Abstract：Nickel-based superalloy is widely used in aviation,aerospace,energy and other fields.With the increase of ingot dimension, the quantity and size of non-metallic inclusions in ingot will also increase, thus affecting the properties of the material. Based on the scanning electron microscope/energy disperse spectroscopy (SEM-EDS), the morphology of inclusions could be obtained. The position, size, area and composition of inclusions could be accurately determined. It also has the advantages of high efficiency and no damage to the sample surface. Through optimizing the determination conditions, the method for the efficient and quantitative statistic characterization of quantity, size and position of Ti(C, N)-Nb non-metallic inclusions in large size nickel-based superalloy ingot was established based on SEM-EDS. The distribution trend of quantity and size of inclusions in two directions (i.e., transverse from edge to center, and longitudinal from head to end) in one nickel-based superalloy ingot was explored. In the transverse section of the ingot, the quantity of inclusions showed a tendency of less at the center and edge, and more at R/2 (a half of radius). From the edge to the center, the average size of the inclusions showed an increasing trend. In the longitudinal direction of the ingot, the quantity of inclusions showed a trend of less at the head and end, but more in the middle. From the head to the end, the average size of the inclusions gradually decreased as a whole. The results were in good agreement with the distribution law reported in literatures. The proposed method was feasible for the rapid, accurate and quantitative characterization of inclusions in nickel-based superalloy.
蔡文毅, 唐超, 杜金辉, 王蓬, 李冬玲, 王海舟. 大尺寸镍基高温合金铸锭夹杂物原位定量统计分布表征方法探究[J]. 冶金分析, 2022, 42(9): 1-8.
CAI Wenyi, TANG Chao, DU Jinhui, WANG Peng, LI Dongling, WANG Haizhou. Study on original position quantitative statistic distribution characterization method for inclusions of large size nickel-based superalloy ingot. , 2022, 42(9): 1-8.
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