Abstract
Characteristic defects of gas-oxygen copper chambers of arc steelmaking furnaces (ASF) which are formed at their operation are defined. The results of chemical and gas analyses show that the studied copper can be classified as brand deoxidized copper ASTM C12900 with the presence of up to 0.0033% selenium. Given that the solubility of Se in copper is negligible (~0.001% at 500 °C), at such concentrations may form a low-melting eutectic Cu-Cu2Se, which worsens ductility of copper and its weldability. It is shown that at temperatures above 350 °С the investigated is embrittled. These cracks subsequently spread along the thickness of the metal, which is facilitated by the thermo-deformation conditions of the copper cameras. As a result of experimental works the technology of restoration of the worn-out copper chambers with use helium-arc welding is chosen, which made it possible to extend the life of their work by 70...90%.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
