锻压技术

镁合金及纯铝连续挤压流动均匀性对比研究

英文标题：Contrast research of continuous extrusion flow uniformity between magnesium alloy and pure aluminum

作者：万萌萌王延辉杨俊英宋宝韫

分类号：TG379

出版年,卷(期):页码：2013,38(4):135-139

摘要：

根据连续挤压扩展成形的特点，基于Deform-3D软件建立镁合金及纯铝的刚塑性有限元模型，进行连续挤压过程的数值模拟，分析挤压轮转速、产品宽度和金属流动通道长度对两种材料流动均匀性的影响程度。模拟结果表明：随着挤压轮转速的提高和产品宽度的增大，镁合金及纯铝在模具定径带处的流速均方差均增大，两种材料的增大速率相近，并且镁合金的流速均方差均大于纯铝的；在板材连续挤压扩展成形中，流动通道长度的改变导致纯铝在模具定径带处的流速均方差的变化幅度比镁合金大。

Based on the characteristic of the continuous extrusion extending forming, the model of rigid-plastic FEM used Deform-3D was established and the numerical simulation of continuous extrusion forming processes (Conform) of the magnesium alloy and pure aluminum were carried out. The effects of the extrusion wheel velocity, product width and channel length of metal flow on the flow uniformity of the two materials were analyzed. Simulation results show that the mean-square deviation of velocity of the magnesium alloy and pure aluminum in the position of the die bearing becomes larger with the increase of extrusion wheel velocity and product width. The increasing rates of the two materials are similar, and the mean-square deviation of velocity of magnesium alloy is greater than that of pure aluminum. During the continuous extrusion extending forming, the variational amplitude of the mean-square deviation of velocity for pure aluminum is larger than that for magnesium alloy because of the change of the flow channel length.

基金项目：

国家科技支撑计划项目（2011BAE23B01）

万萌萌(1988-)，女，硕士研究生

参考文献：

［1］刘长瑞, 王伯健, 王庆娟, 等. 镁合金AZ31常温下的塑性变形行为[J]. 轻合金加工技术, 2005, 33 (3): 43-46. Liu C R, Wang B J, Wang Q J, et al. Plastic deformation behaviour of AZ31 magnesium alloy at room temperature [J]. Light Alloy Fabrication Technology, 2005, 33 (3): 43-46.
［2］杨坤, 刘春萍, 方君健. 铝杆连铸连轧生产线熔炼单元的改进措施[J]. 铝加工, 2011, (4): 43-52. Yang K, Liu C P, Fang J J. Improvement measures for melting & casting unit of continuous casting and rolling line for aluminum rods [J]. Aluminium Fabrication, 2011, (4): 43-52.
［3］唐宁. 连续铸轧AZ31B镁合金板坯的组织结构及退火行为[D]. 长沙: 中南大学, 2008. Tang N. Microstructure and Anneal Behaviour of Twin-roll casting AZ31B Magnesium Alloy Sheets [D]. Changsha: Central South University, 2008.
［4］潘军朋. 铸轧铝板坯晶粒度的控制[J]. 轻合金加工技术, 2003, 31 (7): 10-12. Pan J P. Control of the crystal grain size in twin-roll cast-rolling aluminium stocks [J]. Light Alloy Fabrication Technology, 2003, 31 (7): 10-12.
［5］宋宝韫, 樊志新, 陈吉光, 等. 铜、铝连续挤压技术特点及工业应用[J]. 稀有金属, 2004, 28 (1): 257-261. Song B Y, Fan Z X, Chen J G, et al. Features of copper and aluminum continuous extrusion process and industrial application [J]. Chinese Journal of Rare Metals, 2004, 28 (1): 257-261.
［6］刘元文, 宋宝韫. 铜扁线连续挤压技术[J]. 锻压技术, 2004, 28(4): 49-50. Liu Y W, Song B Y. Technology of continuous extrusion for rectangular copper wire [J]. Forging & Stamping Technology, 2004,28 (4): 49-50.
［7］运新兵, 姚明亮, 赵颖，等. 阻流环及模具结构对大扩展比连续挤压成形的影响[J]. 塑性工程学报, 2011, 18(4): 1-5. Yun X B, Yao M L,Zhao Y， et al. Effect of the preventing mould and die structure on continuous extrusion deforming under large expansion ratio[J]. Journal of Plasticity Engineering, 2011, 18 (4): 1-5.
［8］赵颖, 运新兵, 李冰, 等. 连续挤压与正挤压在扩展成形中的对比分析[J]. 锻压技术, 2009, 34 (4): 163-167. Zhao Y, Yun X B, Li B, et al. Contrast analysis of extending forming between continuous extrusion and forward extrusion [J]. Forging & Stamping Technology, 2009, 34 (4): 163-167.
［9］郭强, 张辉, 陈振华, 等. AZ31镁合金的高温热压缩流变应力行为的研究[J]. 湘潭大学自然科学学报, 2004, 26 (3): 108-111. Guo Q, Zhang H, Chen Z H, et al. Flow stress behavior of AZ31 magnesium alloy during hot compression deformation at elevated temperature [J]. Natural Science Journal of Xiangtan University, 2004, 26 (3): 108-111.
［10］Li L, Zhang H, Zhou J, et al. Numerical and experimental study on the extrusion through a porthole die to produce a hollow magnesium profile with longitudinal weld seams [J]. Materials and Design, 2008,（29）:1190-1198.
［11］程磊, 谢水生, 黄国杰, 等. 焊合室高度对分流组合模挤压成形过程的影响[J]. 稀有金属, 2008, 32 (4): 442-446. Chen L, Xie S S, Huang G J, et al. Effects of height of welding chamber heights on extrusion forming process of porthole die [J]. Chinese Journal of Rare Metals, 2008, 32 (4): 442-446.

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