Numerical Modeling and Macro-segregation Control Mechanism of Ti-Al Based Alloy Ingots during EBCHM

Ling Yeqing; Li Qiannan; Zheng Hewen; Duan Liping; Huang Haiguang; Chen Guo; Gao Lei

doi:10.15980/j.tzzz.2020.09.009

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Numerical Modeling and Macro-segregation Control Mechanism of Ti-Al Based Alloy Ingots during EBCHM
Vol. 40, Issue 9, Pages: 971-974(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.09.009

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[1]凌叶青,李倩男,郑贺文,段利平,黄海广,陈菓,高磊.EB炉熔铸Ti-Al基合金铸锭的成分偏析控制[J].特种铸造及有色合金,2020,40(09):971-974.

Ling Yeqing, Li Qiannan, Zheng Hewen, et al. Numerical Modeling and Macro-segregation Control Mechanism of Ti-Al Based Alloy Ingots during EBCHM. [J]. Special Casting & Nonferrous Alloys 40(9):971-974(2020)
[1]凌叶青,李倩男,郑贺文,段利平,黄海广,陈菓,高磊.EB炉熔铸Ti-Al基合金铸锭的成分偏析控制[J].特种铸造及有色合金,2020,40(09):971-974. DOI： 10.15980/j.tzzz.2020.09.009.

Ling Yeqing, Li Qiannan, Zheng Hewen, et al. Numerical Modeling and Macro-segregation Control Mechanism of Ti-Al Based Alloy Ingots during EBCHM. [J]. Special Casting & Nonferrous Alloys 40(9):971-974(2020) DOI： 10.15980/j.tzzz.2020.09.009.

摘要

在EB炉的熔炼过程中存在Ti-Al基合金锭成分控制不足而引发的冶金缺陷

降低钛材品质。经验表明

为确保EB炉熔炼钛合金铸锭符合成分设计标准

需以实际冷床及结晶器为对象建立数值模型

计算EB炉熔铸过程中的各元素挥发损耗

设计Al等合金元素的补充制度

平衡挥发引起的浓度梯度

抑制铸锭宏观偏析。针对国内外EB炉熔铸Ti-Al基合金铸锭的成分宏观偏析控制机制的研究现状进行了评述

为国内钛产业链上游生产中的核心问题提供借鉴。

Abstract

There are still metallurgical defects in the Ti-Al based alloy ingots caused by the inadequate control in the practical EBCHM production

which is harmful for the quality of subsequent titanium products.To ensure that EBCHM titanium alloy ingot meets the composition design standard

numerical models can be established based on cooling bed and crystallizer to calculate the evaporating loss of each element during the casting process.Therefore

the complement system of each element was designed

and the concentration gradient caused by evaporation was balanced

which restrained the macro-segregation of ingots.The research status of macro-segregation control mechanism at home and abroad was reviewed

which provided the guidance for the key issues of titanium industry chain upstream production.