摘要
为探究工艺参数对7003铝合金型材在线气雾淬火的影响,建立7003挤压铝合金型材在线气雾淬火仿真模型,研究7003挤压铝合金型材在线气雾淬火过程中温度场与应力场的变化,并通过淬火实验验证了型材在线气雾淬火仿真模型的可靠性.采用响应面优化法探究型材运行速度、纵向喷嘴间距以及周向气雾冷却喷嘴气水比对型材在线气雾淬火时间以及淬火过程中最大等效应力的影响规律,得到该型材在线气雾淬火最优的生产工艺参数.研究结果表明,该型材的最佳工艺参数分别为:型材运行速度30 mm/s,纵向喷嘴间距155 mm,气水比1.32.与优化前相比,型材在线气雾淬火时间减少了33.1%,淬火过程中的最大等效应力减小了21.2%,最大残余应力减小了62.9%,型材在线气雾淬火的效率及淬火质量显著提高.
To investigate the influence of process parameters on the online aerosol spray quenching of 7003 aluminum alloy profiles,a simulation model for online aerosol spray quenching of 7003 extruded aluminum alloy profiles was established in this study.The variations of the temperature and stress fields during the aerosol spray quenching process of 7003 aluminum alloy profiles were studied,and the reliability of the aerosol spray quenching simulation model for the profiles was verified by quenching experiments.The response surface optimization method was used to investigate the influence of profile running speed,longitudinal nozzle spacing,and air water ratio of circumferential air mist cooling nozzle on the online quenching time and maximum equivalent stress during the quenching process of the profile.The optimal production process parameters for online aerosol spray quenching of the profile are obtained.The research results show that the optimal process parameters are a profile running speed of 30 mm/s,a longitudinal nozzle spacing of 155 mm,and an air water ratio of 1.32.Compared with the pre-optimized parameters,the online aerosol sprap quenching time of the profile is reduced by 33.1%,the maximum equivalent stress during the quenching process is reduced by 21.2%,and the maximum residual stress is reduced by 62.9%.The efficiency and quenching quality of the profile online aerosol quenching are significantly improved.
作者
刘国勇
曾贤文
朱冬梅
LIU Guoyong;ZENG Xianwen;ZHU Dongmei(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shunde Innovation School,University of Science and Technology Beijing,Foshan 528399,China)
出处
《湖南大学学报(自然科学版)》
北大核心
2025年第2期34-45,共12页
Journal of Hunan University:Natural Sciences
基金
广东省重大领域研发计划项目(2020B010186002)。
关键词
铝合金
淬火
变形
数值模拟
气雾冷却
响应面优化
aluminum alloys
quenching
deformation
numerical simulation
aerosol sprap cooling
response surface optimization
作者简介
通信联系人:刘国勇(1969-),男,湖北宜城人,北京科技大学副教授,博士,E-mail:gy_liu666@ustb.edu.cn。
