A study on the melting process of novel Ti551 titanium alloy using VAR numerical simulation

LUO Kun; ZHENG Youping; GENG Naitao; YOU Yanjun; LI Jingmao

doi:10.7513/j.issn.1004-7638.2026.02.004

Volume 47 Issue 2

Apr. 2026

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LUO Kun, ZHENG Youping, GENG Naitao, YOU Yanjun, LI Jingmao. A study on the melting process of novel Ti551 titanium alloy using VAR numerical simulation[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 29-36. doi: 10.7513/j.issn.1004-7638.2026.02.004

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LUO Kun, ZHENG Youping, GENG Naitao, YOU Yanjun, LI Jingmao. A study on the melting process of novel Ti551 titanium alloy using VAR numerical simulation[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 29-36. doi: 10.7513/j.issn.1004-7638.2026.02.004

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A study on the melting process of novel Ti551 titanium alloy using VAR numerical simulation

doi: 10.7513/j.issn.1004-7638.2026.02.004

LUO Kun^{1, 2
,},
ZHENG Youping^{1, 2},
GENG Naitao¹,
YOU Yanjun²,
LI Jingmao^{2
,
,}

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China
2.
Chengdu Advanced Metal Materials Industrial Technology Research Institute Co., Ltd, Chengdu 610300, Sichuan, China

More Information

Received Date: 2025-11-17
Accepted Date: 2026-02-04
Rev Recd Date: 2026-01-22

Available Online: 2026-04-20

Publish Date: 2026-04-20

Abstract

Abstract

To meet the demand for pressure-resistant materials in deep-sea equipment, this study investigated 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 ingots. 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 process conditions—a melting current of 21~24 kA, an arc-stabilizing current of 15 A, and an AC arc stabilization time of 30 s—yielded the best results. Based on this optimized process, the produced 3-ton industrial 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 elements 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.
- novel Ti551 titanium alloy,
- vacuum arc remelting,
- numerical simulation,
- composition uniformity

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References(20)

References

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