镦拔对A1-Zn-Mg-Cu合金变形和组织的影响.pdfVIP

第 36 卷第4 期 2011 年8 月 极 Ii.. Jt 丰 Vo l. 36 No.4 FORGING 8TAMPING TECHNOLOGY Aug. 2011 徽拔对 AI-Zn-Mg-Cu 合金变形和组织的影响 自林掘，陈慧琴 (太原科技大学材料科学与工程学院，山西太原 030024) 摘要:采用有限元软件Deform-3D 对一种新型A!-Zn-Mg-Cu 系高强铝合金进行了徽粗、拔长和徽拔连续变形实验 研究，获得了变形体内部微观组织演变规律及应变分布规律。分析结果表明=相同锻比条件下，徽粗变形体内大部 分区域的等效应变值在 0.4-1. 68 之间，中心大变形区的组织以拉长晶粒为主，并有少许再结晶晶粒，其它区域的 组织沿变形方向发生不同程度的变形z 拔长变形体内大部分区域的等效应变值在 0.74-1. 96 之间，组织均发生较 剧烈变形，拉长的原始晶粒组织周围存在细小的再结晶新晶粒，等效应变值较高且变形更加均匀;总锻比相同的徽 拔连续变形条件下，拔*分锻比大于徽粗分锻比时的等效应变较高，组织细小均匀。研究结果对实际生产有一定的 指导意义。 关键词: AI-Zn-Mg-Cu 合金p 变形E 显微组织z 徽粗;拔长 001: 10. 3969/j. 肌1000-3940.2011.04.33 中图分类号: 1G142.41 文献标识码:A 文章编号: 1000-3940 (2011) 04-0134-05 Influence of up崎tting and drawing on defonnation and microstructure of A1-Zn-Mg-Cu aJloy BAI Lin-zhen , CHEN 81问in (Material Science and Engineering Institute , Taiyuan University of Science and Technology , Taiyuan 030024 , China) Abstract: Finite element software Deform-3D was used to sÏmulate the upsetting , drawing and upsetting-drawing of AI- Zn-Mg-Cu alloy. And strain distribution in the deformed billets was obtained. The results of simulation and tests show that at the same forging reduction , the value of effective strain in the upsetting billet is in the range of O. 4 - 1. 68. And the organization in the large deformation are prolonged grains with fewer re-crystallized new grains in the center , dif- ferent degree of defo口nation grains are observed in the other locations; the value of effective strain in the drawing billet is in the range of O. 74 -1. 96. Microstructure subjected to large deformation , and more prolonged grains with re-crys- talliz