在多向锻造过程中温度场对7075铝合金组织的影响  

Effect of Temperature Filed on Microstructure of 7075 Aluminum Alloy in Multidirectional Forging Process

作　　者：刘晓红[1] 郭焕亮 张磊[1] 郭聪 LIU Xiaohong;GUO Huanliang;ZHANG Lei;GUO Cong(Guangxi Colleges and Universities Key Laboratory of Modem Design and Advanced Manufacturing, College of Mechanical Engineering, Guangxi University, Nanning 530004, China)

机构地区：[1]广西大学机械工程学院广西高校现代设计与先进制造重点实验室,广西南宁530004

出　　处：《铸造技术》2018年第5期1056-1058,共3页Foundry Technology

基　　金：国家自然科学基金资助项目(51061005);广西高校现代设计与先进制造重点实验室开放基金项目(GXXD16YB-01)

摘　　要：运用Deform 3D软件,研究了7075铝合金多向锻造过程中实际情况难以测量的参数对锻件成型质量的影响。以温度为变量,采用等温锻造和变温锻造对相同尺寸的毛坯进行锻造,初始的锻造温度为450℃,对比研究了两种锻造过程中毛坯所受到的应力、金属流速、金属流线以及晶粒大小等参数的差异。结果表明,7075铝合金变温锻造表面容易产生撕裂现象,等温锻造金属流线更好,组织更加均匀。镦粗和拔长的次数足够多,均可以达到晶粒细化效果,等温锻造晶粒尺寸更小,分布更均匀。The Deform 3D software was used to study the influence of the parameters that were difficult to measure in the forging process of 7075 aluminum alloy. With temperature as variables, the isothermal forging and forging blank of the same size forging, the initial forging temperature was 450℃, the differences of stress, metal flow rate, metal flow line and grain size were studied in the two forging processes. The results show that the surface of 7075 aluminum alloy is prone to tear, and the isothermal forging line is better and the structure is more uniform. The number of upsetting and drawing is enough to achieve the grain refining effect, the isothermal forging grain size is smaller and more uniform distribution.

关 键 词：7075铝合金 多向锻造 有限元分析 DEFORM 3D 

分 类 号：TG319[金属学及工艺—金属压力加工]