. "This article summarizes the results of evaluation of the microstructure stability, including the relationships between the tested individual material properties and their changes during long-term exposure at elevated temperatures of three creep-resistant steels, i.e. T23, P91, P92 (basic materials as well as their homogeneous weld joints) and possibilities of applications achieved laboratory results under service conditions. To meet these objectives, metallographic analysis using light and electron microscopy, including X-ray diffraction, mechanical and corrosion tests of studied steels have been carried out. To accelerate the degradation processes taking place in the operating conditions, the samples of basic materials and weld joints were exposed to the temperature (600, 625, 650 and 700) \u00B0C for up to 15 000 hrs, both without (ageing) and with applied tensile stress from 50 MPa to 400 MPa (creep). If compare the microstructure behaviour of experimental materials in terms of ageing and creep, it can be said that P91 and P92 steels exhibit a higher microstructure stability than T23 steel, when properties of steel T23 are comparable with those of 9Cr steels in the state only after the initial heat treatment. Long-term exposure at elevated temperature causes the degradation of microstructure and mechanical properties of T23 steel, thanks to which it brings back to a classic low-allowed steels of 2.25Cr-1Mo type. Designing the use of T23 steel in power plants, it is necessary to take this fact into account."@en . "Predikce degrada\u010Dn\u00EDho chov\u00E1n\u00ED modifikovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED pro energetiku" . . . . . "978-80-554-0741-8" . . . . . "RIV/60193247:_____/13:UJP1602D" . "Predikce degrada\u010Dn\u00EDho chov\u00E1n\u00ED modifikovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED pro energetiku"@cs . "[D207EC9912B5]" . . . "creep-resisting steel; welding; microstructure; mechanical properties; corrosion; steel T/P23; steel T/P91; steel T/P92"@en . "8"^^ . "\u010Cmakal, Josef" . . "2013-09-04+02:00"^^ . . "Prediction of Degradation Behaviour of Advanced Creep-Resistant Steels in Power Industry"@en . "Predikce degrada\u010Dn\u00EDho chov\u00E1n\u00ED modifikovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED pro energetiku" . "Tento p\u0159\u00EDsp\u011Bvek shrnuje v\u00FDsledky vyhodnocen\u00ED strukturn\u00ED stability, v\u010Detn\u011B nalezen\u00ED vz\u00E1jemn\u00FDch vztah\u016F mezi jednotliv\u00FDmi materi\u00E1lov\u00FDmi vlastnostmi a\u00A0jejich zm\u011Bnami v\u00A0pr\u016Fb\u011Bhu dlouhodob\u00FDch zkou\u0161ek za zv\u00FD\u0161en\u00FDch teplot u\u00A0t\u0159ech sledovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED T23, P91, P92 (z\u00E1kladn\u00EDch materi\u00E1l\u016F a\u00A0jejich homogenn\u00EDch svarov\u00FDch spoj\u016F) a posouzen\u00ED mo\u017Enosti aplikace z\u00EDskan\u00FDch laboratorn\u00EDch v\u00FDsledk\u016F v provozn\u00EDch podm\u00EDnk\u00E1ch. Ke spln\u011Bn\u00ED t\u011Bchto c\u00EDl\u016F byly vyu\u017Eity v\u00FDsledky metalografick\u00E9 anal\u00FDzy pomoc\u00ED metod sv\u011Bteln\u00E9 a elektronov\u00E9 mikroskopie v\u010Detn\u011B RTG difrakce, zkou\u0161ky mechanick\u00FDch a korozn\u00EDch vlastnost\u00ED studovan\u00FDch ocel\u00ED. Pro urychlen\u00ED degrada\u010Dn\u00EDch proces\u016F, prob\u00EDhaj\u00EDc\u00EDch v provozn\u00EDch podm\u00EDnk\u00E1ch, byly vzorky z\u00E1kladn\u00EDch materi\u00E1l\u016F a\u00A0svarov\u00FDch spoj\u016F tepeln\u011B exponov\u00E1ny na teplot\u011B (600, 625, 650 a 700)\u00A0\u00B0C po dobu a\u017E 15\u00A0000\u00A0h, a to jak bez nap\u011Bt\u00ED (st\u00E1rnut\u00ED), tak s\u00A0nap\u011Bt\u00EDm od 50\u00A0MPa do 400\u00A0MPa (creep). Z porovn\u00E1n\u00ED strukturn\u00EDho chov\u00E1n\u00ED experiment\u00E1ln\u00EDch materi\u00E1l\u016F v podm\u00EDnk\u00E1ch st\u00E1rnut\u00ED i\u00A0creepu lze konstatovat, \u017Ee oceli P91 a P92 vykazuj\u00ED vy\u0161\u0161\u00ED strukturn\u00ED stabilitu ne\u017E ocel T23, vlastnosti oceli T23 jsou srovnateln\u00E9 s vlastnostmi 9Cr ocel\u00ED pouze ve stavu po v\u00FDchoz\u00EDm tepeln\u00E9m zpracov\u00E1n\u00ED. Dlouhodob\u00E9 p\u016Fsoben\u00ED zv\u00FD\u0161en\u00E9 teploty pak zp\u016Fsobuje degradaci materi\u00E1lov\u00FDch (strukturn\u00EDch a mechanick\u00FDch) vlastnost\u00ED oceli T23, d\u00EDky n\u011Bmu\u017E se zp\u00E1tky p\u0159ibli\u017Euje klasick\u00FDm n\u00EDzkolegovan\u00FDm ocel\u00EDm typu 2,25Cr-1Mo. S touto skute\u010Dnost\u00ED je tedy nutno p\u0159i konstruk\u010Dn\u00EDch n\u00E1vrz\u00EDch energetick\u00FDch celk\u016F po\u010D\u00EDtat." . . "Svobodov\u00E1, Marie" . . . . "3"^^ . "Predikce degrada\u010Dn\u00EDho chov\u00E1n\u00ED modifikovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED pro energetiku"@cs . "Degrad\u00E1cia kon\u0161truk\u010Dn\u00FDch materi\u00E1lov 2013" . "P(2A-1TP1/057), P(TA02010260)" . . "\u017Dilinsk\u00E1 univerzita v \u017Diline" . "3"^^ . . "Pol\u00E1chov\u00E1, Daniela" . "Prediction of Degradation Behaviour of Advanced Creep-Resistant Steels in Power Industry"@en . . "Tento p\u0159\u00EDsp\u011Bvek shrnuje v\u00FDsledky vyhodnocen\u00ED strukturn\u00ED stability, v\u010Detn\u011B nalezen\u00ED vz\u00E1jemn\u00FDch vztah\u016F mezi jednotliv\u00FDmi materi\u00E1lov\u00FDmi vlastnostmi a\u00A0jejich zm\u011Bnami v\u00A0pr\u016Fb\u011Bhu dlouhodob\u00FDch zkou\u0161ek za zv\u00FD\u0161en\u00FDch teplot u\u00A0t\u0159ech sledovan\u00FDch \u017E\u00E1ropevn\u00FDch ocel\u00ED T23, P91, P92 (z\u00E1kladn\u00EDch materi\u00E1l\u016F a\u00A0jejich homogenn\u00EDch svarov\u00FDch spoj\u016F) a posouzen\u00ED mo\u017Enosti aplikace z\u00EDskan\u00FDch laboratorn\u00EDch v\u00FDsledk\u016F v provozn\u00EDch podm\u00EDnk\u00E1ch. Ke spln\u011Bn\u00ED t\u011Bchto c\u00EDl\u016F byly vyu\u017Eity v\u00FDsledky metalografick\u00E9 anal\u00FDzy pomoc\u00ED metod sv\u011Bteln\u00E9 a elektronov\u00E9 mikroskopie v\u010Detn\u011B RTG difrakce, zkou\u0161ky mechanick\u00FDch a korozn\u00EDch vlastnost\u00ED studovan\u00FDch ocel\u00ED. Pro urychlen\u00ED degrada\u010Dn\u00EDch proces\u016F, prob\u00EDhaj\u00EDc\u00EDch v provozn\u00EDch podm\u00EDnk\u00E1ch, byly vzorky z\u00E1kladn\u00EDch materi\u00E1l\u016F a\u00A0svarov\u00FDch spoj\u016F tepeln\u011B exponov\u00E1ny na teplot\u011B (600, 625, 650 a 700)\u00A0\u00B0C po dobu a\u017E 15\u00A0000\u00A0h, a to jak bez nap\u011Bt\u00ED (st\u00E1rnut\u00ED), tak s\u00A0nap\u011Bt\u00EDm od 50\u00A0MPa do 400\u00A0MPa (creep). Z porovn\u00E1n\u00ED strukturn\u00EDho chov\u00E1n\u00ED experiment\u00E1ln\u00EDch materi\u00E1l\u016F v podm\u00EDnk\u00E1ch st\u00E1rnut\u00ED i\u00A0creepu lze konstatovat, \u017Ee oceli P91 a P92 vykazuj\u00ED vy\u0161\u0161\u00ED strukturn\u00ED stabilitu ne\u017E ocel T23, vlastnosti oceli T23 jsou srovnateln\u00E9 s vlastnostmi 9Cr ocel\u00ED pouze ve stavu po v\u00FDchoz\u00EDm tepeln\u00E9m zpracov\u00E1n\u00ED. Dlouhodob\u00E9 p\u016Fsoben\u00ED zv\u00FD\u0161en\u00E9 teploty pak zp\u016Fsobuje degradaci materi\u00E1lov\u00FDch (strukturn\u00EDch a mechanick\u00FDch) vlastnost\u00ED oceli T23, d\u00EDky n\u011Bmu\u017E se zp\u00E1tky p\u0159ibli\u017Euje klasick\u00FDm n\u00EDzkolegovan\u00FDm ocel\u00EDm typu 2,25Cr-1Mo. S touto skute\u010Dnost\u00ED je tedy nutno p\u0159i konstruk\u010Dn\u00EDch n\u00E1vrz\u00EDch energetick\u00FDch celk\u016F po\u010D\u00EDtat."@cs . . . . "RIV/60193247:_____/13:UJP1602D!RIV14-TA0-60193247" . "Zuberec - Roh\u00E1\u010De, SK" . . . "98637" . "\u017Dilina, SK" .