Original scientific paper

https://doi.org/10.21278/TOF.463039822

Behaviour of High-Alloy Steel Welded Joints of Steam Pipelines under the Influence of Temperature and Exploitation Time

Ermin Bajramović orcid.org/0000-0002-5444-3873 ; University of Bihać, Faculty of Technical Engineering Bihać, Bihać, Bosnia and Herzegovina
Dženana Gačo ; University of Bihać, Faculty of Technical Engineering Bihać, Bihać, Bosnia and Herzegovina
Fadil Islamović ; University of Bihać, Faculty of Technical Engineering Bihać, Bihać, Bosnia and Herzegovina

Abstract

The aim of this paper was to determine, as comprehensively as possible, the influence of temperature on the behaviour of welded joints made of high-alloy steel and intended for operation at elevated temperatures in thermal power plants, i.e. steam pipelines, during their exploitation. The influence of exploitation conditions (temperature and exploitation time) on the mechanical exploitation and structural properties of the base metal and welded joint made of high-alloy steel X20 CrMoV 12-1 was analysed by testing samples of the new material and samples of the material that was in operation. Testing of the new and the used material, i.e., base metal and welded joint components (weld metal and heat affected zones), included determination of tensile properties at room temperature of 20 ºC and at elevated temperatures of 545 ºC and 570 ºC.

Keywords

welded joint; tensile properties; temperature; exploitation time; experiment

Hrčak ID:

284559

URI

https://hrcak.srce.hr/284559

Publication date:

20.10.2022.

Visits: 856 *