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VACUUM ›› 2023, Vol. 60 ›› Issue (5): 98-101.doi: 10.13385/j.cnki.vacuum.2023.05.16

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Study on the Surface Erosion of Refractory Materials During the Superalloy Vacuum Melting Casting Process

WAN Xu-jie1,2, ZHANG Hua-xia2, ZHANG Feng-xiang2, GAO Hong-ru2, MA Bao-hong3, ZHAO Xin-ying3, LIU Kun1   

  1. 1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
    2. Superalloy Casting Division, Beijing Institute of Aeronautical Materials Co., Ltd Beijing 100095, China;
    3. School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Received:2023-08-26 Online:2023-09-25 Published:2023-09-26

Abstract: In the vacuum melting casting process of superalloys, the intermediate package system is used to transfer the molten alloy into the ingot mold system. The intermediate package system is typically made of refractory materials. In this paper, the formation mechanism of erosive surface of alumina based refractory was studied by observing the change of surface morphology and Cr layer thickness under different erosion times. The results show that under the action of the superalloy liquid erosion, the cross-section of the refractory produces a zonal Cr layer, and its thickness increases first and then decreases with the increase of the erosion time, and finally tends to be stable. When the erosion time is 145min, the refractory and the superalloy liquid reach a dynamic equilibrium state, and the average thickness of Cr layer is stable at about 400μm.

Key words: superalloy, vacuum melting, erosion time, refractory material

CLC Number:  TF132+.12;TF341.7

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