Study on melting simulation of Ti551 alloy ingots with spatial coordinate transformation based on MeltFlow-VAR

ZHU Zhenze; ZHOU Siyuan; ZHANG Yifan; YANG Guoqing; ZHANG Hongling; MA Yingjie

doi:10.7513/j.issn.1004-7638.2026.02.005

Volume 47 Issue 2

Apr. 2026

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ZHU Zhenze, ZHOU Siyuan, ZHANG Yifan, YANG Guoqing, ZHANG Hongling, MA Yingjie. Study on melting simulation of Ti551 alloy ingots with spatial coordinate transformation based on MeltFlow-VAR[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 37-45. doi: 10.7513/j.issn.1004-7638.2026.02.005

Citation:

ZHU Zhenze, ZHOU Siyuan, ZHANG Yifan, YANG Guoqing, ZHANG Hongling, MA Yingjie. Study on melting simulation of Ti551 alloy ingots with spatial coordinate transformation based on MeltFlow-VAR[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 37-45. doi: 10.7513/j.issn.1004-7638.2026.02.005

Citation:

ZHU Zhenze, ZHOU Siyuan, ZHANG Yifan, YANG Guoqing, ZHANG Hongling, MA Yingjie. Study on melting simulation of Ti551 alloy ingots with spatial coordinate transformation based on MeltFlow-VAR[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 37-45. doi: 10.7513/j.issn.1004-7638.2026.02.005

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Study on melting simulation of Ti551 alloy ingots with spatial coordinate transformation based on MeltFlow-VAR

doi: 10.7513/j.issn.1004-7638.2026.02.005

1.
Jiangsu Flying Cloud Titanium Alloy Material Co., Ltd., Wuxi 214105, Jiangsu, China
2.
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China

More Information

Received Date: 2026-02-01
Accepted Date: 2026-03-09
Rev Recd Date: 2026-03-01

Available Online: 2026-04-20

Publish Date: 2026-04-20

Abstract

Abstract

Vacuum arc remelting (VAR) is the key technology for the preparation of titanium alloy ingots. However, traditional processes struggle to precisely control the coupling effect of multi-physical fields, which easily leads to compositional segregation of ingots. In this paper, melting simulation research was carried out on Ti551 alloy with a target composition of Ti-5.3Al-1.5Mo-1.0V-1.0Sn-1.0Zr-1.0Cr-0.1O-0.15Fe. The MeltFlow-VAR software was adopted to simulate the solidification segregation of Ti551 titanium alloy, and four melting cases with spatial coordinate transformation were designed for Ti551 alloy ingots. By simulating the melting processes of primary and secondary ingots, the distribution characteristics of alloying elements such as Al, Mo and V under different cases were analyzed. The results show that obvious elemental segregation exists in the primary Ti551 ingot. Al, Mo and O exhibit negative segregation, while V, Sn, Zr and other elements present positive segregation, and the segregation is mainly concentrated in the riser of the ingot head and the ingot tail. Among the four cases, the cutting and welding cases have the optimal effect on improving the compositional uniformity in the middle of the ingot. Case 2 enables the elemental content in the middle region to be closer to the standard values, and case 4 effectively weakens the element concentration fluctuation of large-size long ingots. The traditional head-to-tail inversion method cannot fundamentally eliminate segregation defects, whereas the restructured melting based on spatial coordinate transformation can break the original segregation distribution pattern. In addition, Mo features a high melting point and high density with prominent negative segregation during VAR processing. The reconstruction methods including cutting and welding can regulate the transport and redistribution mechanism of Mo in the molten pool, which effectively optimizes the compositional uniformity in the middle of ingots. This study provides a technical reference for the segregation control of high-melting-point elements and the improvement of finished product rate of titanium alloy ingots.
- Ti551 titanium alloy,
- MeltFlow-VAR,
- segregation,
- numerical simulation

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References(16)

References

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