2024 №01 (08) DOI of Article
2024 №01 (02)

Automatic Welding 2024 #01
Avtomaticheskaya Svarka (Automatic Welding), #1, 2024, pp. 9-14

Influence of arc welding technology on resistance of welded joints of 06G2BDP steel to cold and hot cracks formation, fatigue and brittle fracture

O.A. Haivoronskyi1, V.D. Poznyakov1, S.L. Zhdanov1, A.M. Gerasymenko1, V.D. Ryabokon1, A.O. Maksymenko1, Jianxin Wang2

1E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2Jiangsu University of Science and Technology, No. 666, Changhui Road, Dantu District, Zhenjiang, Jiangsu, China

The paper studies the effect of arc welding technological processes on the resistance of welded joints of scarcely alloyed atmosphere-resistant 06G2BDP steel to cold and hot cracks formation and brittle and fatigue fracture. With the help of the Implant method and using the technological Tekken sample, the conditions for cold cracks formation were evaluated and the methods of their elimination were recommended. It is shown that with the use of mechanized welding in shielding gases, solidsection and flux-cored wires provide high technological strength of welded joints in terms of hot cracks formation in a wide range of welding modes. On the other hand, when using coated electrodes, this range is narrowed, and at Vdef ≥ 20 mm/min, joints are prone to the formation of this defect. The results of studies on the evaluation of welded joints resistance to brittle fracture indicate high values of the stress intensity factor KQ for both the weld metal and HAZ metal. The endurance limit of T-joints when tested by cyclic loading was determined, which is [ σ ]-1 = 35 MPa. 15 Ref., 1 Tabl., 5 Fig.
Keywords: atmosphere-resistant steel, welded joints, cold cracks, hot cracks, brittle fracture, cyclic loading, fatigue fracture

Received: 13.11.2023
Received in revised form: 01.12.2023
Accepted: 25.12.2023


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