铸造技术2025，Vol.46Issue(9)：855-864,10.DOI:10.16410/j.issn1000-8365.2025.5068
电子束冷床熔炼TA2钛合金铸坯缩孔及凝固组织数值模拟
Numerical Simulation of the Shrinkage Porosity and Solidification Microstructure of TA2 Titanium Alloy Ingots Prepared with the EBCHM
摘要
Abstract
Titanium alloy continuous casting technology is highly important for achieving efficient and low-cost production of high-performance titanium alloy materials and promoting their large-scale application in high-end fields such as aerospace,medical,and other advanced sectors.To investigate the effects of continuous electron beam melting and solidification process parameters on the solidification structure of titanium alloy ingots,numerical simulations were conducted for the temperature field,flow field,and solidification structure during the continuous casting process.The impacts of titanium liquid superheating and the casting withdrawal rate on the internal shrinkage porosity and solidification microstructure of continuously cast titanium alloy plates were investigated.The results indicate that reducing the degree of superheating and decreasing the withdrawal rate lead to grain refinement;reducing the degree of superheating and increasing the withdrawal rate causes an increase in shrinkage porosity defects in the ingot,thereby reducing the quality of the ingot.When the withdrawal rate is 10 cm/min,the volume fraction of shrinkage porosity is 2.01％.This study demonstrates that when the withdrawal rate is 5 cm/min and the superheating rate is approximately 100 ℃,it is possible to simultaneously achieve fine-grained,low-defect TA2 alloy continuous casting slab ingots.关键词
钛合金板材/连铸/凝固组织/数值模拟Key words
titanium alloy sheet/continuous casting/casting microstructure/numerical simulation分类
矿业与冶金引用本文复制引用
彭博,李阳,罗许,杨劼人..电子束冷床熔炼TA2钛合金铸坯缩孔及凝固组织数值模拟[J].铸造技术,2025,46(9):855-864,10.基金项目
四川省重点研发攀西专项(SC2022A1C01J) （SC2022A1C01J）
四川省科技重大专项课题(2023ZDX0026) （2023ZDX0026）
