金属学报  2007, Vol. 43 Issue (2): 199-204

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不同摩擦挤压过程中金属流动行为的变形分区研究

苑世剑 李峰 刘钢

哈尔滨工业大学材料科学与工程学院; 哈尔滨 150001

THE RESEACH ON METAL FLOW DURING EXTRUDING PROCESS UNDER DIFFERENT FRICTION CONDITIONS BY DEFORMING AREA DIVISIO

LI Feng

哈尔滨工业大学

苑世剑; 李峰; 刘钢 . 不同摩擦挤压过程中金属流动行为的变形分区研究[J]. 金属学报, 2007, 43(2): 199-204 .
, , . THE RESEACH ON METAL FLOW DURING EXTRUDING PROCESS UNDER DIFFERENT FRICTION CONDITIONS BY DEFORMING AREA DIVISIO[J]. Acta Metall Sin, 2007, 43(2): 199-204 .

摘要 参考文献 相关文章 Metrics 全文: PDF(329 KB)   摘要: 为了研究积极摩擦挤压过程中金属的变形流动行为，采用数值模拟和实验研究，深入分析了积极摩擦挤压过程中金属变形流动行为的力学机理。并利用应力偏张量第二不变量J2、罗德系数 等特征量对挤压过程进行了变形分区，结果表明：带积极摩擦挤压时筒底不出现分流的情形，“死区”缺陷完全消失，处于塑性区内材料的应变类型由三种变成为均一的拉伸类，且显著改善了成形过程中金属变形和流动的均匀性。因此，较利于金属的挤出成形及制品质量的提高。 Abstract：In order to investigate the metal flow behavior during extrusion process with active friction, numerical simulations and experiments were employed to investigate the mechanical mechanism of the extrusion process with active friction. The characteristic quantity such as the second invariant of the deviatoric stress tensor (J2)、Lode parameter( ) were employed for the division of deformation area. The results show that when extruding with active friction, no metal flow interface forms at the container bottom, the dead metal zone completely disappears, the deformation type of the metal in the plastic deformation area changes from three to the tension type, and the homogeneity of the deformation as well as metal flow is greatly improved. Therefore, it will be easy for extruding and promoting the extrudates quality. Key words： 收稿日期: 2006-06-05      ZTFLH:  TG376   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 苑世剑 李峰 刘钢 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2007/V43/I2/199 [1]Shan D B,Xu W C,Lu Y.J Mater Process Technol,2004;151:289 [2]Hsu T C,Huang C C.J Mater Process Technol,2003;140:49 [3]Tan X C.Int Tribol,2002;35:385 [4]Lin Z P,Hua J.J Nanchang Univ,1988;10(1):20(林治平，花江．南昌大学学报．1988；10(1)：20) [5]Miiller K B.In:Kiuchi M,Nishimura H,Yanagimoto J,eds.,Advanced Technology of Plasticity 2002,Pvoc 7th ICTP,Japan,2002:427 [6]He Z B,Hu W L,Wang Z R.In:Bariani P Fed,Advanced Technology of Plasticity 2005,Proc 8th ICTP,Verona,Italy:Edizioni Progetto Padova,2005:407 [7]Wang Z R.Fundamental of Plastic Working Mechanics.Beijing:National Defence Industry Press,1989:127(王仲仁．塑性加工力学基础．北京：国防工业出版社，1989：127) [8]Hu W L,He Z B,Fang Y.J Mater Process Technol,2004;151:27 [9]He Z B.PhD Dissertation,Harbin Institute of Technology,2005(何祝斌．哈尔滨工业大学博士学位论文，2005) [10]Li F,Yuan S J,Liu G.J Aeronaut Mater,2006;26(3):83(李峰，苑世剑，刘钢．航空材料学报，2006；26(3)：83) [11]Wang Z R.J Mater Proc Technol,1995;55:1 [1] 李萍, 林泉, 周玉峰, 薛克敏, 吴玉程. 纯W高压扭转显微组织演化过程TEM分析[J]. 金属学报, 2019, 55(4): 521-528. [2] 王宝顺 林奔 张麦仓 董建新. G3镍基耐蚀合金管材热挤压工艺润滑行为研究 I. 玻璃润滑膜厚度模型建立及应用[J]. 金属学报, 2011, 47(3): 367-373. [3] 王智祥; 谢建新; 刘雪峰; 李静媛; 张丁非; 潘复生 . 形变及时效对AZ91镁合金组织和力学性能的影响[J]. 金属学报, 2007, 43(9): 920-924 . Viewed Full text Abstract Cited   Shared      Discussed