摘要
利用Fluent软件对2219铝合金连铸过程进行数值模拟,并通过小铸锭模拟试验结合数值模拟研究连铸过程中最佳超声施加方式,以达到使铸坯晶粒组织细小均匀的目的。结果表明,凝固速度不同导致铸坯内晶粒组织不均匀,超声施加方式对晶粒细化效果影响较大。当凝固时间为4 min时,在第1 min加超声细化效果较为理想,晶粒尺寸细化了24.5%;在凝固末期施加超声细化效果存在较大梯度,沿作用方向降低。连铸中宽度方向中部施加超声作用,探头应位于糊状区上方。
The continuous casting process of 2219 aluminum alloy was simulated by Fluent software.The optimal ultrasonic application mode in continuous casting process was explored to achieve the uniform grain structure of casting ingots through the combination of simulation experiment of small ingot and the numerical simulation. The results indicate that different solidification speeds lead to uneven grain structure in the continuous casting ingots, and the ultrasonic application method has a great influence on the effect of grain refinement.When the solidification time is 4 min, the ultrasonic refining is more uniform in the first minute, reaching 24.5%. At the end of solidification, the ultrasonic refinement effect has a large gradient, which is decreased along the action direction.During the continuous casting process, ultrasound was applied in the middle of the width direction, and the prober should be located above the mushy zone.
作者
王宇钊
孟令刚
亚斌
张长日
徐大召
张兴国
Wang Yuzhao;Meng Linggang;Ya Bin;Zhang Changri;Xu Dazhao;Zhang Xingguo(School of Materials Science and Engineering,Dalian University of Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2021年第10期1245-1250,共6页
Special Casting & Nonferrous Alloys
基金
国家重点研发计划资助项目(2018YFA0702903,2018YFA0702901)。
关键词
2219铝合金
铸造
超声处理
晶粒细化
2219 Aluminum Alloy
Casting
Ultrasonic Treatment
Grain Refinement
