大规格薄壁镁合金无缝管二辊斜轧穿孔的数值模拟  

Numerical Simulation of Two-roll Skew-rolling Piercing for Large-scale Thin-walled Magnesium Alloy Seamless Tubes

作　　者：胡建华[1] 靳帅帅 丁小凤[2] 赵春江[2] 梁建国 张国庆 HU Jianhua;JIN Shuaishuai;DING Xiaofeng;ZHAO Chunjiang;LIANG Jianguo;ZHANG Guoqing(College of Material Science and Engineering,Taiyuan Univ ersity of Science and Technology,Taiyuan 030024,China;Shanxi Provincial Key Laboratory of Metallurgical Equipment Design Theory and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Taiyuan Qinghong Mechanical&Electrical Equipment Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原科技大学山西省冶金设备设计及技术重点实验室,山西太原030024 [3]太原理工大学机械交通工程学院,山西太原030024 [4]太原磬泓机电设备有限公司,山西太原030024

出　　处：《热加工工艺》2024年第1期95-99,104,共6页Hot Working Technology

基　　金：山西省科技重大专项资助项目(20191102009);山西省重点研发计划项目(201903D121049)。

摘　　要：目前,采用三辊斜轧穿孔的大规格薄壁镁合金管容易出现尾三角。因此,本文提出采用二辊锥辊穿制坯料直径为110 mm的大规格AZ31镁合金薄壁无缝管的方法。分析了二辊和三辊斜轧穿孔的原理,根据镁合金材料的特点,制定了相应的变形工艺参数,并采用Deform-3D有限元软件对整个过程进行了数值模拟。分析了等效应变、轧制速度、等效应力等结果。模拟结果表明,管形均匀,尾部截面圆整。At present,the three-roll cross-rolled perforated large-sized thin-walled magnesium alloy tubes are prone to form tail triangles.Therefore,a method of large-size AZ31 magnesium alloy thin-walled seamless pipes produced with a billet diameter of 110 mm by using two cone rolls was proposed.The principle of two-roll and three-roll cross-rolling piercing was analyzed.According to the characteristics of magnesium alloy materials,the corresponding deformation process parameters were formulated,and the whole process was numerically simulated by Deform-3D finite element software.The results of equivalent strain,rolling speed,and equivalent stress were analyzed.The simulation results show that the tube shape is uniform and the tail section is round.

关 键 词：大规格AZ31镁合金 无缝管 尾三角现象 二辊锥辊斜轧穿孔 

分 类 号：TG339[金属学及工艺—金属压力加工]