016,23(5):29-35.

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