The microhardness and internal stresses allocation in superheating pipes welded node made of dissimilar steels

Abstract

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.

Original language	English
Article number	01047
Journal	MATEC Web of Conferences
Volume	110
DOIs	https://doi.org/10.1051/matecconf/201711001047
Publication status	Published - 19 Jun 2017

ASJC Scopus subject areas

Chemistry(all)
Engineering(all)
Materials Science(all)

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10.1051/matecconf/201711001047

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Ilyasova, A., Kulesh, R., Lyubimova, L., Tashlykov, A., Gerasimov, A., Zavorin, A., & Puzyrev, E. (2017). The microhardness and internal stresses allocation in superheating pipes welded node made of dissimilar steels. MATEC Web of Conferences, 110, [01047]. https://doi.org/10.1051/matecconf/201711001047

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AU - Ilyasova, Aigul

AU - Kulesh, Roman

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AU - Tashlykov, Alexander

AU - Gerasimov, Anton

AU - Zavorin, Alexander

AU - Puzyrev, Evgenii

PY - 2017/6/19

Y1 - 2017/6/19

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AB - 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.

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