Electroslag remelting process
Electroslag remelting process (abbreviation ESU) is a metallurgical process for the production of steels with high purity, directionally solidified and therefore fault-free structures or special alloys such as titanium.
In this process, a solid steel block is immersed in the slag bath of a mold , which also functions as an electrical resistor. The block acts as a current-carrying electrode and melts. As it passes through the slag, sulfur and non-metallic inclusions are absorbed by the slag and later deposited. The steel solidifies under the slag in a copper mold.
Steels produced in this way have improved technological properties:
- high sulfidic and oxidic degree of purity
- Uniform solidification structure through the entire block length and the entire block cross-section
- particularly high tensile strength
- very good toughness even in the core of large workpieces
Individual evidence
- ↑ ESU - electroslag remelting plant. Retrieved December 4, 2019 .