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材料导报  2023, Vol. 37 Issue (1): 21080061-6    https://doi.org/10.11896/cldb.21080061
  金属与金属基复合材料 |
电子束熔炼新型Ni-Co基高温合金过程中合金元素的挥发行为及熔池温度计算
王以霖1,2, 谭毅1,2,*, 崔传勇3, 游小刚1,2, 赵龙海1,2, 崔弘阳1,2, 李鹏廷1,2, 李晓娜1,4
1 大连理工大学材料科学与工程学院,辽宁 大连 116024
2 辽宁省载能束冶金及先进材料制备重点实验室,辽宁 大连 116024
3 中国科学院金属研究所高温合金部,沈阳 110016
4 大连理工大学三束材料改性教育部重点实验室,辽宁 大连 116024
Evaporation Behavior of Alloying Elements and Calculation of Molten Pool Temperature in Electron Beam Smelting of a New Ni-Co Based Superalloy
WANG Yilin1.2, TAN Yi1,2,*, CUI Chuanyong3, YOU Xiaogang1,2, ZHAO Longhai1,2, CUI Hongyang1,2, LI Pengting1,2, LI Xiaona1,4
1 School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024 , Liaoning, China
2 Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, Liaoning, China
3 Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China
4 Key Laboratory of Material Modification by Laser, Ion and Electron Beam Ministry of Education, Dalian University of Technology, Dalian 116024, Liaoning, China
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摘要 本工作采用电子束熔炼方法制备了新型Ni-Co基高温合金,对熔炼后铸锭的显微组织、成分、合金元素挥发行为以及熔池表面温度分布进行了研究。结果表明,随着熔炼功率的增加,铸锭的显微组织越来越细,质量损失越来越大。熔炼后Cr和Al的质量分数下降,其余元素质量分数上升。在相同温度下,纯元素Al的饱和蒸气压最大,W的饱和蒸汽压最小。将熔体系统简化为 Ni-Cr-Co 三元合金模型来研究其挥发行为,合金元素的活度系数和活度可采用Miedema模型预测,Ti、Mo、W元素的理论挥发速率很小,挥发损失基本可以忽略不计。Al元素的挥发速率通过引入活度系数补偿因子计算。熔炼功率为10 kW、12 kW、14 kW时熔池的平均温度分别为1 863.6 K、1 890.6 K和1 904.3 K,对应的熔池最高温度分别为2 368.1 K、2 402.4 K、2 419.8 K。
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王以霖
谭毅
崔传勇
游小刚
赵龙海
崔弘阳
李鹏廷
李晓娜
关键词:  高温合金  电子束熔炼  元素挥发  温度分布    
Abstract: A new Ni-Co based superalloy was prepared by electron beam smelting. The microstructure, composition, volatilization behavior of alloy elements and temperature distribution of molten pool surface were studied. The results show that with the increase of melting power, the microstructure of ingot is finer and the mass loss is larger. After smelting, the mass fractions of Cr and Al decrease, and the mass fraction of the remaining elements increase. At the same temperature, the saturated vapor pressure of pure Al element is the highest and that of W is the lowest. The melt system was simplified to a Ni-Cr-Co ternary alloy model to study its volatilization behavior. The activity coefficients and activities of alloying elements can be predicted by Miedema model. The theoretical volatilization rates of Ti, Mo and W elements are very small, and the volatilization loss can be ignored basically. The volatilization rate of Al element was calculated by introducing activity coefficient compensation factor. The ave-rage temperature of the molten pool with the melting power of 10 kW, 12 kW and 14 kW is 1 863.6 K, 1 890.6 K and 1 904.3 K respectively, and the corresponding maximum temperature of the molten pool is 2 368.1 K, 2 402.4 K and 2 419.8 K.
Key words:  superalloy    electron beam smelting    element evaporation    temperature distribution
出版日期:  2023-01-10      发布日期:  2023-01-31
ZTFLH:  TF134  
基金资助: 国家重点研发计划(2019YFA0705300);国家自然科学基金(52004051);大连市重点领域创新团队(2019RT13)
通讯作者:  * 谭毅,大连理工大学教授。1983年7月毕业于大连理工大学,获得学士学位;1986年7月毕业于大连理工大学,获得硕士学位;1993年3月毕业于东京工业大学,获得博士学位。主要研究方向为高温合金、钛合金、多晶硅、储能材料及相关装备的研发。发表论文230 余篇,申报国际、国家及与企业合作发明专利220余项,承担国家科技支撑计划项目等20余项。lnsolar@dlut.edu.cn   
作者简介:  王以霖,2019年6月毕业于沈阳航空航天大学,获得工学学士学位,现为大连理工大学材料科学与工程学院硕士研究生,在谭毅教授的指导下进行研究。目前主要研究领域为合金的熔炼与组织调控。
引用本文:    
王以霖, 谭毅, 崔传勇, 游小刚, 赵龙海, 崔弘阳, 李鹏廷, 李晓娜. 电子束熔炼新型Ni-Co基高温合金过程中合金元素的挥发行为及熔池温度计算[J]. 材料导报, 2023, 37(1): 21080061-6.
WANG Yilin, TAN Yi, CUI Chuanyong, YOU Xiaogang, ZHAO Longhai, CUI Hongyang, LI Pengting, LI Xiaona. Evaporation Behavior of Alloying Elements and Calculation of Molten Pool Temperature in Electron Beam Smelting of a New Ni-Co Based Superalloy. Materials Reports, 2023, 37(1): 21080061-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21080061  或          http://www.mater-rep.com/CN/Y2023/V37/I1/21080061
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