轧制速度对AZ31镁合金管材冷轧成形的影响  

Effect of Rolling Speed on Cold Rolling Forming of AZ31 Magnesium Alloy Tubes

作　　者：楚志兵[1,2] 苏辉 李伟 薛春[1] 李玉贵 马立峰[1] Chu Zhibing;Su Hui;Li Wei;Xue Chun;Li Yugui;Ma Lifeng(Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Machanics and Architectural Engineering,Jinan University,Guangzhou 510632,China)

机构地区：[1]太原科技大学重型机械教育部工程研究中心,山西太原030024 [2]暨南大学力学与建筑工程学院,广东广州510632

出　　处：《稀有金属材料与工程》2020年第9期3265-3272,共8页Rare Metal Materials and Engineering

基　　金：国家重点研发计划项目(2018YFB1307902);国家自然科学基金资助项目(U1710113);中国博士后科学基金(2017M622903);山西省重点研发计划重点项目(201703D111003,201703D111002);山西省重点研发计划一般项目(201703D121008);山西省研究生联合培养基地人才培养项目(2018JD33);山西省研究生教育创新项目。

摘　　要：轧制速度是三辊式冷轧成形过程中关键的工艺参数,决定其力学特征及温升情况。基于此,以冷轧AZ31镁合金管材为研究对象,通过全流程数值仿真计算,对比分析不同轧制速度在各特征变形段对等效应力、等效塑性应变及节点温度的影响规律。结果表明,等效应力、等效塑性应变及节点温度均随轧制速度的增大而增大。通过元胞自动机模型及实验等手段,探明了晶粒在轧制过程中产生连续再结晶并细化的初步组织演变规律;对比分析实验与模拟结果并结合多方面因素,得到800 mm/s的轧制速度可以更好的满足工艺要求的结果,为冷轧镁合金管材轧制速度的选择提供依据。The rolling speed is one of the key processing parameters in the three-roll cold rolling forming process,which determines its mechanical characteristics and temperature rise.Based on this phenomenon,taking cold-rolled AZ31 magnesium alloy tubes as the research object,this paper analyzes and compares the influence of different rolling speeds on the equivalent stress,equivalent plastic strain and joint temperature of each characteristic deformation section by numerical simulation.The results show that these parameters increase with the increase of rolling speed.By means of the cellular automaton model and experiment,the preliminary evolution law of continuous recrystallization and refinement of the grain during the rolling process was proved.A speed of 800 mm/s was obtained by combining the comparative analysis experiment and simulation results with various factors,which can better meet the requirements of the process requirements.It provides a basis for the selection of rolling speed of cold-rolled magnesium alloy tubes.

关 键 词：三辊式冷轧 AZ31镁合金管材 轧制速度 元胞自动机 

分 类 号：TG146.21[一般工业技术—材料科学与工程]