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FORET, R., MILLION, B., SVOBODA, M., STRÁNSKÝ, K.
Original Title
Structural stability of dissimilar weld joints of steel P91
Type
journal article - other
Language
English
Original Abstract
This paper addresses the issue of C and N redistribution in weld joints of creep-resistant chromium steels. The redistribution of C and N was measured using the wave-dispersive X-ray method. The conditions of the long-term diffusion annealing process were: temperature 575, 625 and 700 oC; time 10, 100, 1 000 and 5 000 hours. It was ascertained that C and N diffused from the low-alloy steels to the high-alloy steel P91. The carbon diffusion coefficients in the individual steels of 15128/P91 and SK3STC/P91 weld joints, the ratio between the thermodynamic activity coefficients of carbon in joints, the diffusion interaction parameters , and their temperature dependencies were estimated from carbon concentration curves. The paper also contains a microstructure analysis of decarburized and carburized zones in the weld joints studied.
Keywords
structural stabilidy, creep-resistant steels, weld joints, redistribution of C and N
Authors
RIV year
2002
Released
1. 1. 2002
ISBN
1362-1718
Periodical
Science and Technology of Welding and Joinig
Year of study
6
Number
State
United Kingdom of Great Britain and Northern Ireland
Pages from
405
Pages to
411
Pages count
7
BibTex
@{BUT71861 }