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- Title
ВЛИЯНИЕ ПОВТОРНОГО НАГРЕВА ПРИ МНОГОПРОХОДНОЙ СВАРКЕ ПОД ФЛЮСОМ НА СОПРОТИВЛЕНИЕ СВАРНЫХ СОЕДИНЕНИЙ РОТОРНОЙ СТАЛИ ЗАМЕДЛЕННОМУ РАЗРУШЕНИЮ
- Authors
Скульский, В. Ю.; Моравецкий, С. И.; Нимко, М. А.; Пащенко, Ю. Г.; Кантор, А. Г.; Дмитрик, В. В.
- Abstract
On the example of the 0.25C-2CrNiMoV rotary steel joints, produced by submerged arc welding using the Implant method, the change in resistance to delayed fracture depending on the temperature of preheating and thermal effect during deposition of new beads was experimentally studied. The nature of change in hardness in the cross-section of quenching steel with surfacing was investigated, which illustrates the formation of quenching and tempering areas under the influence of repeated welding heating. Using critical stresses as a quantitative indicator, causing a delayed fracture, it was shown that after repeated welding heating, the resistance to cracking can increase by about 1.5...2.5 times or more. In the conditions of welding without preheating, repeated one-time and two-time cycles of welding heating increase the resistance to cracks up to the level obtained during welding with preheating up to 150...200 °C.
- Publication
Automatic Welding / Avtomatitcheskaia Svarka, 2019, Issue 3, p18
- ISSN
0005-111X
- Publication type
Article
- DOI
10.15407/as2019.03.02