Feasibility study on Ba2ZrYO5F crucible vacuum induction melting of Ti6Al4V alloy

doi:10.3969/j.issn.1001-1935.2026.05.001

Abstract

Abstract: Vacuum induction melting is an effective low-cost technical means for preparing titanium alloys.However,its application is limited by severe contamination of alloys caused by crucibles.In this study,vacuum induction melting of Ti6Al4V alloy was carried out using a Ba₂ZrYO₅F crucible with sponge Ti,Al ingots and AlV alloy.The interfacial reactions between the crucible and Ti6Al4V alloy melt as well as the oxygen content of the melted alloy were analyzed,and the microstructure and mechanical properties of as cast Ti6Al4V alloy were evaluated.The results show that the Ba₂ZrYO₅F crucible suffers physical dissolution by Ti6Al4V alloy melt,generating Y₂O₃ and Y₂O₃(ZrO₂) on the crucible wall,with the Ba₂ZrYO₅F matrix phase remaining.Owing to intense electromagnetic stirring,the Y₂O₃ formed on the crucible wall enters the melt and forms dispersively distributed inclusions with a size of approximately 2 μm.The oxygen content of the alloy after melting is about 0.18 mass%.The as cast alloy is composed of α and β phases,with a tensile strength of 1 108 MPa and an elongation of 1.8%,and the fracture surface presents a cleavage feature.This work preliminarily verifies the feasibility of preparing the alloy by Ba₂ZrYO₅F vacuum induction melting.

Key words: vacuum induction melting, Ba₂ZrYO₅F crucible, Ti6Al4V alloy, interfacial reaction, mechanical properties

摘要： 真空感应熔炼是钛合金低成本制备的有效技术手段,但坩埚对合金的严重污染使得该技术应用受到限制。采用Ba₂ZrYO₅F坩埚,并使用海绵Ti、Al块和AlV合金,开展了Ti6Al4V合金的真空感应熔炼制备,分析了坩埚与钛合金熔体的界面反应以及熔炼后合金的氧含量,评估了铸态Ti6Al4V合金的显微结构及力学性能。结果表明:Ba₂ZrYO₅F坩埚受Ti6Al4V合金熔体的物理熔解作用,在坩埚壁生成Y₂O₃和Y₂O₃(ZrO₂),同时存在Ba₂ZrYO₅F基体相。由于强烈电磁搅拌,坩埚壁生成Y₂O₃进入熔体形成弥散分布、尺寸约2 μm的夹杂物,合金熔炼后氧含量约0.18%(w)。合金在铸态情况下由α相和β相构成,抗拉强度为1 108 MPa,延伸率为1.8%,断口呈解理状态。初步验证Ba₂ZrYO₅F坩埚真空感应熔炼制备该合金的技术具有可行性。

关键词: 真空感应熔炼, Ba₂ZrYO₅F坩埚, Ti6Al4V合金, 界面反应, 力学性能

CLC Number:

TQ175

Chen Guangyao, Guo Hang, Peng Kunjie, Dou Zhihe, Gao Pengyue, Feng Qisheng, Hou Xinmei, Li Chonghe. Feasibility study on Ba₂ZrYO₅F crucible vacuum induction melting of Ti6Al4V alloy[J]. Refractories, 2026, 60(5): 369-375.

陈光耀, 郭航, 彭坤杰, 豆志河, 高鹏越, 冯齐胜, 侯新梅, 李重河. Ba₂ZrYO₅F坩埚真空感应熔炼Ti6Al4V合金可行性研究[J]. 耐火材料, 2026, 60(5): 369-375.

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URL: http://www.nhcl.cn/EN/10.3969/j.issn.1001-1935.2026.05.001

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Feasibility study on Ba₂ZrYO₅F crucible vacuum induction melting of Ti6Al4V alloy

Ba₂ZrYO₅F坩埚真空感应熔炼Ti6Al4V合金可行性研究

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