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许耀平,陈其朋,刘源,史亚明,秦铁昌,沈厚发.EBCHR熔铸TA10钛合金非对称流动及凝固过程数值模拟[J].稀有金属材料与工程(英文),2020,49(11):3761~3768.[Xu Yaoping,Chen Qipeng,Liu yuan,Shi Yaming,Qin Tiechang and Shen Houfa.Numerical simulation of asymmetrical fluid flow and solidification during the Electron Beam Cold Hearth Re-melting(EBCHR) process of titanium alloy TA10[J].Rare Metal Materials and Engineering,2020,49(11):3761~3768.]
Numerical simulation of asymmetrical fluid flow and solidification during the Electron Beam Cold Hearth Re-melting(EBCHR) process of titanium alloy TA10
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Received:October 31, 2019  Revised:December 05, 2019
DOI:
Key words: electron beam cold hearth re-melting  fluid flow  sump evolution  asymmetry temperature distribution
Foundation item:国家重点研发计划
Author NameAffiliation
Xu Yaoping,Chen Qipeng,Liu yuan,Shi Yaming,Qin Tiechang and Shen Houfa  
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Abstract:
      Fluid flow in the solidifying pool plays an important role for the casting quality in Electron Beam Cold Hearth Re-melting (EBCHR or EB Re-melting) process. A three-dimensional unsteady state model has been built to describe the fluid flow and the sump evolution during the EBCHR process of titanium slab casting. The Mixed Lagrange and Euler (MiLE) approach was employed to investigate the unsteady state casting process. A set of asymmetrical EB power input was tested in the model to demonstrate the characteristic of the fluid flow, temperature distribution and sump profile. The results showed that the asymmetrical sump is induced by the coupling of fluid flow and heat transfer within the asymmetrical mold. Part of the inlet fluid infiltrates the solidifying shell, and part of the inlet fluid rebounds to the melt surface. The infiltration of downward inlet flow reduces the solidifying shell, while the rebound of upward inlet flow enforces the heat absorption along the melt surface. The sump asymmetry can be adjusted with optimization of the EB power density.