Mechanisms of reactive element Y on the purification of K4169 superalloy during vacuum induction melting
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第6期
论文作者：Qing-ling Li Hua-rui Zhang Ming Gao Jin-peng Li Tong-xiao Tao Hu Zhang
文章页码：696 - 703
摘 要：The effects of rare earth element Y on the purification of K4169 superalloy during vacuum induction melting were investigated at different superheating temperatures. The corresponding interaction mechanisms were also clarified. Results showed that the addition of Y remarkably promoted the purification effect on the K4169 melt. The contents of O and S in the K4169 as-cast alloy ingots after purification were 3–4 and 8–10 ppm, respectively. The degrees of deoxidation and desulfurization increased to 50% and 57%, respectively, upon the addition of 0.1 wt% Y. The yttrium-rich phase that precipitated at the grain boundary blocked the diffusion of C and the accumulation of S, thereby contributing to the purification of the alloy.
Qing-ling Li1，Hua-rui Zhang1，Ming Gao1，Jin-peng Li1，Tong-xiao Tao2，Hu Zhang1
1. School of Materials Science and Engineering, Beihang University2. Qingdao Institute of New Material Technology of Beihang University
摘 要：The effects of rare earth element Y on the purification of K4169 superalloy during vacuum induction melting were investigated at different superheating temperatures. The corresponding interaction mechanisms were also clarified. Results showed that the addition of Y remarkably promoted the purification effect on the K4169 melt. The contents of O and S in the K4169 as-cast alloy ingots after purification were 3–4 and 8–10 ppm, respectively. The degrees of deoxidation and desulfurization increased to 50% and 57%, respectively, upon the addition of 0.1 wt% Y. The yttrium-rich phase that precipitated at the grain boundary blocked the diffusion of C and the accumulation of S, thereby contributing to the purification of the alloy.
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