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廖强,葛鹏,刘宇,王瑞琴.大规格Ti70合金铸锭Fe元素偏析控制[J].稀有金属材料与工程(英文),2020,49(3):968~972.[Liao Qiang,Ge Peng,Liu Yu and Wang Ruiqin.Fe Elemental Segregation Control of Large Size Ti70 Alloy Ingot[J].Rare Metal Materials and Engineering,2020,49(3):968~972.]
Fe Elemental Segregation Control of Large Size Ti70 Alloy Ingot
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Received:February 11, 2019  Revised:July 18, 2019
Key words: Large size Ti70 alloy ingot  Melting rate  segregation of Fe element  microstructure and tensile properties
Foundation item:国家重点研发计划-重点基础材料技术提升与产业化重点专项(项目号2016YFB0301202)
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Liao Qiang,Ge Peng,Liu Yu and Wang Ruiqin  
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      Large size Ti70 alloy ingot were manufactured by vacuum consumable arc melting(VAR) in this paper. The effect of melting rate on component homogeneity of Fe element was studied. Chemical composition of the ingots were measured by chemical composition analyser and compared with perp results. Micro area composition were detected with EDS. Microstructure of follow-up rolling plate was observed by a metalloscope and mechanical properties of the plate were tested by a tensile tester. The results show that the mush zone during solidification process of the ingot reducing and macrosegregation of Fe element decreasing with cutting down the melting rate to a stable level. Meanwhile, eutectic phase spacing narrowing down and microsegregation of Fe element alleviating with reducing the melting rate. The microstructure and tensile properties of the follow-up rolling plate compliancing with the standard requirements.