کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8044350 | 1518918 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of yttrium and vacuum degree on the purification of K417 superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
K417 superalloy castings with different addition of rare earth element Y were produced by vacuum induction melting technology using Y2O3 crucibles under different vacuum degrees. The effects and interaction mechanisms of Y and vacuum degree on the purification of the superalloy were investigated. The results showed that high purification of K417 superalloy with 4â¼5â¯ppm O and N was obtained after addition of Y. There was a characteristic transition during the deoxidation and denitrogenation of the superalloy when the vacuum degree changed. With the addition of 0.5â¯wt% Y in the alloy, the concentration of O could be reduced from 34â¯ppm to 8â¯ppm in rough vacuum and from 13â¯ppm to 4â¯ppm in high vacuum, respectively. High vacuum enhanced the chemical dissolution of Y2O3 crucible. The concentration of N decreased from 43â¯ppm to 14â¯ppm with the addition of Y in rough vacuum condition of 100Pa. Whereas, in high vacuum condition of 0.035Pa, the concentration of N tend to increase from 4â¯ppm to 7â¯ppm. The effect of deoxidation of Y promoted the process of denitrogenation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 152, June 2018, Pages 57-64
Journal: Vacuum - Volume 152, June 2018, Pages 57-64
نویسندگان
Wei-dong Bian, Hua-rui Zhang, Ming Gao, Qing-ling Li, Jin-peng Li, Tong-xiang Tao, Hu Zhang,