圆台形坯料对镁合金轮毂锻造成形过程的影响  

Effect of Truncated Cone Billet on Forging Forming Process of Magnesium Alloy Wheel

作　　者：祝亚同 蒋燕超 乐启炽 廖启宇 于晓强 王彤 ZHU Yatong;JIANG Yanchao;LE Qichi;LIAO Qiyu;YU Xiaoqiang;WANG Tong(Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学材料科学与工程学院,辽宁沈阳110819

出　　处：《热加工工艺》2025年第2期97-102,共6页Hot Working Technology

基　　金：国家自然科学基金项目(51901037);高等学校学科创新引智计划2.0(111计划2.0)项目(BP0719037)。

摘　　要：锻造镁合金轮毂存在轮辐处晶粒粗大、组织分布不均匀、再结晶程度低和上轮缘容易开裂等问题。为了细化轮辐处的微观组织,改善轮辐处的组织均匀性,提高轮毂的使用性能与成品率,提出一种圆台形坯料,并采用数值模拟的方法,探究了圆台形坯料对AZ80镁合金轮毂锻造过程中的有效应变、动态再结晶体积分数、平均晶粒尺寸和损伤的影响。结果表明:圆台形坯料相较于传统圆柱形坯料能够明显改善成形过程中的坯料流动情况,提高轮辐部位的有效应变,促进轮辐部位的动态再结晶,使得晶粒尺寸分布均匀,并且降低了上轮缘处的开裂趋势。There are some problems with forged magnesium alloy wheels,such as coarse grains at the spokes,uneven grain size distribution,low recrystallization and easy cracking of the upper rim.In order to refine the microstructure at the spokes,improve the uniformity of the microstructure at the spokes,and improve the performance and yield of the wheel,a truncated cone billet was proposed and the numerical simulation method was used to explore the effect of truncated cone billet on the effective strain,dynamic recrystallization volume fraction,average grain size and damage during the forging of AZ80 magnesium alloy wheel.The results show that compared with the traditional cylindrical billet,the truncated cone billet can obviously change the material flow in the forming process,increase the effective strain of the spokes,significantly increase the recrystallization volume fraction of the spokes,make the grain size distribution uniform and reduce the cracking tendency of the upper rim.

关 键 词：镁合金轮毂 圆台形坯料 数值模拟 锻造 

分 类 号：TG379[金属学及工艺—金属压力加工]