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Study of the Weldability of Austenitic PH Steel for Power Plants

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Języki publikacji
EN
Abstrakty
EN
The article presents the results of Transvarestraint test of a modern precipitation hardened steel X10CrNiCuNb18-9-3 with copper. For comparison, the results of tests of conventional steel without the addition of copper X5CrNi18-10 are presented. The total length of all cracks and the maximum length of cracks were measured. The study of microstructure (LM, SEM) showed that the austenitic stainless steel X10CrNiCuNb18-9-3 is very prone to hot cracking. After performing the Transvarestraint tests three types of cracks were observed: solidification cracks occurring during crystallization, liquation cracks due to segregation in the heat affected zone (HAZ) and surface cracks. Niobium carbonitrides dispersed in the bands of segregation are the reason of high susceptibility to liquation cracking. Segregation of copper occurring during solidification causes of surface cracking. A combined effect of copper and stresses contributes to formation of hot microcracks. These microcracks propagate to a depth of 20-30 μm.
Twórcy
autor
  • AGH University of Science and Technology
Bibliografia
  • [1] J. Dobrzański, A. Zieliński, H. Purzyńska, Prace IMŻ 3, 13-28 (2014).
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Uwagi
EN
The research was carried out within the statutory research project no 11.11.110.299
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-33357a57-4abe-4f19-b91b-b3d43ae12abf
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