Trace element control in binary Ni-25Cr and ternary Ni-30Co-30Cr master alloy castings
- National Energy Technology Lab. (NETL), Albany, OR (United States); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
- National Energy Technology Lab. (NETL), Albany, OR (United States);
Electro-slag remelting (ESR) is used for control of unwanted elements in commercial alloys. This study focuses on master alloys of Ni-25Cr and Ni-30Co-30Cr, processed through a combination of vacuum induction melting (VIM) and electro-slag remelting (ESR). Minor additions were made to control tramp element levels and modify the melting characteristics. Nitrogen and sulfur levels below 10 ppm and oxygen levels below 100 ppm were obtained in the final products. The role of the alloy additions in lowering the tramp element content, the resulting residual inclusions and the melting characteristics were determined computationally and confirmed experimentally. Additions of titanium were beneficial to the control of oxygen levels during VIM and nitrogen levels during ESR. Aluminum additions helped to control oxygen levels during remelting, however, aluminum pickup occurred when excess titanium was present during ESR. The usefulness of these master alloys for use as experimental remelt stock will also be discussed.
- Research Organization:
- National Energy Technology Lab. (NETL), Albany, OR (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- OSTI ID:
- 1406915
- Report Number(s):
- NETL-PUB-21455
- Resource Relation:
- Conference: Liquid metal processing & casting conference (LMPC 2017), Philadelphia, PA (United States), 10-13 Sep 2017
- Country of Publication:
- United States
- Language:
- English
Similar Records
Impact of Fill Factor on Electro-slag Remelting Operations
The effect of aluminum as an alloying addition or as an implant on the high-temperature oxidation of Ni-25Cr