铸造技术2025，Vol.46Issue(5)：491-498,8.DOI:10.16410/j.issn1000-8365.2025.5060
基于ProCAST的TC18钛合金泵体真空凝壳铸造工艺仿真研究
Simulation of the TC18 Titanium Alloy Pump Vacuum Condensing Shell Casting Process via ProCAST
摘要
Abstract
On the basis of the ProCAST finite element simulation platform,the TC18 titanium alloy pump vacuum condensing shell casting process was optimized.The difference in rheological properties between the TC18 and TC4 titanium alloys was quantitatively analysed by constructing a Newtonian fluid constitutive model,and the optimal pouring temperature of TC18 was determined to be 1 770 ℃.A three-dimensional fluid-solid coupling model of the pump body was established,and the filling behavior and solidification characteristics of the melt were systematically compared between the traditional top pouring system and the improved bottom pouring system.The results show that the turbulent flow of liquid metal(the flow rate decreases by 38.6％)is effectively restrained after the pouring system is optimized,and the volume fraction of shrinkage porosity is reduced by 74.3％.Moreover,the secondary dendrite spacing is reduced by 21.4％,and the tensile strength of key parts is increased by 15.5％.The reliability of the simulation results is verified via X-ray flaw detection and tensile tests.关键词
TC18钛合金/真空凝壳铸造/数值模拟/枝晶生长/缺陷控制Key words
TC18 titanium alloy/vacuum shell casting/numerical simulation/dendrite growth/defect control分类
金属材料引用本文复制引用
谭聪,赵杰,何宇航,董英杰,邓洪宇,滕凤远,王镜钢,罗渝琨..基于ProCAST的TC18钛合金泵体真空凝壳铸造工艺仿真研究[J].铸造技术,2025,46(5):491-498,8.基金项目
攀枝花市省级定向财力转移支付科技项目(22ZYZF-GG-04) （22ZYZF-GG-04）
