Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91
Steel Weldment At Temperature Range 700-575oC

D 2002

Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91 Steel Weldment At Temperature Range 700-575oC

JAN, Vít and Jiří SOPOUŠEK

Basic information

Original name

Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91 Steel Weldment At Temperature Range 700-575oC

Authors

JAN, Vít (203 Czech Republic) and Jiří SOPOUŠEK (203 Czech Republic, guarantor)

Edition

Roma, Thermodynamics of Alloys TOFA 2002, p. PO55, 1 pp. 2002

Publisher

Universita di Roma "La Sapiensa"

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10403 Physical chemistry

Country of publisher

Italy

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/02:00006364

Organization unit

Faculty of Science

Keywords in English

DICTRA;ThernoCalc;phase;diffusion;CALPHAD

Abstract

V originále

The study the relationships among the element redistributions, the microstructure at various positions across the weldments, and local mechanical properties represents the basic source for advanced design of stable welds of dissimilar alloys. The kinetics of phase transformations in diffusion-affected zone determine weld stability in many cases. The processes in welded joint of progressive steel P91 (8,5wt% Cr -0,88%Mo-0,23%V-0,045%N-0,1%C) and 3Cr1Mo electrode (2,73wt%Cr-0,96%Mo-0,12%C) were simulated using combination of CALPHAD method(1) and the same method as can be found in DICTRA programme(2, 3, 4) . The thermodynamic database STEEL11.TDB(5) and mobility database DIF12.TDB(6) were applied for the simulations of the weldments at long treatment . This two databases were developed in Brno and they are assessed for calculation of phase diagrams and the simulations of the weldments at temperatures about 500oC too. The equilibrium calculations using CALPHAD method allowed us to predict phase diagrams for both 3Cr1Mo and P91 steels. The diffusion and phase transformation processes occurred in 3Cr1Mo/P91 welded join were simulated using DICTRA programme. It enabled us to evaluate time-distance dependences for phase compositions and element redistribution in diffusion-affected zone at temperature range 700-575oC. This simulation results at different temperatures are complemented with experimental results. The most interesting results concern carbonitride, and high molybdenium carbide phase transformations. The described method can be used for weldments design.

Links

GA106/00/0855, research and development project

Name: Kinetika precipitace karbidů v Cr-Mo ocelích

Investor: Czech Science Foundation, Kinetics of carbide precipitation in Cr-Mo steels

Citovat

JAN, Vít and Jiří SOPOUŠEK. Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91 Steel Weldment At Temperature Range 700-575oC. In Thermodynamics of Alloys TOFA 2002. Roma: Universita di Roma "La Sapiensa", 2002, p. PO55, 1 pp.

@inproceedings{405165,
   author = {Jan, Vít and Sopoušek, Jiří},
   address = {Roma},
   booktitle = {Thermodynamics of Alloys TOFA 2002},
   keywords = {DICTRA;ThernoCalc;phase;diffusion;CALPHAD},
   language = {eng},
   location = {Roma},
   pages = {PO55},
   publisher = {Universita di Roma "La Sapiensa"},
   title = {Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91 Steel Weldment At Temperature Range 700-575oC},
   year = {2002}
}

TY  - JOUR
ID  - 405165
AU  - Jan, Vít - Sopoušek, Jiří
PY  - 2002
TI  - Simulation of Carbide/Nitride Precipitation in 3%Cr1%Mo/P91 Steel Weldment At Temperature Range 700-575oC
PB  - Universita di Roma "La Sapiensa"
CY  - Roma
KW  - DICTRA;ThernoCalc;phase;diffusion;CALPHAD
N2  - The study the relationships among the element redistributions, the microstructure at various positions across the weldments, and local mechanical properties represents the basic source for advanced design of stable welds of dissimilar alloys. The kinetics of phase transformations in diffusion-affected zone determine weld stability in many cases. The processes in welded joint of progressive steel P91 (8,5wt% Cr -0,88%Mo-0,23%V-0,045%N-0,1%C) and 3Cr1Mo electrode (2,73wt%Cr-0,96%Mo-0,12%C) were simulated using combination of CALPHAD method(1) and the same method as can be found in DICTRA programme(2, 3, 4) . The thermodynamic database STEEL11.TDB(5) and mobility database DIF12.TDB(6) were applied for the simulations of the weldments at long treatment . This two databases were developed in Brno and they are assessed for calculation of phase diagrams and the simulations of the weldments at temperatures about 500oC too. The equilibrium calculations using CALPHAD method allowed us to predict phase diagrams for both 3Cr1Mo and P91 steels. The diffusion and phase transformation processes occurred in 3Cr1Mo/P91 welded join were simulated using DICTRA programme. It enabled us to evaluate time-distance dependences for phase compositions and element redistribution in diffusion-affected zone at temperature range 700-575oC. This simulation results at different temperatures are complemented with experimental results. The most interesting results concern carbonitride, and high molybdenium carbide phase transformations. The described method can be used for weldments design.
ER  -

JAN, Vít and Jiří SOPOUŠEK. Simulation of Carbide/Nitride Precipitation in 3\%{}Cr1\%{}Mo/P91 Steel Weldment At Temperature Range 700-575oC. In \textit{Thermodynamics of Alloys TOFA 2002}. Roma: Universita di Roma ''La Sapiensa'', 2002, p.~PO55, 1 pp.

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