MATEC Web Conf.
Volume 110, 2017International Youth Scientific Conference “Heat and Mass Transfer in the Thermal Control System of Technical and Technological Energy Equipment” (HMTTSC 2017)
|Number of page(s)
|19 June 2017
The microhardness and internal stresses allocation in superheating pipes welded node made of dissimilar steels
1 National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
2 Polzunov Altai State Technical University, 656038 Barnaul, Russia
* Corresponding author: firstname.lastname@example.org
The object of research is the welded knot made of dissimilar steels 12Cr1MoV and Di-59. Research methods are spectral analysis, microhardness measurements and X-ray analysis. It is established that the structural-phase nonuniformity, significant concentration fluctuations of alloying elements, the spread in values of microhardness and mechanical characteristics along the length of the pipe can cause significant value of internal macrostress that leads to the formation of the “flaw” defect type in the welding process. It is shown how to distinguish between flaws that have appeared on the stage of production from operating flaws.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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