PSI - Issue 36

ScienceDirect Available online at www.sciencedirect.com Sci nceD rect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 36 (2022) 100–105

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors 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-Cu 2 Se, which worsens ductility of copper and its weldability. It is shown t hat 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%. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors Keywords: copper chambers; defects; cracs; welding process. 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Reasons of metal degradation of copper chambers of arc steelmaking furnaces during operation and possibilities of their restorative repair Valentin Ilyushenko a , Taras Maydanchuk a , Yevheniia Lukianchenko a , Sergiy Kozulin a , Sergiy Marynenko b * a E.О. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine;11 Kazimir Malevich St., Kyiv 03150, Ukraine b Ternopil Ivan Puluj National Technical University; 56 Ruska St., Ternopi l 46001, Ukraine 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 a d gas analyses sh w that the studied copp r can be classified as brand deoxidized copper ASTM C12900 wi h the pr sence of up to 0.0033% elenium. Given that the solubility of Se in copper is negligible (~0.001% at 500 ° C), at such conc ntrations may f rm a low-m lting eutectic Cu-Cu 2 Se, which worsens ductility of copper and its weldability. It is shown t hat at temperatures above 350 ° С the inv s gated is embrittled. These cracks subsequently s read along th thickness of t e metal, which is facilit ted by the thermo-deformation conditions of the copper cameras. A a resu t of experime tal works the technology of restor tion of the worn-out copper chambers with use helium-arc welding is chosen, which made it possible to ext nd t e life of th ir work by 70...90%. © 2022 The Auth rs. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of t conference Guest Editors Keywords: copper chambers; defects; cracs; welding process. 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Reasons of metal degradation of copper chambers of arc steelmaking furnaces during operation and possibilities of their restorative repair Valentin Ilyushenko a , Taras Maydanchuk a , Yevheniia Lukianchenko a , Sergiy Kozulin a , Sergiy Marynenko b * a E.О. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine;11 Kazimir Malevich St., Kyiv 03150, Ukraine b Ternopil Ivan Puluj National Technical University; 56 Ruska St., Ternopi l 46001, Ukraine

* Corresponding author. Tel.: +38-096-194-34-33; fax: +38-044-200-24-66. E-mail address: maydanchuk_taras@ukr.net * Corresponding author. Tel.: +38-096-194-34-33; fax: +38-044-200-24-66. E-mail address: maydanchuk_taras@ukr.net

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors 10.1016/j.prostr.2022.01.009