Numerical study of aluminum segregation during electron beam cold hearth melting for large-scale Ti-6 wt%Al-4 wt%V alloy slab ingots

Lei Gao; Hai-guang Huang; Christoph Kratzsch; Hong-ming Zhang; Kinnor Chattopadhyay; Ye-hua Jiang; Rong Zhou

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Numerical study of aluminum segregation during electron beam cold hearth melting for large-scale Ti-6 wt%Al-4 wt%V alloy slab ingots

机译：大型Ti-6 wt％Al-4 wt％V合金板坯电子束冷炉膛熔化过程中铝偏析的数值研究

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To investigate aluminum (Al) segregation in large-scale Ti-6 wt%Al-4 wt%V (TC4) slab ingots produced by electron beam cold hearth melting (EBCHM), a three-dimensional multiphysics model verified with experimental data in the literature has been established. The numerical predictions qualitatively revealed the macrosegregation tendency of Al in the molten and the solidified region at different casting conditions. It was noticed that Al segregation is slightly influenced by increasing casting speed due to the vertical evolution of the pool shape near the inlet. A promising solution for Al segregation control is to limit the Al evaporation loss by decreasing the pouring temperature. The results suggest that for EBCHM with a casting speed of 8 mm/min, as the pouring temperature decreases from 2273 to 2073 K, the segregation degree φ_I increases from 0.70 to 0.96 in the pool. As a consequence, the corresponding segregation degree φ_c on the solidified cross-section improves (increases from 0.67 to 0.93).

机译：为了研究通过电子束冷炉床熔化（EBCHM）产生的大规模Ti-6 wt％Al-4 wt％V（TC4）板坯中的铝（Al）偏析，该三维多物理场模型已通过实验中的实验数据验证文学已经建立。数值预测定性地揭示了在不同铸造条件下，铝在熔融和凝固区的宏观偏析趋势。注意到，由于入口附近熔池形状的垂直演变，铸造速度的提高会稍微影响铝的偏析。控制铝偏析的一种有前途的解决方案是通过降低浇铸温度来限制铝的蒸发损失。结果表明，对于浇铸速度为8 mm / min的EBCHM，随着浇铸温度从2273降低至2073 K，熔池中的偏析度φ_I从0.70升高至0.96。结果，凝固截面上相应的偏析度φ_c提高了（从0.67增加到0.93）。

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来源
《International Journal of Heat and Mass Transfer》 |2020年第2期|118976.1-118976.10|共10页
作者
Lei Gao; Hai-guang Huang; Christoph Kratzsch; Hong-ming Zhang; Kinnor Chattopadhyay; Ye-hua Jiang; Rong Zhou;
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作者单位

Key Laboratory of Green-Chemistry Materials in University of Yunnan Province Yunnan Minzu University Kunming 650500 China Kunming University of Science and Technology Kunming 650093 China;

R&D Center Yunnan Titanium Industry Co. Ltd. Chuxiong 675000 China;

Oststraβe 45 04317 Leipzig Saxony Germany;

Kunming University of Science and Technology Kunming 650093 China;

Faculty of Applied Science and Engineering Department of Materials Science and Engineering Cross Appointed to Mechanical and Industrial Engineering Process Metallurgy Research Labs University of Toronto Toronto Ontario M5S 3E4 Canada;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Electron beam cold hearth melting; Ti-6 wtAl-4 wtV slab ingots; Aluminum evaporation; Macrosegregation control;

机译：电子束炉床熔化;Ti-6 wt％Al-4 wt％V板锭;铝蒸发;宏观隔离控制;

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Numerical study of aluminum segregation during electron beam cold hearth melting for large-scale Ti-6 wt%Al-4 wt%V alloy slab ingots

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