EB炉熔铸Ti-Al基合金铸锭的成分偏析控制  

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

作　　者：凌叶青 李倩男 郑贺文 段利平[1,2] 黄海广 陈菓[1,2,4] 高磊 Ling Yeqing;Li Qiannan;Zheng Hewen;Duan Liping;Huang Haiguang;Chen Guo;Gao Lei(Key Laboratory of Green-Chemistry Materials in University of Yunnan Province,Yunnan Minzu University;Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan,Yunnan Minzu University;Yunnan Titanium Co.,Ltd.;Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming University of Science and Technology)

机构地区：[1]云南民族大学云南省高校绿色化学材料重点实验室,昆明650000 [2]云南民族大学云南省跨境民族地区生物质资源清洁利用国际联合研究中心,昆明650000 [3]云南钛业股份有限公司,昆明650000 [4]昆明理工大学非常规冶金教育部重点实验室

出　　处：《特种铸造及有色合金》2020年第9期971-974,共4页Special Casting & Nonferrous Alloys

基　　金：中国博士后基金面上资助项目(2018M633421)。

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。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.

关 键 词：TI-AL基合金 EB炉 成分偏析控制 数值模拟 

分 类 号：TG146.23[一般工业技术—材料科学与工程] G353.11[金属学及工艺—金属材料]