DETERMINATION OF OPTIMAL UNDERWATER CUTTING PARAMETERS FOR SHIP HULL STEEL OF SCIENTIFIC RESEARCH VESSEL RSV 421 "ST. ST. CYRIL AND METHODIUS"
DOI:
https://doi.org/10.68302/std2026.vol2.121Keywords:
cutting parameters, exothermic electrodes, safety protocols, underwater cutting, underwater repair proceduresAbstract
This article presents an in-depth study of underwater exothermic cutting technology with exothermic electrodes, applied to the hull steel of the Bulgarian research vessel RSV 421 "St. St. Cyril and Methodius". Having identified the steel type in previous studies as low-carbon Grade A, the focus here shifts to the optimization of underwater repair procedures. The thermodynamic fundamentals of the exothermic reaction, the impact of hydrostatic pressure on cutting parameters, and the strict safety protocols required for operations in extreme marine conditions are examined. The energy characteristics, the specifications of EP-1 and EP-3 type electrodes, and the metallurgical transformations in the cutting zone are analysed.
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This article was financed by the Ministry of Education and Science under the National Science Program "Security and Defense", carried out in implementation of the National Strategy for the Development of Scientific Research 2017-2030 and adopted by Decision of the Council of Ministers No. 731 of October 21, 2021. The material reflects only the author's opinion and the Ministry of Education and Science is not responsible for the content.Downloads
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Copyright (c) 2026 Hristo Hristov, Momchil Manov
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