回转角对AZ31镁合金管材冷轧成形过程的影响  

Influence of Rotation Angle on Cold Rolling Forming Process of AZ31 Magnesium Alloy Tubes

作　　者：薛春 楚志兵[1,2] 苏辉 李伟 李玉贵[1] 马立峰[1] Xue Chun;Chu Zhibing;Su Hui;Li Wei;Li Yugui;Ma Lifeng(Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Mechanics and Civil 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12期4041-4049,共9页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(U1710113);National Key R&D Program of China(2018YFB1307902);China Postdoctoral Science Foundation(2017M622903);Key Research and Development Program of Shanxi Province(201703D111003,201703D111002,201703D121008);Joint Postgraduate Training Base of Shanxi Province(2018JD33);Postgraduate Education Innovation Program of Shanxi Province(2019SY482)。

摘　　要：以冷轧AZ31镁合金管材为研究对象,对不同回转角下的冷轧过程进行了完整的仿真,对比分析了不同回转角在各特征变形阶段对等效应力、等效塑性应变及节点温度的影响规律。结果表明,随着回转角的增大,等效应力、等效塑性应变以及节点温度均增大。借助元胞自动机模型以及实验等手段,通过实验与数值仿真结果对比分析,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,并发现50°的回转角可以更好的满足工艺要求。本研究可为镁合金管材冷轧成形回转角的选择提供依据。Cold-rolled AZ31 magnesium alloy tube was used as the research object.Based on the cold-rolling process under different rotation angles,the effects of different rotation angles on the characteristics of equivalent stress,equivalent plastic strain and node temperature during deformation were investigated.Results shows that increasing the rotation angles can increase the equivalent stress,equivalent plastic strain and node temperature.With the aid of the automaton model and experimental means,through the contrast analysis of experiment and numerical simulation results,the preliminary structure evolution law of continuous recrystallization and refinement in the rolling process was analyzed.The results reveal that a 50°rotation angle can meet the technical requirements and provide evidence for the appropriate selection of rotation angles for cold-rolled magnesium alloy tubes.

关 键 词：三辊式冷轧 回转角 数值仿真 元胞自动机 

分 类 号：TG335.12[金属学及工艺—金属压力加工]