钢铁钒钛2026，Vol.47Issue(2)：29-36,8.DOI:10.7513/j.issn.1004-7638.2026.02.004
基于VAR数值模拟的新型Ti551钛合金熔炼工艺研究
A study on the melting process of novel Ti551 titanium alloy using VAR numerical simulation
摘要
Abstract
To meet the demand for pressure-resistant materials in deep-sea equipment,this study invest-igated the melting process of a novel α+β titanium alloy Ti551 based on Vacuum Arc Remelting(VAR)numerical simulation.By optimizing parameters through numerical simulation,the melting process was directly scaled up from a 150 kg model to produce 3-ton industrial-scale ingots via VAR.The results demonstrate the successful production of high-purity,highly homogeneous 3-ton Ti551 industrial in-gots.The study focused on the effects of melting current and arc-stabilizing current on compositional homogeneity and pool profile,identifying reduced melting current as the optimal parameter.Through comparative experiments of five different melting processes,it was concluded that the optimized pro-cess conditions—a melting current of 21～24 kA,an arc-stabilizing current of 15 A,and an AC arc sta-bilization time of 30 s—yielded the best results.Based on this optimized process,the produced 3-ton in-dustrial ingots exhibited a smooth surface free from defects such as cold shuts,subsurface porosity,and slag inclusions.The ingots demonstrated good compositional uniformity,with the range of key ele-ments including Cr,Fe,Sn,V,and Zr all within 0.03,indicating no significant macrosegregation.The overall properties meet the stringent requirements for raw materials used in deep-sea equipment.关键词
新型Ti551钛合金/真空自耗电弧熔炼/数值模拟/成分均匀Key words
novel Ti551 titanium alloy/vacuum arc remelting/numerical simulation/composition uni-formity分类
矿业与冶金引用本文复制引用
罗坤,郑友平,耿乃涛,游彦军,李京懋..基于VAR数值模拟的新型Ti551钛合金熔炼工艺研究[J].钢铁钒钛,2026,47(2):29-36,8.基金项目
国家重点研发计划:深海特种装备用高均质超大尺寸钛合金构件制造关键技术(2024YFB3714200). （2024YFB3714200）
