SOPOUŠEK, Jiří and Rudolf FORET. CARBON AND NITROGEN REDISTRIBUTION IN WELD JOINTS OF HEAT RESISTANT STEELS. In 1-st International Conference Super-High Strenght Steels. Roma: Associazione Italiana di Metallurgia. p. 60/1-9, 9 pp. ISBN 88-85298-56-7. 2005.
Other formats:   BibTeX LaTeX RIS
Basic information
Original name CARBON AND NITROGEN REDISTRIBUTION IN WELD JOINTS OF HEAT RESISTANT STEELS
Name in Czech Přerozdělení uhlíku a dusíku ve svarových spojích žárovzdorných ocelí
Name (in English) CARBON AND NITROGEN REDISTRIBUTION IN WELD JOINTS OF HEAT RESISTANT STEELS
Authors SOPOUŠEK, Jiří (203 Czech Republic, guarantor) and Rudolf FORET (203 Czech Republic).
Edition Roma, 1-st International Conference Super-High Strenght Steels, p. 60/1-9, 9 pp. 2005.
Publisher Associazione Italiana di Metallurgia
Other information
Original language Czech
Type of outcome Proceedings paper
Field of Study 10403 Physical chemistry
Country of publisher Italy
Confidentiality degree is not subject to a state or trade secret
RIV identification code RIV/00216224:14310/05:00012734
Organization unit Faculty of Science
ISBN 88-85298-56-7
Keywords in English weldment;phase;DICTRA;CALPHAD;P91;carbonitride
Tags CALPHAD, carbonitride, DICTRA, P91, phase, weldment
Changed by Changed by: prof. RNDr. Jiří Sopoušek, CSc., učo 2405. Changed: 27/1/2006 16:07.
Abstract
The present contribution deals with the theoretical modelling of the kinetics of the development of chemical composition and phase profiles of heterogeneous laboratory weld joints of heat resistant steels from the point of view of their long-term stability. The T25 ( 6 CrMoV 8-3-2) heat-resistant ferritic steel currently being developed and the advanced P91 (X10CrMoVNb 10-1) chromium steel, both steels after ion nitriding, homogenisation at 1050şC and weld joining were the subject of study. The basic compositions of materials were approximated as the Fe-Cr-Ni-Mo-V-C-N system. The long-term annealing of the T25+0.1129wt%N | P91+(0.8-0.064wt)N weld joints were simulated at 600şC and 900şC. The simulated results were compared with experimental carbon profile observations. The phase diagrams of the investigated materials were calculated using the CALPHAD approach [1] and applying the STEEL thermodynamic database [2]. The activities of carbon, nitrogen, and other elements were calculated by the same method. The CALPHAD approach complemented with an appropriate diffusion model [3] given in the DICTRA code enabled simulating the phase and element profile evolutions inside the diffusion-affected zone of weld joint. The DIF kinetic database [4] was used to describe the diffusion. In the simulation the coexistence of different phases (carbides, carbonitrides,) was assumed.
Abstract (in English)
The present contribution deals with the theoretical modelling of the kinetics of the development of chemical composition and phase profiles of heterogeneous laboratory weld joints of heat resistant steels from the point of view of their long-term stability. The T25 ( 6 CrMoV 8-3-2) heat-resistant ferritic steel currently being developed and the advanced P91 (X10CrMoVNb 10-1) chromium steel, both steels after ion nitriding, homogenisation at 1050şC and weld joining were the subject of study. The basic compositions of materials were approximated as the Fe-Cr-Ni-Mo-V-C-N system. The long-term annealing of the T25+0.1129wt%N | P91+(0.8-0.064wt)N weld joints were simulated at 600şC and 900şC. The simulated results were compared with experimental carbon profile observations. The phase diagrams of the investigated materials were calculated using the CALPHAD approach [1] and applying the STEEL thermodynamic database [2]. The activities of carbon, nitrogen, and other elements were calculated by the same method. The CALPHAD approach complemented with an appropriate diffusion model [3] given in the DICTRA code enabled simulating the phase and element profile evolutions inside the diffusion-affected zone of weld joint. The DIF kinetic database [4] was used to describe the diffusion. In the simulation the coexistence of different phases (carbides, carbonitrides,) was assumed.
Links
GA106/03/0636, research and development projectName: Teoretické modelování a experimentální studium strukturní stability moderních žárupevných ocelí a jejich svarů
MSM0021622410, plan (intention)Name: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur
Investor: Ministry of Education, Youth and Sports of the CR, Physical and chemical properties of advanced materials and structures
PrintDisplayed: 19/4/2024 17:51