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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F14%3A00219215%21RIV15-MSM-21220___
rdf:type
n6:Vysledek skos:Concept
dcterms:description
The construction of new power plants and modernization of existing plants, which are mostly at the end of their service life, increasingly require the use of new construction materials. In this sector modified martensitic 9-12% Cr steels such as type P/T92 and low-alloy steels derived from modified steel 2.5Cr1Mo (ASTM marked P/T23) are considered as promising. In the construction of power units so-called heterogeneous joints, which most often consist of a combination of low-alloyed materials and highly-alloyed ones, will then be avoided. These weld joints are often the weak link in the construction. Knowledge of the behavior of creep-resistant welded joints is very important for the subsequent evaluation of the life of the units. This work deals with the degradation of heterogeneous welded joints of steel T23 - T92 and 15CH1M1F - P91, using commercially produced weld materials Thermanit MTS 616 (highly-alloyed), Union I P23; ThermanitP23, Böhler P23-IG and Thermanit (FOX) P23 (low-alloyed). In the heterogeneous welds examined slight strength loss of the base material occured during isothermal heat exposure and extension of the diffusion active zones, i.e. Carbon Depleted Zone (CDZ) and Carbon Enriched Zone (CEZ), were observed. These degradation processes caused structural instability of heterogeneous welds. On the basis of experimental tests carried out so far it seems a better option is to use low-alloyed weld material rather than highly-alloyed ones. Because of the service conditions of high load, it is necessary to verify the properties of welds and to perform other laboratory analyses. The construction of new power plants and modernization of existing plants, which are mostly at the end of their service life, increasingly require the use of new construction materials. In this sector modified martensitic 9-12% Cr steels such as type P/T92 and low-alloy steels derived from modified steel 2.5Cr1Mo (ASTM marked P/T23) are considered as promising. In the construction of power units so-called heterogeneous joints, which most often consist of a combination of low-alloyed materials and highly-alloyed ones, will then be avoided. These weld joints are often the weak link in the construction. Knowledge of the behavior of creep-resistant welded joints is very important for the subsequent evaluation of the life of the units. This work deals with the degradation of heterogeneous welded joints of steel T23 - T92 and 15CH1M1F - P91, using commercially produced weld materials Thermanit MTS 616 (highly-alloyed), Union I P23; ThermanitP23, Böhler P23-IG and Thermanit (FOX) P23 (low-alloyed). In the heterogeneous welds examined slight strength loss of the base material occured during isothermal heat exposure and extension of the diffusion active zones, i.e. Carbon Depleted Zone (CDZ) and Carbon Enriched Zone (CEZ), were observed. These degradation processes caused structural instability of heterogeneous welds. On the basis of experimental tests carried out so far it seems a better option is to use low-alloyed weld material rather than highly-alloyed ones. Because of the service conditions of high load, it is necessary to verify the properties of welds and to perform other laboratory analyses.
dcterms:title
Heterogeneous welded joints (T23-T92; 15CH1M1F-P91) Heterogeneous welded joints (T23-T92; 15CH1M1F-P91)
skos:prefLabel
Heterogeneous welded joints (T23-T92; 15CH1M1F-P91) Heterogeneous welded joints (T23-T92; 15CH1M1F-P91)
skos:notation
RIV/68407700:21220/14:00219215!RIV15-MSM-21220___
n3:aktivita
n17:P
n3:aktivity
P(LO1207), P(TA03010150)
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n7:5591643 n7:9960791
n3:druhVysledku
n15:D
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
18999
n3:idVysledku
RIV/68407700:21220/14:00219215
n3:jazykVysledku
n13:eng
n3:klicovaSlova
High-parametric steel; creep-resistant steel; T23; T92; P91; 15CH1M1F; weld joint; ferritic steel; bainitic steel; martensitic steel; HV10; HV0,1; structural stability
n3:klicoveSlovo
n4:T92 n4:weld%20joint n4:bainitic%20steel n4:15CH1M1F n4:HV0 n4:High-parametric%20steel n4:HV10 n4:martensitic%20steel n4:creep-resistant%20steel n4:1 n4:P91 n4:ferritic%20steel n4:structural%20stability n4:T23
n3:kontrolniKodProRIV
[3B843A325279]
n3:mistoKonaniAkce
Lázně Libverda
n3:mistoVydani
Praha
n3:nazevZdroje
Přínos metalografie pro řešení výrobních problémů 2014 - Sborník přednášek
n3:obor
n18:JG
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n5:LO1207 n5:TA03010150
n3:rokUplatneniVysledku
n9:2014
n3:tvurceVysledku
Janovec, Jiří Ducháček, Petr
n3:typAkce
n20:CST
n3:zahajeniAkce
2014-06-17+02:00
s:numberOfPages
6
n11:hasPublisher
České vysoké učení technické v Praze. Fakulta strojní
n14:isbn
978-80-01-05474-1
n19:organizacniJednotka
21220