Abstract: In this work, numerical simulations of the continuous extrusion extending forming process were performed for AZ31 magnesium(Mg) alloy sheet by HyperXtrude software. The effect of feeding mode on distributions of the temperature, strain and stress of the sheet during the continuous extrusion were investigated in the single-rod and double-rod extrusion. Additionally, the microstructure and mechanical properties of the extruded Mg alloy sheets were examined under the two feeding modes as well. The results show that when the 160 mm×8 mm AZ31 Mg alloy sheet is extruded under the condition of 3 r/min (63 mm/s), the strain value of the billet in the double-rod extrusion process is less than that in the single-rod extrusion. Consequently, the temperature of the metal in the double-rod extrusion is about 10 ℃ lower than that in the single-rod feeding mode during continuous extrusion. The local stress inside the cavity during the double-rod extrusion reaches 800 MPa, which is significantly greater than that during the single-rod extrusion. The overall average grain size under the condition of double-rod feeding is 17.8 μm, which is smaller and more uniform. The average tensile strength of the product obtained by double-rod feeding reaches 209 MPa, which is higher than that of the single-rod extrusion product. The tensile strength of the middle weld zone is 218 MPa, indicating that the property of the welding zone has exceeded that of the base material.
1 Zhang D F, Fang L, Liu G P, et al. Ordnance Material Science and Engineering, 2010, 33(5), 96(in Chinese). 张丁非, 方霖, 刘郭平, 等. 兵器材料科学与工程, 2010, 33(5), 96. 2 Xu H, Liu J A, Xie S S.Magnesium alloy fabrication and processing technology, Metallurgical Industry Press, China, 2007,pp.1(in Chinese). 徐河,刘静安,谢水生.镁合金制备与加工技术,冶金工业出版社,2007,pp.1. 3 Zhang S H, Xu Y, Wang Z T, et al. World Sci-Tech R & D, 2001, 23(6),18(in Chinese). 张士宏, 许沂, 王忠堂, 等. 世界科技研究与发展, 2001, 23(6),18. 4 Pan F S, Han E H. Wrought magnesium alloys with high properties and manufactural technology, Science Press, China, 2007(in Chinese). 潘复生, 韩恩厚. 高性能变形镁合金及加工技术, 北京科学出版社, 2007. 5 Han C, Sun F T. Shanghai Nonferrous Metals, 2015, 36(2),85(in Chinese). 韩晨, 孙付涛. 上海有色金属, 2015, 36(2),85. 6 Han C. Nonferrous Metals Processing, 2015, 44(4),1(in Chinese). 韩晨. 有色金属加工, 2015, 44(4),1. 7 Liu G J, Xu J, Yang L Q. Chinese Journal of Rare Metals, 2012, 36 (3),477(in Chinese). 刘国钧, 徐骏, 杨柳青. 稀有金属, 2012, 36 (3),477. 8 Zhang J. Life extension and sustainable development of materials—selection and design of magnesium alloys, Chemical Industry Press, China, 2017,pp.1(in Chinese). 张津. 材料延寿与可持续发展—镁合金选用与设计, 化学工业出版社, 2017,pp.1. 9 Yang R B, Zhang S H. Continuous extrusion forming translations, Central South University of Technology Press, China, 1989(in Chinese). 杨如柏, 张胜华. 连续挤压译文集, 中南工业大学出版社, 1989. 10 Yun X B, Song B Y, Gao F. Metal Forming Technology, 2002, 20(3),46(in Chinese). 运新兵, 宋宝韫, 高飞. 金属成形工艺, 2002, 20(3),46. 11 Wu G M, Gao F, Fu R. Hot Working Technology, 2009, 38(17),39(in Chinese). 吴桂敏, 高飞, 符蓉. 热加工工艺, 2009, 38(17),39. 12 Yang J Y, Yun X B, Zhao Y. Chinese Journal of Rare Metals, 2016,40(4),307(in Chinese). 杨俊英, 运新兵, 赵颖, 等. 稀有金属, 2016, 40(4),307. 13 Liu X, Guo L L, Fu R. Journal of Dalian Jiaotong University, 2016, 37(3),79(in Chinese). 刘学,郭丽丽,付蓉. 大连交通大学学报, 2016, 37(3),79. 14 Guo L L, Fu R, Pei J Y, et al. Rare Metal Materials and Engineering, 2017, 46(6), 1626(in Chinese). 郭丽丽, 符蓉, 裴久杨, 等. 稀有金属材料与工程, 2017, 46(6),1626. 15 Chen C Y, Guo L L. Forging and Stamping Technology, 2019, 44(9),17(in Chinese). 陈重阳, 郭丽丽. 锻压技术, 2019, 44(9),17. 16 Wu G M. Continuous extrusion process test and numerical simulation of AZ31 magnesium alloy. Master's Thesis, Dalian Jiaotong University, China, 2009(in Chinese). 吴桂敏. AZ31镁合金连续挤压工艺试验及数值模拟. 硕士学位论文, 大连交通大学, 2009. 17 Zhao Y, Song B Y, Yan Z Y. Jounrnal of Materials Processing Technology, 2016(235),149. 18 Wang H S,Fu G S, Chen Y L, et al. Materials for Mechancial Enginee-ring, 2014, 38(5),95(in Chinese). 王火生, 傅高升, 陈永禄, 等. 机械工程材料, 2014, 38(5),95. 19 Li G Z, Sun Y D, Chen D R,et al. Hot Working Technology, 2014, 43(13),118(in Chinese). 李光振, 孙颖迪, 陈秋荣, 等. 热加工工艺, 2014, 43(13), 118. 20 Zhao Y, Song B Y, Li B, et al. Journal of Plasticity Engineering, 2015, 22(1),18(in Chinese). 赵颖, 宋宝韫, 李冰,等. 塑性工程学报, 2015, 22(1),18. 21 Yuan J R.Numerical simulation and microstructure evolution of AZ31 magnesium alloy continuous extrusion sheet forming process. Master's Thesis, Dalian Jiaotong University, China, 2019(in Chinese). 苑菁茹. AZ31镁合金连续挤压板材成形工艺数值模拟与组织演化的研究. 硕士学位论文, 大连交通大学, 2019. 22 Guo L L, Yuan J R, Pei J Y,et al. Materials Science and Engineering: A, 2021, 819, 141456.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2022, Vol. 36 
