Abstract
The differences of macrostructure, microstructure, precipitate and microsegregation of solidification structure by isothermal treatment near the liquids in electromagnetic field and traditional casting of Ni-based superalloy were investigated by optical microscope (OM), X-ray diffractometer (XRD), scanning electron microscopy (SEM) and electron probe X-ray microanalyzer (EPMA). The results show that the microstructure is small and uniform equiaxed grain by isothermal treatment near the liquidus and electromagnetic field. Compared with traditional microstructure, the content of carbide in fine grained casting is less than that of traditional casting, and the carbide is smaller and more dispersed than that of traditional casting. The segregation coefficient of the microstructure by isothermal treatment near the liquidus and electromagnetic field is closer to 1. The electromagnetic field can refine microstructure by making the temperature field and the solute field become more uniform.
| Translated title of the contribution | Effect of electromagnetic field and isothermal treatment near liquidus on solidification microstructure and segregation of Ni-based superalloy |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 990-997 |
| Number of pages | 8 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 May 2019 |