| 2026 №01 (06) |
DOI of Article 10.37434/as2026.01.07 |
2026 №01 (01) |
"Avtomatychne Zvaryuvannya" (Automatic Welding), #1, 2026, pp. 58-63
Improvement of quality characteristics of a welded joint of a combined rotor
V.V. Dmitrik1, Chen Xinlei1, I.V. Kasianenko1, O.S. Harashchenko1, O.L. Platuhin2
1National Technical University «Kharkiv Polytechnic Institute». 2 Kyrpychova Str., 61002, Kharkiv, Ukraine. E-mail: dmitrikvitali@gmail.com2JSC «Ukrainian Energy Machines». 199 Heroiv Kharkova Ave., 61037, Kharkiv, Ukraine.
The features of the structure of a welded joint of a combined medium-pressure rotor made of 20Kh3MVFA and 25Kh2NMFA steels are presented. The rotor manufacturing process involved automatic welding using mode parameters that were optimized by welding heat simulation. The implementation of the proposed automatic welding process ensured producing of a rotor welded joint with improved indices of its initial structure and increased mechanical properties. An analysis of the microstructure of the weld metal and the heat-affected zone of the combined welded joint was performed, and its mechanical properties were determined. It was found that these indices are higher than similar characteristics obtained using standard technology, which did not involve welding heat simulation. 11 Ref., 7 Tabl., 8 Fig.
Keywords: combined welded joint, rotor, turbine, crack, structure, heat-affected zone, parameters of the mode, mechanical properties, welding materials, heat treatment, chemical composition
Received: 15.12.2024
Received in revised form: 13.11.2025
Accepted: 14.01.2026
References
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