INCONEL718高温合金均匀化处理的定量分析

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 21; no. 5; pp. 1009 - 1017
Main Author 缪竹骏 单爱党 吴元彪 卢俊 徐文亮 宋洪伟
Format Journal Article
LanguageEnglish
Published 2011
Subjects
INCONEL718高温合金
Laves相
偏析
均匀化处理
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ISSN1003-6326

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Bibliography:MIAO Zhu-jun, SHAN Ai-dang, WU Yuan-biao, LU Jun, XU Wen-liang, SONG Hong-wei（1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. Baosteel Research Institute, Baoshan Iron ＆ Steel Co., Ltd., Shanghai 201900, China）
43-1239/TG
INCONEL718; superalloy; homogenization; Laves phase; segregation
Quantitative analysis was employed to establish reasonable and practical homogenization model of INCONEL718 superalloy. Metallographic method was applied to determining the incipient melting temperature. The result shows that the incipient melting temperature of d406 mm INCONEL718 ingot is situated between 1 170 ℃ and 1 180 ℃. In order to predict the elimination process of Laves phase in quantity, a time and temperature dependent homogenization model was proposed. Among all the elements in the as-cast microstructure, Nb and Ti are the most positive segregated elements. The diffusion coefficients of alloying elements at 1 140 ℃ were obtained by fitting the linear relationship between In δ （δ residual segregation index） and time. The calculation results of diffusion coefficients were compared with other two commercial Nb-bearing superalloys.
ISSN:1003-6326