基于MeltFlow-VAR的TC17钛合金铸锭熔炼工艺研究
Research on the melting process of TC17 titanium alloy ingots based on MeltFlow VAR
李彤 1华倩 1刘华 1王超南 1曹江海1
作者信息
- 1. 西部钛业有限责任公司,陕西西安 710201
- 折叠
摘要
TC17钛合金因其优异的力学性能、热稳定性和抗疲劳性能,广泛应用于航空航天等领域.然而,该合金在真空自耗电弧熔炼过程中出现的元素偏析的现象,影响了铸锭的性能,限制其应用和发展.本文利用多场耦合重熔工艺仿真优化软件(MeltFlow-VAR)对TC17钛合金铸锭真空自耗熔炼过程中的熔炼电流、稳弧电流等熔炼工艺参数进行模拟,研究不同参数下熔池的形状和元素浓度分布,并以模拟工艺制备了TC17合金Φ640 mm大规格铸锭进行验证.结果表明,适当减小熔炼电流和稳弧电流,可使TC17钛合金铸锭中Cr、Mo元素分布均匀,从而有效改善元素偏析的现象.通过对后续铸锭的追踪取样验证,本次试验所生产的TC17钛合金铸锭成分均匀,未发现明显的组织缺陷.
Abstract
TC17 titanium alloy is widely used in aerospace and other fields due to its excellent mechanical proper-ties,thermal stability,and fatigue resistance.However,the phenomenon of element segregation in the vacuum consum-able arc melting process of this alloy affects the performance of the ingot and limits its application and development.This article uses the Multi Field Coupled Remelting Process Simulation and Optimization Software(MeltFlow VAR)to simu-late the melting current,stable arc current,and other melting process parameters during the vacuum self consumption melting process of TC17 titanium alloy ingots.The shape of the melt pool and the distribution of element concentration under different parameters are studied,and the simulation process is used to prepare a large specification TC17 alloy ingot with a diameter of 640mm for verification.The results indicate that reducing the melting current and stabilizing arc cur-rent appropriately can make the distribution of Cr and Mo elements in TC17 titanium alloy ingots uniform,thereby effec-tively improving the phenomenon of element segregation.Through tracking and sampling verification of subsequent in-gots,it was found that the TC17 titanium alloy ingots produced in this experiment had uniform composition and no ob-vious structural defects were found.
关键词
TC17钛合金/MeltFlow-VAR/熔炼模拟Key words
TC17 titanium alloy/MeltFlow-VAR/smelting simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据