Automatic Welding, 2020, №06



2020 №06 (02)

DOI of Article 10.37434/as2020.06.03

2020 №06 (04)

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Avtomaticheskaya Svarka (Automatic Welding), #6, 2020, pp. 17-22

Structural condition and fatigue damageability of welded joints of steam pipelines

V.V. Dmitrik, A.K. Tsaryuk, O.S. Garashchenko, T.O. Sirenko

National Technical University «Kharkiv Polytechnic Institute», 2, Kirpichova Str., 61002, Kharkiv, Ukraine. E-mail: garaslichenko.helena@gmail.com

At present time, a number of HPP power units having operated about 250,000 h. in a relatively stationary operating condition, changed to a maneuver mode. This transition caused a need in the studying damageability of their equipment according to the mechanism of fatigue and, above all, welded joints of steam pipelines of heat-resistant steels, operating under the conditions of creep. A further increase in fatigue damageability causes an increase in the requirements to the initial structure of both the welded joints being produced as well as the parts to be repaired using welding. 14 Ref., 12 Fig.
Keywords: metal damageability; welded joints; fatigue cracks; structural condition; conditions of creep, dislocations

Received: 11.03.2020

References

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