The Influence of Yttrium Content and Ceramic Crucible Materials on Desulfurization during Vacuum Induction Melting of DD5 Superalloys
Author:
Wang Fuwei12, Cheng Ying12, Zhang Shoubin2, Zhang Rui2, Sun Yanyun12, Guan Kai3, Zhang Huarui12ORCID, Zhang Hu12
Affiliation:
1. Research Institute for Frontier Science, Beihang University, Beijing 100191, China 2. Ningbo Institute of Technology (NIT), Beihang University, Ningbo 315000, China 3. Science and Technology of Advanced High-Temperature Structural Materials Lab, Beijing Institute of Aeronautical Materials, Beijing 100095, China
Abstract
In this study, the effect of adding different contents of yttrium (Y) during vacuum induction melting in Al2O3 and Y2O3 crucibles on the purification of DD5 alloys was investigated. The results show that the Y2O3 crucible exhibited great crucible stability and an excellent desulfurization effect when melting a Y-containing DD5 alloy. The S content of the alloy was reduced from 5.03 ppm to 1.36 ppm with the addition of 0.50 wt.% Y. Element Y combined with free S in the melt to form the YS phase, which was removed from the condensate shell and slag during the vacuum induction melting (VIM) process. Meanwhile, when the alloy was melted in the Y2O3 crucible with 0.50 wt.% Y addition, there was a reduction in S content from 2.77 ppm to 1.36 ppm compared to the Al2O3 crucible. Additionally, the loss of Y decreased from 0.12 wt.% to 0.05 wt.%.
Funder
National Science and Technology Major Project
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