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Segregation of Niobium During Electroslag Remelting Process

  • Yan-wu Dong
  • Zhou-hua Jiang
  • Zheng-bang Li
Article

Abstract

Experiment was carried out after the process parameters were calculated by the model previously established. The relationship between interdendritic spacing and local solidification time (LST) mainly determined by process parameters was exposed. Furthermore, the extent of segregation was studied. The results indicate that LST and interdendritic spacing are the largest and the amount of Laves phase as a result of the niobium segregation is the highest in the center of the ingot, whereas the opposite results are obtained at the edge of ingot. The extent of element segregation and the amount of Laves phase can be reduced when appropriate parameters are used. Therefore, the duration of subsequent homogenization treatments for 718 is shortened and the alloy quality is improved.

Key words

electroslag remelting Inconel 718 segregation local solidification time interdendritic spacing 

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Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  1. 1.School of Materials and MetallurgyNortheastern UniversityShenyang, LiaoningChina
  2. 2.Central Iron and Steel Research InstituteBeijingChina

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